Audi includes all the modern performance upgrades in its arsenal to make the 2018 Audi TT RS one wicked sports coupe. The 2.5-liter turbo five makes 400 hp and drives all four wheels through a seven-speed dual-clutch automatic; we estimate a 0-60 time of 3.6 seconds. Steering-wheel-mounted ignition and drive-mode selector switches, a fixed rear wing, gaping front intakes, and large oval-shaped tailpipes separate the RS from other TTs. The coupe (not roadster) comes to the U.S. in the early summer of 2017.