The all-new BMW X3 M Competition and the all-new BMW X4 M Competition   New six-cylinder in-line engine with superlative performance. The most powerful straight-six petrol engine ever to see action in a BMW M car provides the muscle for stunning performance attributes. The newly developed high-revving unit with M TwinPower Turbo technology generates maximum output of 353 kW/480 hp from its 3.0-litre displacement, together with peak torque von 600 Nm (442