The M3 will also feature brake regeneration technology, which charges the car’s battery without tapping on engine power.
First sales will be for the coupe model, which are expected to start in September this year, followed by the convertible, sedan and touring variants soon after.
Click ahead for a run-down of all the specs.
•First eight-cylinder for the BMW M3 sports car.
•Supreme performance ensured by 309 kW/420 hp from 4.0 litres.
•Maximum torque of 400 Newton-metres (295 lb-ft) at 3,900 rpm, 85 per cent of maximum torque over a speed range of 6,500 rpm.
•Unique thrust and muscle ensured by consistent implementation of the M high-speed engine concept, maximum engine speed 8,300 rpm.
•Consistent lightweight construction of engine and ancillary units, new V8 power unit one of the lightest eight-cylinders in the world, lighter than the straight-six power unit in the former model.
•Variable camshaft control, low-pressure double-VANOS for an optimum charge cycle, system offering full power and performance even with normal engine oil pressure.
•Eight individual throttle butterflies for spontaneous engine response.
•Consistent and reliable oil supply with longitudinal and lateral acceleration up to 1.4 g ensured by two oil pumps and wet sump oil lubrication optimised for supreme dynamic behaviour.
•Exhaust system optimising cylinder charge, optimised for weight and function by means of internal high-pressure remoulding, exhaust emissions fulfil EU4 and LEV 2 standards.
•Upgraded MSS60 engine control unit for optimum coordination of all engine functions with the various control systems in the car.
•Ion flow technology recognising and distinguishing engine knocking phenomena as well as misfiring and miscombustion by measurement of ion flow in the combustion chambers.
•Brake Energy Regeneration with intelligent alternator control.