This sleeper sedan is a high-performance variant of the more middle-of-the-road A4 line. The Audi S4 comes standard with quattro all-wheel drive and a few visual enhancements to set it apart for true sports car enthusiasts. Base Price: $49,800 Engine: 3.0-liter supercharged V6 Horsepower: 333 0-60 mph: 4.9 seconds