BMW disclosed yesterday during Technology Days preliminary technical details about the 2014 M3 Sedan and M4 Coupe.

BMW disclosed yesterday during Technology Days preliminary technical details about the 2014 M3 Sedan and M4 Coupe.

Power will come from a brand new high-revving inline-six 3.0-liter TwinPower Turbo engine outputting around 430 HP (316 kW) at 7,500 rpm and a maximum torque of more than 500 Nm (369 lb-ft). Aside from being more powerful, the new engine will enable the M3 Sedan to have a 25 percent lower fuel consumption and CO2 emissions. BMW mentions they were able to lower the M3 Sedan's weight to less than 1,500 kg (3,306 lbs).

The newly developed S55 engine has a closed-deck crankcase design and comes with two mono-scroll turbochargers. BMW's engineers implemented a forged crankshaft which is not only lighter but also more rigid and thanks to the diminished rotating masses it enables the engine to provide better acceleration and response.

BMW M division chief, Freidrich Nitschke, hinted at an even lighter version tipping the scales at around 1,400 kg (3,086 lbs) thanks to a more simplistic interior cabin, lightweight seats and other weight-saving techniques. If approved for production, this lighter M3 version could bring back the CSL moniker.

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