If it is a good quality one, you will see an increase of power and mpg's, ans should be compatible with the turbo. Normally practically nothing - an '84 with over 100k miles is a couple of hundred bucks at best, if that. The Olympic thing is the only kicker, as you've noticed. Since you know exactly which number it was, it probably would be of value mainly if you can identify which athlete was in it and then preferably a famous one.
I think Audi wished they never designed that car in the first place, because that model was probably the cause of Audi ranking very poor in quality for car manufacturers during the time when the 5000's were manufactured.
I think Audi wished they never designed that car in the first place, because that model was probably the cause of Audi ranking very poor in quality for car manufacturers during the time when the 5000's were manufactured.