I was with my dad at this drive and ride sponsered by his company where you could drive cars. I drove the S4 and all i can say is amazing. It pulls off the line like nothing else. The quatro just grips and it handled amazing. I was driving through turns on the track at insane speeds but still felt amazingly well controled. Only one car that day toped the S4 and that was the VW R32. Though less powerfull I felt more at home in that car and it is much more resonably priced. I also liked the A6 S-line. The S4 beat out much more expensive car there including the MB S55 AMG wotn 496hp. The thing i liked the most about the Audi and VW products also including the V8 pheaton i drove was the quatro!