Gentlemen, Found an interesting web page on a outfit in the Denver area that has put a 20V Turbo engine in a Ur-Quattro. They also say they have a spare S4 engine that they will drop in a car for anyone who is interested!!!! They also have some Audi's for sale - one 91 20V TQ with 100k miles. Check out: http://www.aquattro.com Russ 87 5KCSTQ (1.8 bar, When in doubt gas it!) Littleton, CO