Audi USA on Twitter: "1991 Audi Avus quattro: 6.0 liters. 60 valves. 12 cylinders. Top speed: 211 MPH. The 90's flew by. #AudiProtohype http://t.co/DIdIb36rzl" / Twitter
1991 Audi Avus Quattro Concept | Supercars.net
1991 Audi Avus Quattro Concept | Supercars.net
Audi Avus Quattro – The concept car no one knows about
TG's guide to concepts: the stunning Audi Avus quattro W12 | Top Gear