It has been confirmed that BMW will be using a smaller turbo engine for the 2013 M3. It has been confirmed the upcoming ditching of the current V8 format. The naturally-drew out 4.0-litre V8 produces 309kW (420hp) and 400Nm of torque. Previous generation M3s used four and six-cylinder motors.
A report confirms that a new six-cylinder will be fitted but it will not be the same 3.0-litre twin turbo that is used in the 135i and 335i models. BMW is fiddling with the idea of a V6 for the M3. The new engine may not be more powerful than the V8 but the car would be light to counter this power handicap.
Finally assumption is that the M5 will get its cylinders cut to meet severe emissions laws and fuel economy standards. The M5 and M6 will have a double turbo V8 motor dismissing less than 5.0-litres.