Tweaked to 340hp, the V8 powered S6 Avant was an Audi wagon that really hauled, but an Audi A-sedan that left that wagon draggin’ was the RS6. Powered by a twin turbo V8 rated at 450 hp and sold only with AWD, the RS6 also had dynamic ride control, which links shocks diagonally to damp pith and roll.
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