The RS4, and Audis in general, are sweet rides and well designed cars. My highest props go to BMW because unlike Audi, VW, M-B, and Porsche, they don't resort to turbos or superchargers to get more horsepower. Like the fine engineers at Ferrari, they simply engineer a better engine. Anyone can put bi-turbos on a Ford Focus and get 300+ HP and a fast car but that's the easy way out