Classic. It’s come a long way to inspire the RS4 of today.
As Audi grew increasingly confident with its ability to take on Mercedes-Benz and BMW, it turned its attention to applying the knowledge it gained from its rally program to performance-oriented models that were fully street legal. After launching several evolutions of the quattro coupe, the automaker took the first step towards building a full-fledged lineup of S-badged models with the 1990 S2 – a high-performance version of the Coupé – and the 1991 four-door S4.
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