Audi e-tron Concept

Audi presents the highlight of the IAA 2009: the Audi e-tron Concept, a high-performance sports car with a purely electric drive system. Four motors - two each at the front and rear axles - drive the wheels, making the concept car a true quattro. Producing 230 kW (313 hp) and 4,500 Nm (3,319.03 lb-ft) of torque, the two-seater accelerates from 0 to 100 km/h (0 - 62.14 mph) in 4.8 seconds, and from 60 to 120 km/h (37.28 - 74.56 mph) in 4.1 seconds. The lithium-ion battery provides a truly useable energy content of 42.4 kilowatt hours to enable a range of approximately 248 kilometers.

The performance figures are by no means the only evidence of the consistent and holistic strategy. The design makes it clear that the Audi e-tron Concept belongs in the major leagues of sports cars, and the package takes into account the specific realities of an electric vehicle. The battery is directly behind the passenger cabin for an optimal center of gravity and axle load distribution.

The Audi e-tron Concept is able to freely distribute the powerful torque of its four electric motors to the wheels as required. This so-called torque vectoring allows for dazzling dynamics and an undreamed-of level of agility and precision when cornering.

Audi has taken a new and in some cases revolutionary approach to many of the technical modules. A heat pump is used to efficiently warm up and heat the interior. The drive system, the power electronics and the battery are controlled by an innovative thermal management system that is a crucial component for achieving the car's range without compromising its high level of interior comfort. Networking the vehicle electronics with the surroundings, which is referred to as car-to-x communication, opens new dimensions for the optimization of efficiency, safety and convenience.

The Concept
Electric drive systems are still very much outsiders. The first vehicles of this type took to the roads around 1900, yet in 2009 no volume car manufacturer has a car powered exclusively by batteries in its lineup. Fewer than 1,500 electric vehicles are currently registered in Germany, corresponding to only 0.035 percent of all registered vehicles.

Yet electric driving potentially offers numerous advantages. Electric cars reduce the dependence of transportation and the economy on the raw material petroleum. They produce no direct exhaust emissions and thus ease the local burden on the environment. Electric drive systems are also significantly more efficient than combustion engines, consequently making them easier on the customers' wallets. Other strengths include sportiness and the fun they bring to driving. All of the torque is essentially available the moment the driver steps on the accelerator, allowing for breathtaking acceleration.

There is still a lot of work to do before electric cars are ready for volume production, however. The greatest challenge is the integration of the energy storage system. Acceptable range and performance requires a traction battery that is heavy and takes up a lot of space. Audi is taking a new approach to offset these disadvantages - a holistic approach with a specific vehicle package, a systematic lightweight construction concept and an optimal configuration of all components for the electric drive.

The Holistic Approach
The most important development related to batteries for electric drives are lithium-ion cells. Numerous experts throughout the world are working on their further development for use in cars, with the primary objectives being to reduce weight and increase capacity and performance. Audi has also opted for this technology, both for use in a hybrid production vehicle, such as the upcoming Q5 hybrid, and in the e-tron test platform.

The requirement specification for the concept vehicle goes far beyond battery technology and the replacement of the combustion engine with an electric drive system, however. The Audi development engineers decided back in the concept phase to design practically every component and technology based on the new requirements of electric mobility. The interaction of all elements has a decisive influence on the factors efficiency, range and practicality.

The Audi team therefore focused its attention on the total vehicle, which is reflected in the comprehensive requirement specification.

* The reduction of road resistances and the resulting increase in range plays a major role with electric vehicles. Lightweight construction was therefore a top priority for the Audi e-tron Concept car. The body, in particular, combines low weight with supreme strength and rigidity. An intelligent aerodynamics concept with active elements helps to reduce consumption.
* The package ensures the safe integration of the electric drive system and the battery. Placing the battery in front of the rear axle ensures an optimal axle load distribution without compromising the compact overall design and the generous amount of interior space.
* Advanced battery technology enables a practical range. The battery system is water-cooled for optimal performance and service life.
* A needs-based energy management system controls all functions for the chassis, convenience equipment and other auxiliary consumers.
* The innovative thermal management system with optimally matched cooling and heating components considers the cooling requirements of the battery and the drive system in addition to the interior temperature.
* Driving dynamics and road comfort are what Audi customers have come to expect in the sports car segment.
* Vehicle safety is on par with the best of today's production vehicles.
* The driver is provided with clear and comprehensive information.
* The Audi e-tron Concept car uses car-to-x communication technology developed by Audi to improve the efficiency of conventionally powered vehicles. For example, information about traffic light cycle times and the flow of traffic - provided by the infrastructure and other vehicles - is used to compute an optimal driving strategy. Audi has already modeled such a solution in Ingolstadt as part of its "travolution" project.

Design and Package
The caliber of the car is apparent to the observer at first glance. The Audi e-tron Concept has a wide, powerful stance on the road. The car body seems almost monolithic; the closed rear end appears powerful and muscular. The trapeze of the single-frame grille dominates the front end and is flanked by two large air intakes. The top of the grille merges into the flat strips of the adaptive matrix beam headlamp modules with their clear glass covers. High-efficiency LED technology is used for all lighting units - a matter of honor for Audi as the worldwide pioneer in this field.

The headlamps are the core of a fully automatic light assistance system that reacts flexibly to any situation. The new technology recognizes weather conditions and adapts the illumination to rain or fog. The technology at the heart of the light assistance system is a camera that works together with a fast computer to detect oncoming traffic, recognize lanes and measure visibilities, such as in the event of fog.

If there is oncoming traffic, for example, the high beams are turned off in the corresponding section of the illumination field. The cornering light system analyzes data from the navigation system and illuminates corners before the driver steers into them. The Audi e-tron Concept does not have conventional fog lamps that consume additional power. It instead intelligently varies the low beams to widen the illumination field, thus significantly reducing the glare from the car's own lights.

The variability of the headlamps is also reflected in their design. The LED elements change appearance and thus the character of the front end of the vehicle depending on the speed driven and the ambient conditions. The innovative lighting technology offers the Audi designers almost as much design freedom as the shape of the body does.

A new design element unique to the Audi e-tron Concept are the air intakes in the single-frame grille and in front of the rear wheel wells. They are closed flush under normal circumstances and opened by means of flaps when additional cooling air is required. Maximum efficiency is also the reason behind this measure. The concept car has a remarkably low drag coefficient, which gets even better when the flaps are closed.

The vehicle body is compact. The sweeping line of the front end and the flat curved roof immediately identify the two-seater as an Audi. The contours of the flanks are familiar. The tapering of the dynamic line above the sill and the shoulder line tie together the front end, the side and the rear, lend a plastic quality to the doors and the transition to the side air intake and sharply emphasize the Audi-typical round wheel wells with the large, 19-inch tires.

1.90 meters (74.80 in) wide, just 4.26 meters (167.72 in) long and 1.23 meters (48.43 in) tall - those are the proportions of a supercar. The wheelbase of 2.60 meters (102.36 in) leaves plenty of room between the axles for people and technology. Like with a mid-engined sports car, the cabin of the Audi e-tron Concept is shifted far forward toward the front axle, leaving room in front of the rear axle for the roughly 470 kilogram (1036.17 lb) battery unit, the inverter and the power electronics.

The two electric motors, which have their own cooling system, are mounted behind the rear axle. The front electric motors are mounted on the front axle, with their cooling system arranged in front of them. This special package, which features a 42:58 weight distribution, ensures perfect balance, which contributes to the driving dynamics of the Audi e-tron Concept.

Systematic lightweight construction is an even more important prerequisite for efficiency and range with electric vehicles than for conventionally powered automobiles. The Audi development engineers drew on the core competence of the company for the Audi e-tron Concept. The body structure is based on Audi Space Frame (ASF) technology and was realized as a hybrid construction. All add-on parts - doors, covers, sidewalls and roof - are made of a fiber-reinforced plastic.

The combination of aluminum and carbon fiber-reinforced composite material guarantees supreme rigidity coupled with low weight. Audi will soon use this technology in a similar form for production vehicles. Despite the complex drive system layout with four electric motors and a high-capacity battery system, the total weight of the Audi e-tron Concept is only around 1,600 kilograms (3527.40 lb).

Interior and Control Concept
Optical and functional references to the new drive concept characterize the interior design. They establish an advanced connection between proven Audi genes and new formal hallmarks. Typical for the Audi design language is the reduction of the architecture, controls and flow of information to the essential in favor of visible lightweight construction and a tidy overall impression.

The dash appears to float and has a curve that extends laterally into the door panels. With no need to allow for a transmission, shifter and cardan tunnel, the designers took advantage of the opportunity to create a particularly slim and lightweight center tunnel and center console. The flush gear selector, with which the driver chooses between the modes forward, reverse and neutral, emerges from the tunnel when the vehicle is started.

The cockpit of the Audi e-tron Concept is also oriented toward the driver - a further characteristic Audi trait. Instead of the classic instrument cluster, the concept car is the first Audi to be equipped with a large, fold-out central display with integrated MMI functions. It is flanked by two round dials.

The MMI is controlled via a scroll pad with a touch-sensitive surface on the steering wheel ("MMI touch") - an element inspired by modern smartphones.

While an analog speedometer on the right provides speed information, the instrument on the left tells the driver how much power is being drawn. The central display shows the range in the status bar and presents all key information from the infotainment and navigation systems. It also provides the driver with relevant data from the vehicle's communication with its surroundings. The instruments combine the analog and the digital worlds into a single unit.

Characteristic for the concept of the Audi e-tron Concept is the near total elimination of switches and small components such as the ignition. The climate control unit is located to the right above the steering wheel. The display provides temperature and ventilation information. Again drawing inspiration from a smartphone, the system is controlled by means of a touch-sensitive sliding control.

The racing-inspired lightweight bucket seats combine excellent lateral support with comfort. To contrasting colors - snow white and cognac - delineate the various zones of the interior. The colors and the high-quality materials combine elegance and sportiness.

Drive System and Energy Supply
Four asynchronous motors with a total output of 230 kilowatts (313 hp) give the Audi e-tron Concept the performance of a high-output sports car. The concept car can accelerate from 0 to 100 km/h (0 - 62.14 mph) in 4.8 seconds if necessary, and goes from 60 to 120 km/h (37.28 - 74.56 mph) in 4.1 seconds. The torque flows selectively to the wheels based on the driving situation and the condition of the road surface, resulting in outstanding traction and handling.

The top speed is limited to 200 km/h (124.27 mph), as the amount of energy required by the electric motors increases disproportionately to speed. The range in the NECD combined cycle is approximately 248 kilometers (154 miles). This good value is made possible by the integrated concept: technology specially configured for the electric drive system combined with state-of-the-art battery technology. The battery block has a total energy content of roughly 53 kilowatt hours, with the usable portion thereof restricted to 42.4 kWh in the interest of service life. Audi uses liquid cooling for the batteries.

The energy storage unit is charged with household current (230 volts, 16 amperes) via a cable and a plug. The socket is behind a cover at the back of the car. With the battery fully discharged, the charging time is between 6 and 8 hours. A high voltage (400 volts, 63 amperes) reduces this to just around 2.5 hours. The Audi engineers are working on a wireless solution to make charging more convenient. The inductive charging station, which can be placed in the garage at home or also in special parking garages, is activated automatically when the vehicle is docked. Such technology is already used today in a similar form to charge electric toothbrushes.

The battery is charged not only when the car is stationary, but also when it is in motion. The keyword here is recuperation. This form of energy recovery and return to the battery is already available today in a number of Audi production models. During braking, the alternator converts the kinetic energy into electrical energy, which it then feeds into the onboard electrical system.

The Audi e-tron Concept, which is slowed by four lightweight ceramic brake disc, takes the next large step into the future. An electronic brake system makes it possible to tap into the recuperation potential of the electric motors. A hydraulic fixed-caliper brake is mounted on the front axle, with two novel electrically-actuated floating-caliper brakes mounted on the rear axle. These floating calipers are actuated not by any mechanical or hydraulic transfer elements, but rather by wire ("brake by wire"). In addition, this eliminates frictional losses due to residual slip when the brakes are not being applied.

This decoupling of the brake pedal enables the Audi e-tron Concept's electric motors to convert all of the braking energy into electricity and recover it. The electromechanical brake system is only activated if greater deceleration is required. These control actions are unnoticeable to the driver, who feels only a predictable and constant pedal feel as with a hydraulic brake system.

Making its Automotive Debut: The Heat Pump
The heat pump - used here for the first time ever in an automobile - also serves to increase efficiency and range. Unlike a combustion engine, the electric drive system may not produce enough waste heat under all operating conditions to effectively heat the interior. Other electric vehicles are equipped with electric supplemental heaters, which consume a relatively large amount of energy. The heat pump used by Audi - and commonly used in buildings - is a highly efficient machine that uses mechanical work to provide heat with a minimum input of energy.

A high-efficiency climate control system is used to cool the interior. It works together with the thermal management system to also control the temperature of the high-voltage battery. The battery, the power electronics and the electric motors must be kept at their respective ideal operating temperatures to achieve optimal performance and range.

As soon as the vehicle is connected to a charging station the vehicle is preconditioned as appropriate by the thermal management and other associated systems.

The drive system is heated if temperatures are cool, and cooled if hot. This preconditioning can also be extended to the interior, if necessary, so that the passengers can step into a cabin that has been heated or cooled as appropriate for their comfort.

Driving Dynamics

The normal distribution of the tractive power is clearly biased toward the rear axle in accordance with the weight distribution of the Audi e-tron Concept. Similarly to a mid-engined sports car, roughly 70 percent of the power goes the rear and 30 percent to the front. If an axle slips, this balance can be varied by means of the four centrally controlled electric motors. The electric vehicle from Audi thus enjoys all of the advantages of quattro technology.

The four individual motors, which in the interest of greater traction are installed behind the wheels as wheel drives, also enable the Audi e-tron Concept's lateral dynamics to be intelligently controlled. Similar to what the sport differential does in conventional quattro vehicles, torque vectoring - the targeted acceleration of individual wheels - makes the Audi e-tron Concept even more dynamic while simultaneously enhancing driving safety. Understeer and oversteer can be corrected by not only targeted activation of the brakes, but also by precise increases in power lasting just a few milliseconds. The concept car remains extremely neutral even under great lateral acceleration and hustles through corners as if on the proverbial rails.

The chassis has triangular double wishbones at the front axle and trapezoidal wishbones made of forged aluminum components at the rear axle - a geometry that has proven in motorsports to be the optimal prerequisite for high agility, uncompromising precision and precisely defined self-steering behavior. A taut setup was chosen for the springs and shock absorbers, but it is still very comfortable.

The direct rack-and-pinion steering gives finely differentiated feedback. Its electromechanical steering boost varies with speed, so that the Audi e-tron Concept only has to provide energy while steering, and not while driving straight ahead.

As befitting its status, the Audi concept car rolls on 19-inch tires with a new blade design. 235/35 tires up front and 295/30 tires in the rear provide the necessary grip.

Car-to-x Communication

The electronics development engineers at Audi not only aimed to make the Audi e-tron Concept as efficient and fun to drive as possible, they were also very concerned with safety and traffic management. The technical concept car includes a prototype of an information processing system. Future generations of these systems will usher in a new era in the networking of road traffic, particularly in regions and countries with a high volume of traffic. This progress is made possible by the rapid advancements in computing power, software and communication technology.

The buzzword "car-to-x communication" refers to the direct exchange of information in flowing traffic and to the traffic environment. The letter "x" is a free variable that can refer just as easily to other vehicles as to fixed infrastructure such as traffic lights. In contrast to today's telematic systems, car-to-x communication no longer requires a central service provider to quickly and effectively pool and process information. The participants themselves perform these tasks by spontaneously networking with one another.

The future car-to-x network still needs some time before it becomes reality on the roads. This obstacle is one that can be overcome, however, as nearly every carmaker in Europe, the U.S.A. and Japan has decided to develop a common standard for hardware and software. Once all new cars are equipped with this technology, a functional network of automotive transmitters will soon be available, at least in large population centers.

These transmitters can be used to open up many new practical applications. Below are just four examples showing the possibilities offered by car-to-x communication.

Example 1 - Efficiency and range: Numerous external factors influence energy consumption and thus the range of any vehicle. An intelligent vehicle equipped with car-to-x technology is aware of necessary braking or acceleration maneuvers in advance because it combines navigational data with information about the flow of traffic, for example. The central computer can prevent driver actions that would use energy unnecessarily or use targeted braking for recuperation of the battery.

Example 2 - Safety: A vehicle has spun out on a slippery road in a blind curve and is unable to free itself under its own power. At the same time, other vehicles are approaching quickly. The stuck vehicle uses car-to-x to send out a warning signal reporting the precise location of the hazardous location. A corresponding warning then appears on the navigation system display of the approaching cars.

Example 3 - Traffic flow: Many cars are traveling between traffic lights on an arterial road. Over and over again, they accelerate only to have to brake again when the traffic light changes to red. Car-to-x technology enables them to establish a network between themselves and receive information from the traffic light controller. The drivers can then make more judicious use of the gas pedal because they know what to expect. The same applies for imminent traffic jams: cars ahead provide information that results in adjustments to the posted speed limits, noticeably spreading out the traffic.

Example 4 - Convenience: The driver has entered a shopping center with a chronic shortage of parking spaces into his navigation system as the destination. With car-to-x, the mobile system networks with the parking space registration system at the destination. When the system in the parking garage reports that a convenient parking spot is available, the navigation system can register its location and also reserve the spot.

Audi A5 Cabriolet

The top-of-the-line model of Audi's new family of convertibles is the Audi S5 Cabriolet. The engine of the S5 Cabriolet is the newly developed, supercharged three-liter V6 with gasoline direct injection.

Like all open-top Audi models, the new Audi A5 Cabriolet too has a classic fabric top - which endows it with a striking silhouette of dynamic elegance. The lightweight softtop opens in 15 seconds - and closes in 17 seconds. The fully automatic open/close drive comes as standard. An acoustic top is optionally available, which reduces wind noise almost to the hardtop level.
When opened, the Audi A5 Cabriolet top folds down so effectively that very little trunk space is used up - leaving 320 liters (11.3 cu ft) of unused storage volume, clearly the best value in its field of competitors. The softtop compartment lowers itself automatically when the top is opened.
Equally useful is the fold-down rear seat backrest with the large pass-through between the luggage space and the interior, which increases the storage volume to a generous 750 liters (26.49 cu. ft.).
Automatic seat belt extenders round out the comfort in the interior. Neck-level heating is optionally available for the front seats. The optional leather seats are coated with a special layer to reduce solar heating. There is comfortable room for four persons. The refined ambiance combines with exemplary ergonomics to convey an atmosphere of sporty elegance. Ultra-high-strength steels and selective reinforcements of the body ensure maximal rigidity and crash safety.
The Audi A5 Cabriolet is being launched with three gasoline engines and two diesel engines, with power outputs ranging from 132 kW (180 hp) to 195 kW (265 hp). All five powerplants are fueled via direct injection; four of them use turbocharging. Available power trains include a six-speed manual transmission, the continuously variable multitronic, and the lightning-fast, seven-speed S tronic.

The Audi drive select:
The perfect addition to this technology package is the Audi drive select vehicle dynamics system, which enables the driver to chose among three different engine maps controlling the characteristics of the fuel feed, the shifting points of the seven-speed S tronic and multitronic, and the mode of operation of the servotronic steering system.
Audi drive select is combination with one or more of three additional technologies - the sport differential, the adaptive control for the shock absorbers, and dynamic steering. This is an additional high-tech solution: Its superposition gear varies the gear ratio as a function of the driving speed by up to 100 percent.
The new Audi A5 Cabriolet features a rich array of equipment, including 17-inch alloy wheels, automatic air conditioning, and an audio system with a CD player. One of the highlights among the optional equipment is the third-generation MMI operating system, which provides many attractive navigation and entertainment functions.
As the dynamic top-of-the-line model of the new production series, the Audi S5 Cabriolet occupies a very special position. Its three-liter TFSI - a V6 with turbocharger - unfolds its 245 kW (333 hp) and 440 Nm (324.53 lb-ft) of torque impressively: It responds tenaciously to the throttle and delivers excellent driving performance. The quattro drive, a sport suspension with 18-inch wheels and a number of special equipment details underscore the athletic power of the Audi S5 Cabriolet.

The exterior design
The Audi A5 Cabriolet combines Audi's progressive styling with the fascination of an open-top car. The long engine hood, the sharp lines, the sweep of the shoulder contour, the elegantly curved surfaces, the large wheels, the distinctive front end, and the expressive tail all interact to create a sculptural, sensuous whole. The Audi A5 Cabriolet is 4.63 meters (15.19 ft) long and 1.85 meters (6.07 ft) wide, but only 1.38 meters (4.53 ft) tall: the sportiest proportions in its class.
The styling of the front end is dominated by the single-frame grille, which is flanked by large air intakes. The exquisite design of the headlights makes them look like technical jewels. The daytime running lights of the optional xenon plus headlights consist of LEDs. An aluminum molding lends high gloss to the windshield frame.
The looks of the tail end are sharpened by horizontal lines, broad tail lights, straight tailpipes, and a distinctly colored diffuser insert. The trunk lid bears an unobtrusive spoiler lip. The xenon plus headlight option comes complete with LED taillights, which create a distinctive light pattern.

The convertible top
The fabric top with the large glass rear window fits smoothly into the design profile. This is one of several reasons why Audi preferred it to a folding steel roof. What's more, its construction is much lighter in weight, which reduces the overall weight of the Cabriolet and lowers its center of gravity. The outer skin of the top is available in a choice of four colors, the inside in three.
The softtop consists of three layers. The intermediate layer is a cushioning pad. In the optional acoustic top, which reduces wind noise almost to hardtop level, this is replaced by a foam layer up to 15 millimeters (0.59 in) in thickness. The acoustic top comes with a ceiling light for the rear seat - a solution usually only found in the topmost convertible luxury segment.

The body
As is typical of Audi models, the A5 Cabriolet has an extremely rigid body. This is a prime reason for its precise driving performance, its high comfort level, and its maximized crash safety.
In the construction of the body-in-white, several innovative technologies are used. A prime example are the ultra-high-strength steels with their extremely high tensile strength, which Audi manufactures in-house using hot forming. The front fender of the Audi A5 Cabriolet are made of aluminum to lower the weight and to optimize axle load distribution. An enclosed underbody improves the airflow and thereby the fuel efficiency.
A whole array of additional reinforcement parts compensates for the absence of a solid roof. They are located in the front section, in the side skirts, in the windshield frame, and in the rear section. Located between the interior and the luggage section is the rollover protection. When a rollover threatens, spring-loaded aluminum braces are raised behind the rear seat headrests. Door-mounted head and chest sidebags provide protection in the event of a lateral impact.

The interior
With its generous wheelbase of 2.75 meters (9.02 ft) and the longest interior in its class, the Audi A5 Cabriolet has plenty of room for longer trips. That's also true for the rear seats, which can be optionally divided by a center console with two cup holders.
Elegance in flowing lines, functional ergonomics, and top-quality craftsmanship are the principal characteristics of the interior - and this too is typically Audi. The teardrop-shaped settings of the instruments have already become modern classics. The centrally mounted onboard monitor is standard equipment. The formed-plastic console focuses on the driver. Flowing lines link it to the central tunnel and the door linings. If the customer has ordered either one of the two navigation systems it comes with the highly convenient MMI operating system - the best solution on the market.
The low standard seats provide excellent control and support. Using seatbelts is facilitated by electric seat belt extenders. Special solutions are available as alternatives: firm sport seats, electric seat adjustment and heating - as a separate option also for the back seats.
In the climate-controlled comfort seats, small fans and an automatic auxiliary heater ensure luxurious comfort. This option provides neck-level heating - ducts on the topside of the seatback emit warm air that keeps the back of the head and neck warm. With its three-level control, the headroom heater is also available for sport seats. It prolongs the open-air season in the Audi A5 Cabriolet.
Another special feature is provided in the optional leather upholstery: a special coating inhibits solar heating while the Cabriolet is parked in the sun with the top down. This coating reflects infrared radiation and thus lowers the surface temperature by up to 20 degrees Celsius. Audi offers a choice of several seat coverings up to and including Fine Nappa leather. Inlays come as standard in Micrometallic platinum; aluminum and three different kinds of wood are available as options.

The engines
In the propulsion system of the A5 Cabriolet too Audi has consistently relied on innovative technologies: All five engines - the two TDIs and the three gasoline engines - use direct injection. They are impressive evidence that, at Audi, efficiency and dynamics go together and are interdependent.
The most powerful gasoline engine in the Audi A5 Cabriolet is the 3.2-liter FSI. It operates with the innovative Audi valvelift system, which varies the lift of the intake valves in two stages. As a result, the gas exchange improves and the throttle can be left open more often, minimizing throttling losses - which in turn boosts the torque and the power output while reducing fuel consumption. The V6 delivers up to 195 kW (265 hp) as well as 330 Nm (243.4 lb-ft) between 3,000 and 5,000 rpm. With front-wheel drive and multitronic it accelerates the Audi A5 Cabriolet in 6.9 seconds to 100 km/h (62.14 mph) - and up to a top speed of 246 km/h (152.86 mph). Its average fuel efficiency is an impressive 8.6 liters/100 km (27.35 US mpg). An optional alternative is quattro all-wheel drive, combined with the new seven-speed S tronic.
The 2.0 TFSI likewise attests to Audi's leadership position in engine design. This four-cylinder engine also uses the Audi valvelift system - but here it acts on the exhaust valves, with similar advantages as in the V6. Audi sells the two-liter turbo in two versions. In the entry-level version, which comes with front-wheel drive and multitronic, it delivers up to 132 kW (180 hp) and 320 Nm (236.02 lb-ft) from 1,500 to 3,900 rpm. This version completes the standard sprint in 8.9 seconds and has a top speed of 219 km/h (136.08 mph). Average fuel efficiency is an excellent 7.4 liters per 100 km (31.79 US mpg).
The more powerful version of the 2.0 TFSI delivers 155 kW (211 hp) as well as 350 Nm (258.15 lb-ft) between 1,500 and 4,200 rpm. It is available with three powertrain versions: with the quattro drive package and the seven-speed S tronic, and with front-wheel drive and either multitronic or manual transmission. In the latter version the Audi A5 Cabriolet reaches 100 km/h (62.14 mph) in 7.5 seconds and has a top speed of 241 km/h (149.75 mph). Its average fuel efficiency is an impressive 6.8 liters per 100 km (34.59 US mpg).
The two V6 TDIs also set the standards in their class. With their enormous torque and consistent running smoothness they represent the leading-edge sportiness of Audi TDI technology. The three-liter engine generates 176 kW (240 hp) and applies 500 Nm (368.78 lb-ft) of torque to the crankshaft between 1,500 and 3,000 rpm. The sprint from zero to 100 km/h (62.14 mph) takes 6.4 seconds. Top speed is 247 km/h (153.48 mph). This top-of-the-line diesel, which powers all four wheels via the seven-speed S tronic, is content with an impressive average of 6.8 liters/100 km (34.59 US mpg).
The second TDI in the program is even thriftier. The 2.7-liter powerplant with 140 kW (190 hp) and 400 Nm (295.02 lb-ft) between 1,400 and 3,500 rpm consumes a mere 6.3 liters/100 km (37.34 US mpg). The smaller V6 diesel comes with front-wheel drive and manual transmission. It goes from zero to 100 km/h (62.14 mph) in 8.6 seconds; 230 km/h (142.92 mph) is its top speed (preliminary values).

The transmission
Audi provides a choice of three different transmissions for the Audi A5 Cabriolet. The 2.0 TFSI with 155 kW (211 hp) comes with a six-speed manual transmission as standard, which excels in its short shifting travels and high operating precision. Both the two-liter engine and the 3.2 FSI are available with the multitronic continuously variable automatic transmission as an option, which combines smooth operation with high efficiency and a fuel-saving transmission ratio. For a dynamic driving style the multitronic is available with a sport program and a manual mode with eight fixed speeds.
For the more powerful version of the 2.0 TFSI and for the 3.2 FSI, the seven-speed S tronic is available as an option; in the 3.0 TDI it is standard equipment. This new high-tech dual-clutch transmission changes gears in a few hundredths of a second, and so smoothly that the driver hardly notices it. What's more, it is highly efficient and fuel-saving. The driver can let the seven-speed S tronic shift automatically or interact, if desired, via rocker switches on the steering wheel.

The seven-speed S tronic has been designed for use with the quattro permanent all-wheel drive. It is optionally available for the high-end diesel series and for the two powerful gasoline engines. The quattro drive system is dynamically designed - during normal driving it distributes the forces in a 40:60 ratio between the front and the rear. If one wheel skids, a center differential that operates purely mechanically transfers most of the power to the axle with the better traction.
The new sport differential makes the driving dynamics of the quattro drive even more fascinating. This innovative control system steplessly distributes the propulsive torques among the rear wheels depending on the driving situation.

This form of torque control makes the steering response of the Audi A5 Cabriolet even more spontaneous and direct and further improves the vehicle's stability. Transverse acceleration is further improved while understeering or oversteering is completely prevented.

The chassis
The Audi A5 Cabriolet leads its class in all relevant sporty criteria - steering response, stability and agility - yet it provides a very smooth ride. The reason for these strengths is the perfect distribution of axle loads. The front axle is located far forward in the front section - a configuration made possible by an unusual solution: the differential is mounted in front of the clutch or torque converter.
The chassis design too is technologically advanced: The front wheels are mounted on a five-link axle. The front axle support is firmly bolted to the body in order to maximize rigidity. The steering forces are transmitted to the wheels directly via the steering box, which is mounted very low within the chassis. The hydraulic rack-and-pinion steering provides a very responsive and highly precise connection to the road. Optionally available is the servotronic, which adjusts its support level to the driving speed.
The rear-wheel suspension of the Audi A5 Cabriolet is supported by a trapezoidal-link axle, which combines a smooth ride and maximum driving stability. The essential parts of both the front and the rear suspension are made of aluminum. The large brakes ensure powerful deceleration and react very precisely to the degree of pedal pressure. 16-inch or 17-inch aluminum wheels are standard, depending on the engine version. Optionally available from Audi and quattro GmbH are 18-, 19- and 20-inch wheels.

Another high-tech feature in the new Audi A5 Cabriolet is the Audi drive select vehicle dynamics system. It influences the characteristics of the fuel feed, the speed change points of the seven-speed S tronic, and the operating mode of the servotronic steering system. The driver presses a key to select a comfortable, intermediate, or dynamic operating mode for these subsystems. If the vehicle is equipped with a navigation system - and the MMI operator control that comes with it - a fourth engine map is provided, which the driver can program to suit.
The innovative assistant systems from the luxury class make driving in the Audi A5 Cabriolet even more supremely relaxed. Audi optionally equips its open-top four-seater with high-tech solutions including adaptive cruise control, Audi side assist and Audi lane assist. They control the distance from the vehicle in front and assist in staying in lane or in changing lanes. The luxury-class Audi parking system advanced uses a rearview camera to display the area behind the vehicle on the onboard monitor.

The Audi S5 Cabriolet
The top-of-the-line model of the new Cabriolet production series from Audi is the S5 Cabriolet. The letter "S" stands for Sport - for dynamics, performance and power, but also for amazing efficiency.

The Audi S5 Cabriolet's engine is a newly developed, supercharged, three-liter V6. The pressure in the 3.0 TFSI is generated by a mechanical supercharger - with impressive results: The power output tops out at 245 kW (333 hp), the torque between 2,900 and 5,300 rpm remains constant at a generous 440 Nm (324.53 lb-ft). The powerful thrust and the spontaneous, aggressive response make for a fascinating driving experience. The Audi S5 Cabriolet is catapulted in 5.6 seconds from zero to 100 km/h (62.14 mph) and accelerates up to a preset top speed of 250 km/h (155.34 mph). Yet at 9.6 liters per 100 km (24.5 US mpg), its fuel efficiency is highly impressive (preliminary values).

Diverse design features contribute to a distinctively sporty styling, including modifications at the lower front and back panels, at the air intakes and at the tailpipes. In the interior, special seat upholstery, door sill trims and inlays in matt brushed aluminum underscore the high-quality, dynamic style of the high-end model. The pointers of the instruments are illuminated white to contrast with the gray scales.

Audi : R8 European First Drive

We drive Audi's new supercar in the south of France “Damn,” I think. “I really must get some of those noise-cancelling headphones.” I’m on a plane, you see, desperately trying to watch – and listen to – Audi’s hard disk-based presentation on the R8. And then I realise the problem: the otherwise-slick vid, all 11 minutes of it, actually contains only one sweep past the camera without voiceover or soundtrack. Just one. Which means a total of, ooh, three seconds of engine noise?
It makes me suspicious, for we like the R8’s engine. At least, we like it in the RS4. So the prospect of something which looks this good with that 4.2-litre V8 mid-mounted has made us quite excited; impatient, even. I hand back the Archos box and resign myself to another hour of waiting.
R8 generates plenty of lateral gripThis is our first chance to sample Audi’s supercar on European terrain, and the deserted D- and N-roads around Le Castellet are a pretty fair representation of what a British B would throw at the R8. There are bumps, broken asphalt, even Irish-style gravel at junctions.
This would normally pose a problem for Audi, because while it has a fair history of making belting engines, its chassis have frequently fallen short of their potential. The S-Line range, in particular, seems to be devoted to people with no liking for suspension whatsoever. So if the R8 is to succeed – if it is to stand any chance against Porsche’s 911 (at which it is squarely aimed, let’s face it) – then Audi has to prove that it can produce a chassis that’s both pliable and exploitable.
The engine certainly deserves that. Barely an hour and five seconds after my mid-flight drama, I get the chance to open up that V8 and the result is… just a little underwhelming. Cue another panic attack: I’m not saying the in-cabin sounds aren’t delightful, it’s just that they’re a little, well, refined. And we don’t want refinement, in that area at least. We want the R8 to be the defining moment of this engine. We want kids in the Bogota School for the Hard of Hearing to ask what all the noise is when you find a stretch of empty road. In Yorkshire.
V8 is dry sumped - unlike RS4It’s time to open the windows, then feel the noise. And it works. Somehow, a bit of exhaust reverb makes all the difference here. There’s no doubt that Audi has made the V8 a little peaky to extract that 414bhp, and the engine– aurally and in performance terms – feels a tad sleepy beneath 4000rpm. Thereafter, however, it becomes visceral - a thudding, angry brute screaming for the red line with force, but never losing the oily smoothness its cutting edge technology affords it. It’s great, in other words.
And the handling? Think ‘safe’ and you won’t go far wrong. I guess that while the 911 has a history of being a bit of an animal, and therefore has to deliver at least part of that to live up to its reputation and to excite its core fans, the R8 can fall back on Audi’s motorsport history, which to most of us is based on Quattros running rings around two-wheel-drive cars. Accordingly, don’t expect to squeeze the throttle and bring the rear around to aid turn-in, because this is a car that prefers to grip solidly – mightily in fact - and simply go where it’s pointed. The steering is direct and the R8 certainly finds apexes better than any front-engined Audi (perish the thought that it wouldn’t) but it doesn’t offer much in the way of genuine feel as to what’s happening down at road-level. Overall, the interaction and sense of adjustability found in the most exploitable and rewarding sportscars is not quite there, but at the same time, what considerable fun there is to be had is easily accessible.
Another superb Audi interiorIs that a problem? For the 1200 people who’ve pre-ordered the R8, clearly not. At least the ride is on a par with the RS4: even with the magnetic ride option set to ‘sport’, it’s comfortable enough to cruise along on motorways, yet agile and pliable enough for fairly bumpy B-roads.
The whole process is helped by a decent manual ‘gate’ six-speed gearbox which is a little notchy, perhaps, but quick enough, once you get your bearings. And if the thought of heeling and toeing fills you with dread (and a warning, the Audi’s brake pedal is so aggressively servo-ed that even a mid-eighties F1 driver would struggle), the R-tronic sequential automatic gearbox will make equally rapid (if slightly more brutal) upchanges, then blip for you on the way back down.
Does that sound like a kop-out? Perhaps it is. And yet, an ‘easy’ way of looking good is exactly what this car is all about. The R8 is a creation that successfully breaches the gap between head-turning, street-stopping supercar looks, and the usability and dependability of the 911. Which is no small achievement. Combine that with an exquisite interior which feels like it could survive an assault from the Brentford ASBO Society, and the case for the R8 gets ever stronger.
R8 has decent ride quality tooWhen all’s said and done, this is probably the best Audi since the original ur-Quattro, which means ever. Does it match a 911 for tactile driving brilliance? Probably not. But it runs in a damn close second, and the rest of the package – those looks, a bizarre amount of practicality and an interior that Stuttgart simply can’t match – make a very persuasive argument over the old stager. It surprises me not one jot that Audi cannot keep up with initial demand.
Indeed, my only real gripe is that the R8 suffers from a bit of a self-consciousness complex, as if someone in Ingolstadt felt it had a little too much going for it in the looks department and decided not to make 100 per cent use of that engine’s aural brilliance, so as not to appear cocky.
Personally, I think it should stand up and shout about it. Something this good deserves to be seen and heard. By everyone, if possible.

ABT Audi AS5

The new Audi A5 combines a sporty and an unobtrusive design to a powerful, elegant and individual appearance. "A uniquely beautiful car and thus a real challenge for us," says Hans-Jürgen Abt. The managing director of Abt Sportsline raved about the new Coupe from Ingolstadt, but he emphasizes that "our designers and engineers were able to improve the outstanding base model even more". The character of the noble sportscar still maintains but after getting a special treatment in the Allgaeu it appears more dynamical. The body kit, especially tailor-made for the Abt AS5, is a spectacular package: a front skirt with a grid element which emphasizes the singel-frame grill and the fog lights, the slightly curved, laterally mounted body parts and the sleek gill-shaped air-inlets, as well as the well-proportioned rear. With the unobtrusive but striking rear spoiler and the rear skirt inset in diffuser optics, the design of the Abt AS5 is gracefully rounded off. The 4-pipe rear muffler is perfectly fitting and additionally recontoures the rear view. Needless to say that the car sounds as a real Abt car should.

Even when standing still, the Abt AS5 is a sensual car, which eagerly wants to be driven. And when it is allowed to go on the road, it shows how much sports spirit it has. First of all, the 3.0 TDI engine gets a significant "power treatment". The extremely powerful, self-igniting engine perfectly fits to the A5 and, in addition, offers moderate consumption values. By means of improved motor management, Abt turns the serial 240 hp (176 kW) into powerful 272 hp (200 kW). With an extra Abt turbo charger, the power even increases to 300 well feeded horses. Diesel and sportiness belong together since long. Certainly, Abt Sportsline will successively modify later developed A5 engines.

To ensure a perfect handling of the noble power package, Abt also makes use of its adjustable sports suspension, besides the serial Quattro engine. All the more, the Abt AS5 will be brought to a standstill by means of the Abt brake system with a disc diameter of 380 millimeters.

Audi R8 V10 5.2 FSI quattro