DOHC, 4 valves per cylinder, variable intake + exhaust-valve timing
Compression ration (x:1)
Horsepower (hp @ rpm)
321 @ 6,800
Torque (lb-ft @ rpm)
275 @ 4,800
Six-speed automatic with console shifter and steering-wheel-mounted paddles
Transmission and axle ratios (x:1)
Best run came via power braking to 1,500 rpm, with a bit of rear wheelspin and the tranny left in Drive. Reasonably quick upshifts. Manual shifting was a tenth or so slower -- not bad, actually. Engine revs pretty quick and sounds mean at higher rpm. Manual shifting is via console lever (pull back for downshifts) or steering-wheel-mounted paddles. Holds gears to 7,000-rpm limiter. Blips throttle on manual downshifts.
Very firm pedal, although travel was on the longish side. Stopped with zero commotion whatsoever, little dive and no side-to-side wiggle. First stop was longest at 110 feet. Shortest stop was the sixth (and final) stop at 108 feet.
Decent grip from the tires, but hard to say whether the skid pad at Road Atlanta was less or more grippy than our usual test site. The ATS is pretty amenable to changes in throttle to keep understeer at bay. Chassis is responsive and balanced enough that it's easy to switch from under- to oversteer, especially with a bit of juice from the throttle.