The Audi A7 combines a tapered roofline and coupelike ... and the even mightier RS 7 comes with a bellowing 621-hp, twin-turbo 4.0-liter V-8. The A7’s competitors include the BMW 5 Series ...

which Audi calls Tiptronic as opposed to S tronic for dual-clutch units. Behind the wheel of the savagely powerful ABT RS 7 Legacy Edition is none other than Daniel Abt, who managed to run 2.91 ...