Will use the same S55 engine as M3 and M4.
Speaking at a company press conference, BMW CEO Dr. Norbert Reithofer confirmed that a future M4 Gran Coupe model is currently in the works, and is expected to debut this coming September: "In June, following the Coupe and Convertible, the third model in the new 4 series will be launched: the Gran Coupe. And for those customers who enjoy an even sportier drive, the M version will be available in September."
The M4 Gran Coupe will employ the same S55 engine as the M3 Sedan and M4 Coupe and Convertible, producing 431 horsepower and 406 lb-ft of torque. It will be mated to a six-speed manual gearbox or a seven-speed DCT. Stay tuned for more details.