The Audi RS 4 Sport (Type 8D) was a limited, factory-sanctioned high-performance variant of the first-generation Audi RS 4 Avant, produced by Audi and developed by quattro GmbH.
The Audi A8L 6.0 quattro is the long-wheelbase, twelve-cylinder flagship variant of the first-generation Audi A8 (D2), produced in limited numbers for the 2001 and 2002 model years.
The Audi W12 engine coded AZC is the first production version of the Volkswagen–Audi Group’s twelve-cylinder W-configuration architecture, introduced for the 2001 model year in the Audi A8 (D2).