The Audi A4 and S4 are a compact luxury sedan ... while it's finely crafted interior is practically dripping with quality. A supercharged V6 in the S4 brings an impressive level of performance to a ...

the S4 is the mid-level performance version of the Audi A4 saloon that’s seen more heart transplants than Addenbrooke’s Hospital. It’s swapped between twin-turbocharged and supercharged V6 ...