The Audi S4 is what some car nuts call a q-ship, an unassuming-looking vehicle that packs surprising performance. Of course, it's kind of Audi's calling card to wrap sleek, nicely tailored sheet metal around a car you wish you could take to Nurburgring racetrack in. Based on the
A4, the S4 adds power and chassis tweaks to a small sedan that offers refined performance and space for four in a tech-intensive cabin.