More power and less consumption for the new CL and S AMG models

Mercedes-Benz and AMG are launching two new and improved engines that will be placed under the bonnet of the S and CL models. The AMG 5.5-litre V8 biturbo and the AMG V12 will be fitted on the S 63 AMG and CL 63 AMG and the S 65 AMG and the CL 65 AMG respectively. The two engines develop higher performance but at the same time have their fuel efficiency enhanced.

AMG 5.5-litre V8 biturbo

The AMG 5.5-litre V8 biturbo is a completely newly developed powertrain. With a peak output of up to 420 kW (571 hp) and a torque of up to 900 Nm this engine, combined with the unique AMG SPEEDSHIFT MCT 7-speed sports transmission, this engine contributes to significant cuts in consumption and emissions, although it sees its maximum power and torque increased.

Mercedes-Benz and AMG state that the S 63 AMG and CL 63 AMG have fuel consumption of 10.5 litres per 100 kilometres on the combined cycle, which not only gives them advantage against direct competitors but also puts them more than 25 percent more economical than the previous models with naturally aspirated V8 engine.

With the S 63 AMG and CL 63 AMG, Mercedes-AMG is beginning a new chapter in the "AMG Performance 2015" drive strategy, which aims to continuously reduce both the fuel consumption and emissions of new models with the new engine/transmission combination. The strategy also has the objective to keep on reaching new heights with the central AMG brand value of "performance".

According to Ola Källenius, head of Mercedes-AMG GmbH: "We are heading into a new era with the S 63 AMG and CL 63 AMG: for the first time we have combined spray-guided direct petrol injection with biturbocharging and the start/stop system. Together with the AMG SPEEDSHIFT MCT 7-speed sports transmission, we have reduced both fuel consumption and emissions significantly – while at the same time increasing output and torque."

In terms of fuel consumption engine specialists consider that the fuel saving of more than 25 percent is impressive. In fact, comparing with the preceding models powered by the naturally aspirated AMG 6.3-litre V8 the S 63 AMG and CL 63 AMG are 3.9 litres more economical, with fuel consumption fixed at 10.5 litres per kilometer. It is even more impressive when you check that these cars had their power increased by 14 kW (19 hp) and 34 kW (46 hp) as well as their torque (170 and 270 Nm).

At the same time the S 63 AMG and CL 63 AMG keep their performance heritage alive, with both V8 models accelerating from zero to 100 km/h in 4.5 seconds, achieving an electronically limited top speed of 250 km/h. Thanks to the AMG Performance package the 100 km/h mark is reached in just 4.4 seconds and the top speed increases to an electronically limited 300 km/h.

AMG V12

Also coming to the market is an enhanced version of the AMG V12 engine which features under the S 65 AMG and the CL 65 AMG bonnet. The famous AMG engine has seen its power increase from from 450 kW (612 hp) to 463 kW (630 hp), with the fuel consumption and emissions being reduced.

With a displacement of 5980 cubic centimetres, the AMG V12 generates 463 kW (630 hp) at 4800 rpm. Its maximum torque has been electronically limited to 1000 Nm in order to make allowances for the powertraind and for it to remain constant between 2300 and 4300 rpm.

In terms of performance both AMG V12 models accelerate from 0 to 100 km/h in just 4.4 seconds, and are capable of hitting a top speed of 250 km/h (electronically limited).

Although the power output has risen Mercedes-AMG was able to reduce fuel consumption and exhaust emissions. The NEDC-combined fuel consumption of both models is now 14.3 litres per 100 kilometres, which represents a cut of 0.2 litre per 100 km.