Mercedes-Benz M273 | |
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Overview | |
Manufacturer | Mercedes-Benz |
Production | 2005–2013 |
Layout | |
Configuration | Naturally aspirated 90° V8 |
Displacement | 4.7 L (4,663 cc) 5.5 L (5,461 cc) |
Cylinder bore | 92.9 mm (3.66 in) 98 mm (3.86 in) |
Piston stroke | 86 mm (3.39 in) 90.5 mm (3.56 in) |
Cylinder block material | Aluminium |
Cylinder head material | Aluminium |
Valvetrain | DOHC 4 valves x cyl. and continuous VVT |
Combustion | |
Fuel system | Sequential port injection |
Fuel type | Gasoline |
Cooling system | Water cooled |
Output | |
Power output | 250–285 kW (340–387 PS; 335–382 hp) |
Torque output | 460–530 N⋅m (339–391 lb⋅ft) |
Chronology | |
Predecessor | Mercedes-Benz M113 |
Successor | Mercedes-Benz M278 |
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.
An evolution of the M113 V8, [1] all M273s have aluminium engine blocks, sequential port fuel injection, fracture-split forged steel connecting rods, a one-piece cast crankshaft, and a magnesium intake manifold. The cylinders are lined with silicon/aluminium, and a dual-length variable-length intake manifold is fitted. [2]
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.
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:
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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