The 2008 Audi S8 is a 4-door, 5-passenger luxury sports sedan, available in one trim only, the Sedan. Upon introduction, the S8 is equipped with a standard 5.2-liter, V10, 450-horsepower engine that achieves 13-mpg in the city and 19-mpg on the highway. A 6-speed automatic transmission with overdrive is standard.
