BMW M57
Engine
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The BMW M57 is a straight-6 diesel engine produced from 1998 up to 2013 in BMW's upper Austrian engine plant in Steyr. Wikipedia
Compression ratio: 16.5-18.0:1
Cylinder block material: Cast iron; Aluminum (TÜ2 onwards)
Cylinder bore: 80 mm (3.15 in); 84 mm (3.31 in)
Displacement: 2,497 cc (152.4 cu in); 2,926 cc (178.6 cu in); 2,993 cc (182.6 cu in)
Fuel system: Common rail direct injection
Max. engine speed: 4750
Piston stroke: 75.1 mm (2.96 in); 82.8 mm (3.26 in); 88 mm (3.46 in); 90 mm (3.54 in)