BMW’s New M3 V8 Engine: Official M V8 Engine Specs

BMW released pictures of their newest M variant V8 engine this morning. This new high-revving engine is slated to power the first ever V8 M3. The all new M3 Concept Car was unveiled a couple of weeks ago at the Geneva Auto Show. The new M3 featuring this all new V8 engine should be unveiled at the Frankfurt Auto Show in September 2007 as a 2008 model.

Here are some bullet points of the car and engine specifications.

• 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.

Feature/entity		2nd engine of the M engine family 
Fuel		Otto RON 98 (95)
Max output	hp (kW)	420 (309)
at	min–1	8,300
Max torque	Nm	400
at	 min–1	3,900
Max engine speed	min–1	8,400
Stroke	mm 	75.2
Bore 	mm 	92.0
Displacement	cm3	3,999
Distance between cylinders	mm	98
Cylinder arrangement		8-cylinder V-engine 
Valve plate diameter, intake	mm	35.0
Valve plate diameter, outlet	mm	30.5
Compression ratio		12.0
Fuel injection		Intake pipe fuel injection 
Fuel injection pressure 	bar 	3–6
Average combustion chamber pressure	bar	12.6
Maximum combustion chamber pressure	bar	100
Engine weight to BMW standard	kg	202
Output per litre	hp/L	105
Power-to-weight ratio 	kg/kW	0.65
Crankcase		Aluminium 
Valvetrain		Infinite camshaft adjustment 
 		and hydraulic valve clearance adjustment  
 		for intake and outlet (double VANOS) 

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Click the images for larger pictures (Not all are linked, I ran out of time).

BMW, New Car Previews, Sports Cars


  1. Damn ! Nw datz wat u call an ENGINE ! fantastic kw/per litre, should go lyk stink ! Thatz 1 fine engine, job well done Bayerische Motoren Werke !

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