The 2006 American Le Mans Series specification Audi R8 LMP1 represented the final competitive evolution of one of the most successful endurance racing cars ever built.
The Audi A4 quattro Super Touring, also known as the Audi A4 STW, is a racing version of the first-generation Audi A4 (B5) developed for the FIA Class 2 / Super Touring regulations.
Audi returned to the DTM for 1991 with a slightly updated V8 quattro Evo. Hans Joachim Stuck would lead the squad with the #1 car, though a young upstart new to the Audi brand if not the series was Frank Biela.
Having had quattro deemed an "unfair advantage" and thus outlawed in Trans-Am in 1988 and IMSA GTO racing in 1989 for its on-track dominance, Audi Sport turned to the German DTM series.
