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| 2011 audi r8 spyder |
The body of a sports car needs to be particularly light and rigid: low weight permits superior road performance, and rigidity is the crucial starting point for an agile driving feel allied to high precision. The Audi Space Frame body, made from aluminium, provides the ideal basis for this. Audi has more expertise than any other manufacturer worldwide in the designing and production of cars based on aluminium technology, and has channelled its accumulated know-how into the R8.
The entire bodyshell of the R8 weighs just 210 kilograms, the pinnacle of achievement among sports cars in terms of lightweight design quality. It comprises extruded sections, aluminium panels and highly complex cast nodes, joined together by 99 metres of weld seams, 782 punch rivets and 382 self-tapping screws.
Superlative precision in the production shop
This structure is created largely by hand at the R8 production shop in Neckarsulm, but with precision measuring and machining methods keeping a watchful eye over the whole business: a laser measuring system checks 220 points on each body to within one-tenth of a millimetre, and a special computer tomograph can investigate the absolute quality of every join with micron precision. A central processing plant cuts and drills all 52 connecting points on the running gear and steering in a single pass. This assures maximum precision in the axle geometry.
The aerodynamics experts at Audi have done their work so thoroughly on the R8 that, as an added benefit of its elegant shape, the body actually produces a downforce - unlike many other sports cars. This promotes directional stability at high speeds. It is achieved by means of the extending rear spoiler, but above all thanks to the fully clad diffuser underbody.
Enormous propulsive power across wide speed range
The heart of the sports car is of course the engine. As well as being exceptionally compact, the eight-cylinder power unit of the R8 runs lustily and effortlessly up to very high engine speeds, peaking at 8,250 rpm. The reward is 420 bhp and an even buildup of torque that produces enormous propulsion across a wide range of engine speeds. The engine's dry sump lubrication, typical of a race engine, permits a particularly low installed location and assures a constant oil supply in even the toughest of driving conditions - for instance on a racetrack. And the FSI direct injection underpins the very good full-load performance with a highly efficient combustion process.
The road performance is correspondingly impressive: the R8 dashes from 0 to 100 km/h in just 4.6 seconds, whether with manual gearbox or with R tronic sequential gearshifting. The needle hits 200 km/h after only 14.9 seconds, and the engine's propulsion is only finally held in check by rolling resistance and drag at 301 km/h.
However, the captivating character of the V8 stems not just from its effortless propulsion, but equally from its ample, versatile sound characteristics. Thanks to ingenious fine-tuning measures, Audi's engineers isolated disagreeable frequencies and then orchestrated an impressive opus from the intake and exhaust sound.
Lightning start thanks to Launch Control
The R8's transmission comes with six well-spaced ratios that can be operated either manually, in conjunction with the clutch, or automatically via the R tronic. The R tronic is an entirely new development that operates faster than even the most adept of drivers and offers racing-style thrills with the shift paddles on the steering wheel. The R tronic accomplishes lightning-fast starts worthy of the racetrack thanks to Launch Control.
The quattro permanent four-wheel drive provides that decisive extra dose of traction and driving safety. The system was adapted to the mid-engine concept, with its ideal axle load distribution of 44:56 percent, and directs between 10 and 35 percent of the engine's power to the front wheels as necessary.
Precision suspension provides safety boost
The precision suspension of the Audi R8 remains supremely in control of the sporty performance, but is equally capable of assuring relaxed driving pleasure over long distances. The sports car obeys steering movements with spontaneous agility, always demonstrating exceptionally good driving safety. The suspension, with double wishbones at both the front and rear, is optimised for a neutral self-steering response and maximum ease of control.
A particularly innovative damping technology is available for the R8 as an option: Audi magnetic ride adapts the suspension characteristic to the profile of the road and the driver's style within milliseconds. A generously-dimensioned brake system supplies the necessary braking force. It applies a total of 24 pistons to the four studded brake discs. This braking performance can only be topped by the optional ceramic discs. They are even capable of withstanding the rigours of racing-style use.
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| 2011 audi r8 spyder |
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| 2011 audi r8 spyder |
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| 2011 audi r8 spyder |
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| 2011 audi r8 spyder |
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