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.
