Audi’s fab five-cylinder engine is 50 years old and, as a tribute, a group of 14 apprentices have built a crazy concept inspired by the four rings’ success in American auto racing. The GT50 concept, ...

This year’s class for the IMSA Hall of Fame includes six drivers who achieved legendary status and four of the most memorable ...

The 1989 Audi 90 Quattro IMSA GTO, equipped with a 2.2-litre turbocharged five-cylinder engine, unleashes one of the most iconic sounds in racing history. With explosive turbo lag, aggressive revs, ...