I was in the process of buying a 91 Audi 100 about a year ago. 154 some k. The alternator went and was a mint. I didnt buy the car because it had really low compression. If you took the oil cap off while the engine was running it shut down. Later I talked to an Audi guy and he said that if you do that to 10 100's of the similiar year and milage 6 of them will do the same thing. I didnt like the sound of that, but he said it wasnt a problem and was common. I ended up not buying the car because of that. Was selling for 2250 but dropped it down to 1995. I dunno if this helps at all but those were the problems I ran into.
Brian
