Mercedes-Benz OM904 engine

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The Mercedes-Benz OM904 is a 4.2 liter (4,249cc) Inline-four engine (I4) OHV Diesel engine with 3 valves per cylinder. [1] It is related to the OM906 Straight-six engine which has two extra cylinders, while the bore and stroke remain unchanged. [2]

Contents

It launched in 1996 and had a Unit injector system to deliver fuel to every cylinder. It used a twin-scroll Turbocharger that was giving ~0.5-1.4atm of boost. [3]

Engine Details
Power:75-130kW (101-174hp) @ 2,200 rpmHeight:930mm (36.6in)
Torque:400-670Nm (295-494lb.ft) @ 1,200-1,600 rpmWeight:405kg (893lbs)
Aspiration:Twin-scroll turbocharger, intercoolerInjection:Direct injection
Compression Ratio:18:1Boost:0.5-1.4atm
Bore:102mm (4in)Launch Year:1996
Stroke:130mm (5.1in)
Displacement:4,249cc (259.3CI)
Redline:2,300
Length:944mm (37.2in)
Width:610mm (24in)

Torque Curve

OM904 Torque Curve.png

See also

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References

  1. "Diesel Engine OM 904". www.idem.ir. Retrieved 2019-09-13.
  2. "Mercedes OM904 - OM906 engine specs, bolt torques, manuals". barringtondieselclub.co.za. Retrieved 2019-09-13.
  3. "The history of medium-duty engines at Mercedes-Benz". www.fleetnews.co.uk. Retrieved 2019-09-14.