A completely newly developed AMG 5.5-liter V8 biturbo engine with a peak output of up to 563 hp and maximum torque of up to 664 lb-ft. will enter the lineup in late 2010.
The new eight-cylinder unit known internally as the M 157 impresses with a wealth of technological highlights such as direct gasoline injection with spray-guided combustion and twin turbochargers.

The 2011 S63 AMG, in which the V8 biturbo will have its market debut, acheives an estimated 22.4 mpg (NEDC combined consumption, provisional figure). An intelligently designed power transfer plays a major part in this: the unique AMG SPEEDSHIFT MCT 7-speed sports transmission combines performance with economy, and includes a new start/stop function in the “Controlled Efficiency” driving mode. The new engine/transmission combination is the epitome of exclusivity, sophistication, high performance and economy.

Direct gasoline injection with spray-guided combustion and twin turbocharging

While the AMG 6.3 liter V8 naturally aspirated engine has a displacement of 6208 cc the new AMG 5.5-liter V8 biturbo unit makes do with 5461 cc. The use of direct injection technology results in a reduction of exactly 747 cubic centimeters and increases efficiency. For the first time, AMG is also utilizing the advantages of direct gasoline injection with spray-guided combustion and piezo-electric injectors: thanks to its higher thermodynamic efficiency, this technology makes more efficient use of fuel and leads to lower exhaust emissions. AMG combines this spray-guided combustion with twin turbochargers. Other highlights include a crankcase wholly of aluminum, four-valve technology with adjustable camshafts, an air/water intercooler, generator management and a start/stop function as standard.

This high-tech package leads to a high output and torque yield, together with fuel consumption figures that are unrivalled in the competitive lineup. The AMG 5.5-liter V8 biturbo engine develops a peak output of 536 hp and maximum torque of 590 lb-ft. In conjunction with the AMG Performance package these figures are increased to 563 hp and 664 lb-ft. 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.

AMG CEO Volker Mornhinweg: “Efficiency plus performance”

“With the new AMG V8 biturbo engine and the AMG SPEEDSHFT MCT 7-speed sports transmission, we are confronting the challenges of the future and focusing on fuel consumption and exhaust emissions even more intensively than before. Our new high-performance engine shows that AMG occupies a leading position
in terms of both efficiency and our brand commitment to “performance,” says Volker Mornhinweg, Chairman of Mercedes-AMG GmbH.

“The new AMG V8 biturbo engine is yet another milestone in our impressive V8 history. For the first time we have combined spray-guided direct gasoline injection with turbocharging. With this high-tech package we are “best in class” with respect to fuel consumption, output and torque,” says Friedrich Eichler, Head
of Engine and Powertrain Development at Mercedes-AMG.