Long, low, and perfectly proportioned, Audi’s five-door A7 Sportback is arguably the most beautiful car in the marque’s stable. And with the new 2013 S7 sport edition, the two-plus-two seater gets a performance upgrade to match its styling. The S7 packs a four-liter twin-turbo V-8 engine that delivers enough horsepower and torque to propel it from zero to 60 m.p.h. in 4.5 seconds. progress.audiusa.com