Understated almost to the point of anonymity, the S4 is the mid-level performance version of the Audi A4 saloon. Swapping between twin-turbocharged, supercharged V6 and even a naturally aspirated ...

The new 2018 Audi S4, while slightly larger than even the previous ... Audi has gone back to its V6 turbocharged roots. The turbocharger is a twin-scroll design with separate exhaust branches ...

Showing the 2018 Audi S4 3.0 TFSI Premium Plus quattro AWD $2,580 Starting MSRP $1,250 Starting MSRP $2,600 Starting MSRP $2,600 Starting MSRP $950 ...