Sharing the chassis and many body panels with the legendary ur quattro, the original Audi 4000 (80 in Europe) might qualify as one of the best kept secrets in the vintage Audi collecting market. No, it doesn't have the more potent turbocharged 5-cylinder, but it does boast design by Giugiaro - one of very few post-war Audis ever sold with design by an Italian carozzeria. Even more rare is the US-spec small bumper 4000S quattro - only built in 1984 before the smoothing and updating of the eventual 4000 facelift.

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