My buddy had an s4 with the bi-turbos... Had alot of work done on it at a shop in naperville that specialized in euros...

Sweet car , very fun... Always took me off the line but i was able to catch him around 55 mph. He would put a half a car on me from the jump it would take most of second gear to make that up... By 3rd i was putting it down on him. Id have a car on him by 85- 90 mph...
Thats still some serious power out of a six with an auto and a very hi-tech awd system. Nothing but respect for the audis....