New V8 Engine- Made by AMG
Mercedes-AMG has developed a new 5.5-liter V8 engine which combines powerful eight-cylinder performance with the economical fuel consumption of a four-cylinder. This unrivalled efficiency is achieved thanks to the AMG Cylinder Management cylinder shut-off system developed exclusively by Mercedes-AMG. Just like powerful, 750 hp eight-cylinder Formula 1 racing engines, cylinder shut-off is used primarily to save fuel.
Thanks to fuel savings of around 30 percent compared to the existing AMG 5.5-liter V8 engine, the high-revving naturally aspirated eight-cylinder demonstrates the great innovative strength of AMG while simultaneously demonstratiing the potential still available in naturally aspirated eight-cylinder engines.
The distinctive AMG 5.5-liter V8 engine with AMG Cylinder Management and direct fuel injection will find exclusive use in the all-new 2012 SLK55 AMG, which will celebrate its world premiere at the International Motor Show (IAA) in Frankfurt/Main in September. This means that the SLK55 AMG will remain the only roadster in its segment with an eight-cylinder engine.
Even with peak output increased by 60 hp to 415 hp and torque increased from 376 lb-ft to 398 lb-ft, the fuel consumption is about 30 percent less which places the new SLK55 AMG among the top performers in its segment.
New naturally aspirated eight-cylinder closely related to the V8 biturbo
In line with its “AMG Performance 2015″ strategy, Mercedes-AMG is meeting its promise to continuously reduce both the fuel consumption and emissions of new models over the next few years with the new V8 motor – while reaching new heights with the central brand value of “Driving Performance.”
The new M152 is based on the AMG M157 5.5-liter V8 biturbo engine which first debuted on the 2011MY CL63 AMG and S63 AMG. Numerous components and systems are basically identical, e.g. the displacement, bore/stroke, distance between cylinders, ECO stop/start system and direct injection technology. Distinguishing features versus the M157 include the new intake air ducting, new cylinder heads, the modified valve drive, an adapted oil supply system and an optimized crankcase.
High performance fuel economy and output
“With the new 415 hp AMG 5.5-liter V8 engine we have once again created a real masterpiece. The M152 sets an outstanding example for efficiency, while demonstrating the creativity and expertise of our engineers, who took their inspiration from Formula 1 when developing the cylinder shut-off system. This makes the new, naturally aspirated eight-cylinder the perfect power unit for the new SLK55 AMG, which will celebrate its premiere at the International Motor Show in Frankfurt/Main in the autumn,” says Ola Källenius, Chairman of Mercedes-AMG GmbH.