Audi S7 C7 / C8

Mechanically identical to the S6 across both generations — see the S6 page for engine and powertrain detail. The differentiator is the body: the S7's fastback roofline runs from A-pillar to a rear hatch, with a hatchback opening that gives genuine cargo flexibility despite the lower roofline. The C7's twin-turbo V8 (420 hp) and the C8's mild-hybrid V6 (444 hp) both deliver 4.4-4.5 second 0-60s. Where the S7 stands apart from the S6 is purely styling — buyers who pick the S7 over the S6 are paying for the silhouette, full stop. Production volumes are smaller, used examples rarer, but resale follows the S6 closely.