Audi sells S cars with combustion engines but no visible exhaust tips. Audi wasn't kidding ... The S6 Sedan, S6 Avant, and S7 Sportback have dropped the fakery but without putting the four tips ...
The Audi S7 is in that company and the word that came to mind while I drove all over the New York and New Jersey suburbs, with a road trip thrown in, was "magnificent." But qualified magnificent.
As for the '7' bit, the A7/S7 looks like an A5 Sportback that's parked a bit closer. But you knew that already. It's an S-model Audi ... via various flaps in the exhaust system and engine shroud.