First Look: Audi S6, S7 and S8

First Look: Audi S6, S7 and S8

Audi is turning up the heat, taking aim at BMW’s vaunted M performance brand with the upcoming launch of three new S-Series models at this month’s Frankfurt Motor Show. The S6, S7 and S8 offerings will not only introduce a new high-output twin-turbo V-8 but feature...