Mercedes-Benz M273 engine

The Mercedes-Benz M273 engine is a V8 automobile piston engine family used in the 2000s (decade). It was based on the similar M272 V6 introduced in 2004.

Mercedes-Benz M273
Overview
ManufacturerMercedes-Benz
Production2006–2013
Layout
ConfigurationNaturally aspirated 90° V8
Displacement4.7 L (4,663 cc)
5.5 L (5,461 cc)
Cylinder bore92.9 mm (3.66 in)
98 mm (3.86 in)
Piston stroke86 mm (3.39 in)
90.5 mm (3.56 in)
Block materialAluminium
Head materialAluminium
ValvetrainDOHC 4 valves x cyl. and continuous VVT
Combustion
Fuel systemSequential fuel injection
Fuel typeGasoline
Cooling systemWater cooled
Output
Power output250–285 kW (340–387 PS; 335–382 hp)
Torque output460–530 N⋅m (339–391 lb⋅ft)
Chronology
PredecessorMercedes-Benz M113
SuccessorMercedes-Benz M278

An evolution of the M113 V8,[1] all M273s have aluminium engine blocks, sequential fuel injection, forged steel connecting rods, a one-piece cast camshaft, and a magnesium intake manifold. The cylinders are lined with silicon/aluminium, and a dual-length Variable Length Intake Manifold is fitted.

In addition to this, new features shared with the M272 include DOHC aluminium cylinder heads, 4 valves per cylinder and independent continuously variable valve timing on both the intake and exhaust sides. A new electronically controlled cooling system has eliminated the need for a mechanical thermostat for improved engine warm-up and optimum control of engine temperature.

E47

The E47 is a 4.7 L (4,663 cc) version. Bore and stroke is 92.9 mm × 86 mm (3.66 in × 3.39 in). Output is 250 kW (340 PS; 335 hp) at 6000 rpm with 460 N⋅m (339 lb⋅ft) of torque at 2700-5000 rpm.

Applications:

E55

The E55 is a 5.5 L (5,461 cc) version. Bore and stroke increased to 98 mm × 90.5 mm (3.86 in × 3.56 in). Output is 285 kW (387 PS; 382 hp) at 6000 rpm with 530 N⋅m (391 lb⋅ft) of torque at 2800-4800 rpm.

Applications:

*Note: 500 or 550 model naming varies depending on geographical market.

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See also

References
  1. "Mercedes-Benz M273 engine". australiancar.reviews. Retrieved 2018-06-17.
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