Point of view test drive video with onboard footage of the new 2014 BMW M4 Convertible. The M4 Convertible has a 3.0 liter petrol 6 in-line M TwinPower Turbo engine with two mono-scroll turbochargers. The engine delivers 431 BHP and 550Nm and sprints from 0-100km/h in 4,6s. Top speed is limited at 250km/h. The test car had a seven-speed M dual-clutch transmission.