Much as BMW has its M division and Mercedes-Benz can turn to AMG when they want to make fast cars, Audi relies on its own in-house tuner, Quattro GmbH.
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Think of all the sedans sold today that are quicker than a Chevrolet Corvette Z06.
Murmurs of the Audi RS5 used to be the most we could expect on these shores, until Audi announced some months ago it would bring the sports coupe to the U.S., too.
Most car buffs are familiar with the gargling from a Ford Mustang's V-8.