Audi 90 quattro IMSA GTO: the five-cylinder that won seven races, lost the title and went home
Audi 90 quattro IMSA GTO: the 720 hp turbo five-cylinder, all-wheel-drive tube-frame racer that won seven IMSA races in 1989 after Trans-Am banned the 200 quattro, lost the title and left for the DTM.