???? Engineering Mastery Under the hood lies the formidable S55 3.0-liter twin-turbocharged inline-six engine, borrowed from its larger M3 and M4 siblings. This powerplant delivers a robust 405 horsepower and 406 lb-ft of torque, propelling the M2 Competition from 0 to 60 mph in just 4.2 seconds with the 6-speed manual transmission . The optional 7-speed dual-clutch automatic transmi...