The Audi S4 is a great car. The one car that can come close to this car is the BMW M3. In my opinion the S4 is the better of the two and it helps out your wallet. The S4 packs a 2.7 V-6 twin-turbo engine that pumps out 250hp and does 0-60 in 5.5sec. The M3 has a 3.2 V-6 that creates 240hp and also does 0-60 in 5.5sec. The S4 comes with quattro(Audi's form of calling their four wheel drive system) a big help when it comes to different conditions that might be in your way. The M3 works on a rear-wheel drive. The last thing that stands out on the S4 is the six-speed manual gear box. While on the other hand the M3 has just 5 gears. Overall I think the better car of the two is the S4.