Engine Mercedes OM446

The Mercedes OM446 engine is a naturally aspirated V8 turbocharged diesel engine with an output of 381 to 530 hp. and meets the environmental standard “Euro-1”. After August 1991, production engines were equipped with an additional retarder consisting of exhaust valves located on the cylinder head.

V-shaped diesel OM446 of the 400th long-stroke – with a cylinder diameter of 128 mm, the piston stroke is 142 mm. Includes 27 modifications. The large displacement engine is designed for tough working conditions. Used on Mercedes-Benz Sk trucks.

Specifications

Production years 1987
Configuration inline
Valves 16
Number of cylinders 8
Compression ratio (compression) 16.25:1
Piston stroke, mm 142
Cylinder bore, mm 128
Crankshaft bearings 5
Displacement, cc 14618
Timing mechanism gear
Power output, hp 381 – 530
Fuel type diesel
Cooling water
Configuration V
Euro standards Euro-1
Cylinder head OHV
Turbine turbocharged with intercooler

Modifications

Modification Power output, kW [rpm] Power output, hp [rpm]
OM 446.920 390 530
OM 446.922 320 435
OM 446.923 320 [1900] 435 [1900]
OM 446.924 280 381
OM 446.925 280 381
OM 446.926 280 381
OM 446.927 280 381
OM 446.928 280 381
OM 446.929 280 381
OM 446.930 280 381
OM 446.931 280 381
OM 446.932 390 530
OM 446.933 390 530
OM 446.934 280 [2100] 381 [2100]
OM 446.935 320 435
OM 446.936 320 435
OM 446.938 280 [2100] 381 [2100]
OM 446.939 320 435
OM 446.940 320 435
OM 446.941 320 435
OM 446.942 320 435
OM 446.943 320 435
OM 446.944 320 [1900] 435 [1900]
OM 446.945 390 530
OM 446.946 390 530
OM 446.947 390 [1900] 530 [1900]
OM 446.948 320 435

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