The Audi S4 (B9) delivers serious performance, luxury, and everyday usability—but is it so good that you don’t even need an RS4? Join me for my first drive as I put this sports sedan to the test!

The biggest news on the B9 S4’s launch was the switch from supercharged to turbocharged technology, plus the adoption of an eight-speed automatic gearbox instead of the previous car’s dual ...

Prices shown for the used 2010 Audi S4 Sedan 4D Quattro Prestige with NaN miles are what people paid to buy this vehicle or what people received when trading in this vehicle at a dealer. Edit options.

Prices shown for the used 2015 Audi S4 Sedan 4D S4 Prestige AWD with NaN miles are what people paid to buy this vehicle or what people received when trading in this vehicle at a dealer. Edit options.