The BMW M44 is a DOHC four-cylinder petrol engine which replaced the BMW M42 and was produced from 1996 to 2000 at the Steyr factory. It was produced alongside the BMW M43 SOHC four-cylinder engine, with the M44 being the higher performance engine. In 2000, the M44 was replaced by the BMW N42 engine.
|BMW M44 engine|
|Displacement||1.9 L (1,895 cc)|
|Cylinder bore||85 mm (3.35 in)|
|Piston stroke||83.5 mm (3.29 in)|
|Block material||Cast iron|
Compared with the M42, the M44 has roller rocker arms, a hot-wire MAF, displacement increased from 1.8 to 1.9 L (110 to 116 cu in) and other detail changes such as a grey cast iron crankshaft replacing the forged steel item from the previous M42. As per the final versions of the M42, the M44 has a dual length intake manifold ("DISA"). Peak power is the same as the M42, however mid-range power is increased significantly and peak torque is increased by 5 N⋅m (4 lb⋅ft) at 200 rpm lower. There was also a 70% reduction in valve train friction which contributed to the engine being more quiet and fuel efficient than its predecessor.
The M44 has a cast iron block and aluminium cylinder head, as per its predecessor.
|M44B19||1,895 cc (115.6 cu in)||103 kW (138 bhp)
at 6,000 rpm
|180 N⋅m (133 lb⋅ft)
at 4,300 rpm
The M44B19 has a displacement of 1,895 cc (115.6 cu in), which is achieved through a bore of 85.0 mm (3.35 in) and a stroke of 83.5 mm (3.29 in). A compression ratio of 10.0:1 is used, along with the Bosch Motronic 5.2 engine management system.
With time this engine was replaced by BMW N42 engine.
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