New versions of the Audi RS 6 Avant and RS 7 Sportback are set to bring the German brand even closer to supercar performance while recording best-in-class economy.
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Audi's new 4-door 552bhp RS 7 Sportback has finally been officially revealed to the public at this year's prestigious Detroit Motor Show. Coming from the same stable as the RS 6, the RS 7 will square up to the ...