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Numerous technical achievements – many of which hail from motorsport – give the new Audi RS 4 its unique class and character. These features include the high engine speed concept now being introduced for the first time in a production Audi, innovative FSI technology, as well as the latest generation of quattro drive with asymmetric/dynamic distribution of torque. Developing a maximum output of 420 bhp, the V8 revs up to a speed of 8250 rpm. With its displacement of 4163 cc, this outstanding engine exceeds the magical barrier of 100 bhp per litre truly outstanding in a production saloon. Maximum torque of 430 Nm comes at 5500 rpm in this very compact engine, with 90 per cent of the engine’s torque consistently available between 2250 and 7600 rpm. The result is excellent muscle and pulling force at all times, enabling the driver whenever he – or she – wishes to drive in truly relaxed style without frequent gear changes. Audi has chosen its trendsetting and groundbreaking FSI technology for the RS 4 saloon, direct gasoline injection ensuring even more effective combustion of the fuel/air mixture and, as a result, an even better power yield. This is matched by the highly responsive development of power, the RS 4 accelerating to 100 km/h in 4.8 seconds and reaching 200 km/h in 16.6 seconds. Top speed is cut off electronically at 250 km/h. Audi’s FSI technology has already proven its qualities impressively in Audi’s four-time Le Mans winner, the Audi R8. A further essential point in the brief given to Audi’s development engineers was to optimise the car’s power-to-weight ratio, avoiding every superfluous gram on the Audi RS 4. Accordingly, virtually every component was checked and cross-checked for minimum weight. The front wheel arches and the engine compartment lid are therefore made of aluminium, just like most components on the chassis and suspension. The specially designed RS bucket seats, in turn, are not only very light, but also offer extremely good body support in every situation. The result is a power-to-weight ratio of just 3.93 kilos per bhp – a figure truly reminiscent of a thoroughbred sports car, which would not even have been conceivable just a few years ago in a midrange saloon. |
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