The 2008 Audi RS4 is a 4-door, 5-passenger luxury sports sedan, available in one trim only, the Sedan. Upon introduction, the RS4 is equipped with a standard 4.2-liter, V8, 420-horsepower engine that achieves 14-mpg in the city and 21-mpg on the highway. A 6-speed manual transmission with overdrive is standard.
