Executive Cars - Mercedes CL63 AMG
26 July 2010
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Higher performance, lower consumption - the new CL 63 AMG
New design and new high-tech drive system for the Mercedes-Benz CL 63 AMG along with a new cutting-edge look and state-of-the-art technology add these to some stylish visual modifications, a completely newly developed powertrain and the package adds up to Mercedes all new CL 63AMG.
The new CL 63 AMG marks the start of a new chapter in the "AMG Performance 2015" drive strategy: Mercedes-AMG is continuing this impressive story and is meeting its promise to continuously improve fuel consumption and reduce emissions of new models with the new engine/transmission combination - while reaching new heights with the central AMG brand value of "performance".
Direct petrol injection and twin turbocharging
Designated internally as the M157, the new V8 engine is a prime example of efficiency and features a whole host of impressive technological highlights: for the first time Mercedes-AMG is taking advantage of direct petrol injection with spray-guided combustion and piezo injectors. The technology enables improved fuel economy thanks to higher thermodynamic efficiency, which in turns leads to lower exhaust emissions. AMG has combined the spray-guided combustion with biturbocharging. Other highlights of the innovative, original eight-cylinder engine from Affalterbach include full aluminium crankcase, four-valve technology with variable intake valve timing, air/water charge air cooling, generator management and also standard start/stop function. Compared with the AMG 6.3-litre naturally aspirated V8 engine with a displacement of 6208 cc, the new AMG 5.5-litre V8 biturbo engine achieves all this with a displacement of 5461 cc.
This high-tech package leads to a high output and torque yield, together with fuel consumption figures that are unrivalled in the competitive line-up. The AMG 5.5 litre V8 biturbo engine develops a peak output of 544 hp and maximum torque of 800 Nm. In conjunction with the AMG Performance package these figures are increased to 571 hp and 900 Nm. A look at the performance diagrams shows that no other engine in this output class achieves the figures delivered by the new AMG biturbo. The major difference between the two performance classes is an increase in the maximum charge pressure from 1.0 to 1.3 bar. In addition, the engine cover of the CL 63 AMG with the AMG Performance package comes with high-quality carbon-fibre applications.
Quantum leap: fuel consumption improvement of 38 per cent
With an fuel consumption of 26.9 mpg, the new CL 63 AMG is 7.4 mpg more economical than the previous model powered by the naturally aspirated AMG 6.3-litre V8 - despite an increase in maximum power of 19 hp and 46 hp respectively, and in torque of 170 and 270 Nm. Engine specialists consider this achieved fuel saving of more than 25 percent to be nothing less than a quantum leap. CO2 emissions have also been significantly reduced: at 244 grams per kilometre, the figure is 29 percent lower than for the previous model. Both performance variants have identical fuel consumption and CO2 figures.
With figures like these, the new CL 63 AMG is not only considerably better than all its competitors, but also more fuel-efficient than much less powerful cars in this segment.
Sports car-level performance
At the same time the CL 63 AMG delivers superior performance at sports car level: the Coupé accelerates from 0-62 mph in 4.5 seconds, and has an electronically limited top speed of 155 mph. The 62 mph mark is reached in just 4.4 seconds with the AMG Performance package, with the top speed increased to an electronically limited 186 mph.
It is not only the unrivalled torque delivery of this turbocharged eight-cylinder that makes the heart beat faster, as the agile responsiveness with no irritating charger delay also leads to an effortlessness and dynamism previously unknown in this output class. All perfectly matched by the characteristic and powerful, sonorous engine note. Moreover, this AMG high-performance engine naturally meets all
the requirements with respect to smooth, quiet running and the comfort on long journeys that is to be expected of a Mercedes.
AMG SPEEDSHIFT MCT 7-speed sports transmission
Power is transferred by the AMG SPEEDSHIFT MCT 7-speed sports transmission used exclusively by AMG. It combines high emotional appeal with outstanding driving dynamics and a high level of efficiency. A wet start-up clutch replaces a conventional torque converter, and helps to save fuel. The exemplary fuel economy is also in large measure due to the standard stop/start function. This system is active in the transmission's Controlled Efficiency ("C") mode, and switches the eight-cylinder engine off when the car comes to a stop. In "C" mode the coupé always starts off in second gear, and the transmission shifts to the next, higher gears at a decidedly early stage. With its high torque at low engine speeds, the V8 engine encourages a smooth, effortless driving style.
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