I'm not 100% sure, but I think by 2002 the 20" wheels were standard on the only two remaining D2 models which were the S8 and the 2.8QS. Up to 2001, sport models were on 18s - the Bolero (7 rounded spokes) on the A8 sport, and the Avus (6 flat spokes) on the S8. Comfort models always had the 17" Competition (aka fat fives).
My grey S8 is an early 2002 which was still on 18" Avus with alloy hubs, but its the only 2002 I've seen that is. Everything else is on 20" by then. The 2002 and 2003 2.8QS's I've had have both been 20" cars.
This is the sort of thing we really need Ian for as he is the oracle as far as specs and configuration are concerned
