Just spotted this very rare spec 90 quattro. It has the 'Sport Look' option which was introduced at the end of 1988 for the '89 Model Year, and announced in the Autumn/Winter 1988 'The Audi Magazine'. It is very similar in spec to the later 90 quattro Sport 20V with the following differences. Firstly, it is the 2226cc non cat 10V engine, it has the 15"x6" Aero alloys on 205/50/15s. Otherwise, pretty much the usual Sport goodies, black 'quattro' script Jacquard Satin trim, 3 extra dials, ski bag, 25mm lowered suspension, dechrome, raised alluminium spoiler etec, etc. Sadly, this one does not appear to be fully loaded as per F871 WNH and F650 ROR. I like it, though.
http://www.pistonheads.com/SALES/3286944.htm