C 55 AMG: 5439cc V8

Superior performance and torque as well as high technology straight from the race track — the large-displacement eight-cylinder power package in the new C 55 AMG is sure to thrill auto lovers the world over. The AMG V8 with 5,439cc displacement provides 367bhp at 5,750 rpm and develops a maximum torque of 510Nm at 4,000 rpm. No other vehicle in this competitive segment produces such impressive figures.

At about 2,000 rpm, the AMG high-performance engine can already deliver more than 400Nm of torque, creating ideal conditions for dynamic acceleration and elasticity. But there is something more at work here than the kick delivered by the high engine speeds and the responsiveness to even the slightest movement of the gas pedal.

It is the enormous torque of the high-displacement, naturally aspirated engine. Thanks to the enormous reserves of power, casual cruising in the upper gears becomes a sheer pleasure and enhances the new C 55 AMG’s special allure.

Engine design benefits from more than three decades of AMG motor racing
The eight-cylinder engine equipped with three-valve technology and a twin-ignition system is loaded with high technology straight from the race track. In designing the engine, the engineers at Mercedes-AMG GmbH were able to call on the deep knowledge gained over more than three decades of motor racing.

Cast pistons made of aluminium are used in the cylinders. Specially developed oil-gun jets keep the pistons cooled even during peak stress. “Hand-crafted” camshafts, a newly developed double-flow induction-pressure unit and a specially tuned variable induction pipe ensure that the cylinders are optimally filled at all engine speeds and create the technical basis for the engine’s sporty character.

Newly developed AMG sport exhaust system with low emission levels
The totally redesigned exhaust system equipped with wider pipes and modified mufflers reduces the exhaust back pressure and promotes higher power and torque levels. Four ceramic catalytic converters teamed up with secondary air injection and AMG’s specially tuned engine management system ensure highly effective emission control.

None of the emission limits in effect around the world pose any problem for the C 55 AMG. It even meets the EU4 exhaust standard scheduled to take effect in 2005. The AMG sport exhaust system with its two oval chrome-plated twin tailpipes serves as more than an eye-catcher at the back of the vehicle. Its unmistakable V8 sound also expresses the dynamic character of the new AMG V8 top model in the C-Class.

A quick look at the C 55 AMG’s most important data:
Cylinders/valves V8/3
Displacement (cc) 5,439
Bore x stroke (mm) 97.0 x 92.0
Compression ratio 11.0 : 1
Performance (kW/HP) at rpm 270/367 at 5,750
Max. torque (Nm) at rpm 510 at 4,000
0-100 km/h (s) 5.2 (5.4)
0-200 km/h (s) 18.6 (18.8)
Top speed (km/h) 250*
NEDC combined consumption
l/100 km 11.9 (12.3)
Emission class EU4
* electronically limited; values in parentheses: C 55 AMG estate

The state-of-the-art light-weight AMG engine weighs only 172kg in a dry state. The weight distribution is almost completely even, which helps vehicle handling.

Hand-made engines at the AMG plant
The AMG eight-cylinder engine is produced at AMG’s engine facility. In accordance with the philosophy of “one man, one engine”, an AMG technician puts together the complete engine by hand. As a result, he is responsible for everything from the installation of the crankshaft in the engine block to the assembly of the camshaft and the cables and oil fill-up.

Once the engine is finished, the technician signs the engine tag to clearly show who is responsible for the product. The engine is then tested with simulated loads and pressure build-up at the so-called cold test bed.

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