Autocar reports that the car is available with a 3.2-liter, 388 hp V8, good for 0-62 mph in 5.0 sec, while SPEEDTV.com reports a 4-liter, 388 hp V8. Meanwhile, the official specs for the M-series Coupe list only the 3.2-liter inline 6 from the M3, with 343 hp and 0-62 mph in 5.0 sec! And, while Autocar cites both inline 6 and V8 variants of the M Coupe, SPEEDTV.com says the M will be available only with the V8.