BMW P60B40

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BMW P60B40 Engine
Overview
Manufacturer	BMW M GmbH
Production	2001–2005
Layout
Configuration	Naturally aspirated 90° V8
Displacement	4.0 L; 243.9 cu in (3,997 cc)
Cylinder bore	94 mm (3.70 in)
Piston stroke	72 mm (2.83 in)
Block material	Aluminium
Head material	Aluminium
Valvetrain	DOHC 4 valves x cyl.
Compression ratio	12.0:1
Combustion
Fuel system	Multi-port fuel injection
Management	BMW Motorsport
Fuel type	Gasoline
Oil system	Dry sump
Cooling system	Water-cooled
Output
Power output	444 bhp (331 kW; 450 PS)
Specific power	111.1 bhp (82.8 kW; 112.6 PS)
Torque output	480 N⋅m (354 lb⋅ft)

The P60B40 is a naturally aspirated DOHC V8 engine.

Usage[]

M3 GTR[]

The P60B40 was the powertrain for the BMW E46 M3 GTR from 2001 to 2005. The BMW M3 GTR competed in the GT2 Class of the American Le Mans Series in 2001. There was opposition to the car being allowed to race, rivals stated that the car was a prototype as a road going version was not available to buy. As a result of the complaints, the regulations were modified for the 2001 Le Mans 24-hour race (and the American Le Mans Series), stating that a car had to be for sale on two continents within twelve months of the rules being issued. BMW complied (leading to the M3 GTR Road Version), however, the ALMS rules were modified again in 2002 to state that there must a be a minimum of 100 cars and 1,000 engines built in order for a car to compete without penalties. BMW made the decision to pull the car rather than meet the requirements or race with the penalties, ending production of the E46 M3 GTR and the P60B40 along with it.

M3 GTR Road Version[]

In order for the M3 GTR race car to compete in the American Le Mans Series, BMW produced 10 examples of the "M3 GTR Straßen Version" road car in 2001.^[1] As per the race M3 GTR, the roadgoing Version was powered by the BMW P60B40 4.0 L V8 engine. The P60B40 was detuned for the road version from ~444Hp to somewhere between 350 and 380Hp.

Specifications[]

4-Stroke, Located Front, Longitudinally-mounted

P60B40 on display at the BMW Museum

Power: 444 bhp (331 kW; 450 PS) @ 7,500 rpm

Torque: 480 N⋅m (354 lb⋅ft) @ 5,500 rpm

5 Main bearings, Flat-plane crank shaft

Firing order: 1-8-3-6-4-5-2-7

References[]

External links[]

• Image - Engine Display - P60B40 on display at the BMW Museum