More power combined with 80 kg less weight and a dual-clutch gearbox equates to a 0-62 mph time of 4.1 seconds, down from 4.6. Top speed is electronically limited to 155 mph. A six-speed manual gearbox comes as standard complete with an auto throttle-blipping function, but if you want the new Smokey Burnout function (similar to that on the new Mustang), you'll have to opt for the seven-speed dual-clutch. To get the M4 at 1,500 kg and M3 at 1,523 kg, BMW
utilized carbon-fiber reinforced plastic (CFRP) in the the roof (saving 5 kg), a strut brace under the hood, and under the bodywork most notably in the prop shaft, which BMW says will allow for a more responsive powertrain.