The 2015 Audi S4 is an all-wheel-drive sports sedan that is the performance variant of the A4. Its sole powertrain is a supercharged 3.0-liter V-6 with 333 hp and 325 lb-ft of torque paired to a ...

The 2018 Audi S4 is the performance variant of the A4 sedan, and it comes standard with all-wheel drive. S4 Premium Plus: The base Premium Plus trim comes standard with 18-inch alloy wheels ...