Mercedes-Benz OM628 engine

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Mercedes-Benz OM628
Mercedes OM628 engine.png
Overview
Manufacturer Mercedes-Benz
Production1999–2005
Layout
Configuration 75° V8
Displacement 4.0 L (3,996 cc)
Cylinder bore 86 mm (3.39 in)
Piston stroke 86 mm (3.39 in)
Cylinder block material Aluminium alloy
Cylinder head materialAluminium alloy
Valvetrain DOHC 4 valves x cyl.
Compression ratio 18.5:1
Combustion
Turbocharger Garrett GT1749V
Fuel system Common rail
Fuel type Diesel
Cooling system Water cooled
Output
Power output 184–191 kW (250–260 PS; 247–256 hp)
Torque output 560 N⋅m (413 lb⋅ft)
Chronology
Successor Mercedes-Benz OM629 engine

The Mercedes-Benz OM628 engine is a turbocharged diesel V8 engine produced by Mercedes-Benz, from 1999 to 2005.

Contents

Design

The OM628 was created in response to competing V8 diesel engines produced by Audi and BMW. [1] It first appeared in the W220 S400 CDI and was subsequently the first V8 diesel engine in a Mercedes passenger vehicle. The OM628 engine features dual overhead camshafts, 4 valves per cylinder, exhaust gas recirculation, a Garrett GT1749V turbocharger, and Euro 4 emissions compliance. [2] The engine block and cylinder heads are made from an aluminium alloy, via the sand-casting process.

Models

EnginePower@ rpmTorque@ rpmYears
OM628
DE40 LA
184 kW (250 PS; 247 hp)4,000560 N⋅m (413 lb⋅ft)1,700–2,6001999–2005
191 kW (260 PS; 256 hp)2003–2005

OM628 (184 kW version)

OM628 (191 kW version)

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