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AMG 5.5-liter V8 biturbo engine

Powerful and efficient: an eight-cylinder developing up to 563 hp.
Filed under:  Brand Related
 
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Aim: Best in class - top performance in all respects by virtue of a comprehensively efficient powertrain.
AMG is writing another chapter in its "AMG Performance 2015" drive system strategy: 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.


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Mercedes AMG logo. (Aufrecht Melcher Grossaspach).

This innovative, independently developed eight-cylinder power unit from Affalterbach sets new standards in terms of fuel consumption and exemplary efficiency: 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.

The S63 AMG showcar is a homage to the impressive history of powerful AMG V8 engines: visually this high-performance sedan resembles the spectacular 300 SEL 6.8 AMG, the racing car that won a class victory and second place in the overall ranking for AMG at the 24-hour race in Spa-Francorchamps (Belgium) in 1971 - and made the company world-famous overnight.

AMG Performance 2015" as the continuation of a success story.
"AMG Performance 2015" strategy, and meeting its promise to continuously reduce both the fuel consumption and emissions of new models with the new engine/transmission combination - while reaching new heights with the central brand value of "performance".

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AMG 5.5-liter V8 biturbo engine.

The new AMG 5.5-liter V8 biturbo engine will play a major part in the Mercedes-AMG model strategy over the next few years. The unique AMG SPEEDSHIFT MCT 7-speed sports transmission will also guarantee a thrilling yet economical power transfer in future AMG high-performance cars. The new engine/transmission combination is another milestone in the success story of Mercedes-AMG, which began in 1967. Another highlight in the company's more than 40-year history it undoubtedly the SLS AMG: this gull-wing model due to be launched in May 2010 is the first automobile to be completely independently developed by Mercedes-AMG. It means that as the performance brand within Mercedes-Benz Cars, AMG is not only fielding a masterpiece but also demonstrating development expertise at the highest level.

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.

Quantum leap: fuel consumption reduced by 25 percent.
With a provisional NEDC fuel consumption of 10.5 liters per 100 kilometers, the new S63 AMG is 3.9 liters more economical than the preceding model powered by the naturally aspirated AMG 6.3-liter V8 - despite an increase in output by 18 hp and in torque by 125 lb-ft. Engine specialists consider this achieved fuel saving of more than 25 percent to be nothing less than a quantum leap. CO2 emissions have likewise been significantly reduced: at 246 grams per kilometer, the figure is 28.5 percent lower than for the previous model.

With figures like these, the new S63 AMG is not only considerably better than all its competitors, but also more fuel-efficient than much less powerful cars in this segment. Taking into account its enormous performance and torque figures the new AMG 5.5 liter V8 biturbo engine is in parts twice as efficient as many mid-segment or compact-class diesel engines.

At the same time the S63 AMG delivers superior performance at sports car level: the high-performance sedan accelerates from zero to 60 mph in 4.4 seconds, and has an electronically limited top speed of 155 mph. The 60 mph mark is reached in just 4.3 seconds with the AMG Performance package, with the top speed increased to an electronically limited 186 mph.

Engine production - tradition of hand-built excellence.
Like all other AMG engines, the new eight-cylinder biturbo is assembled by hand in the AMG engine shop taken into commission in 2002. A single, highly-qualified technician assembles the M 157 according to the "one man, one engine" philosophy, maintaining the very strictest quality standards. This painstaking care is
attested to by his signature on the characteristic AMG engine plate.

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.

Exciting power delivery, characteristic sound.
These on-paper figures raise high expectations which the 536 hp AMG5.5-liter V8 biturbo certainly meets. The flat torque curve ensures enormous pulling power in all speed ranges: 494 lb-ft. are already available at 1500 rpm, and the maximum torque of 590 lb-ft. is delivered just 500rpm later, remaining constant to 4500 rpm. Even more effortless performance is ensured by the engine variant with the AMG Performance package, which has a peak output of 563 hp. In this case the eight-cylinder delivers 645 lb-ft. of torque at just 2000 rpm, with a constant 664 lb-ft available between 2500 and 3750 rpm.

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 leads to an effortlessness and performance previously unknown in this output class. All perfectly matched by the characteristic, 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.

MCT 7-speed sports transmission with Controlled Efficiency mode and start/stop function.
Power is transferred by the AMG SPEEDSHIFT MCT 7-speed sports transmission used exclusively by AMG, which is already familiar from the SL63 AMG and E63AMG and combines high emotional appeal with outstanding driving dyna-mics and a high level of efficiency. The 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 start/stop 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 sports sedan always starts off in second gear, and the transmission shifts to the next, higher gears at a noticeably early stage. With its high torque at low engine speeds, the V8 engine encourages a smooth, effortless driving style.

The eight-cylinder biturbo engine also features the generator management system familiar from the E63 AMG: whenever the engine is on the overrun or when braking, kinetic energy is used to charge the battery rather than being wasted as heat in the usual way. In all other operating modes a combination of onboard network and generator management enables the generator to be kept at a low voltage. This reduces the load on the engine and makes for fuel savings of around 0.15 liters per 100 kilometers according to the NEDC standard, and up to 0.2 l/100 km in city traffic with its frequent overrun and braking phases.

Long tradition of powerful AMG V8 engines.
Powerful eight-cylinder engines are an integral part of AMG's history. 2005 saw the debut of the AMG 6.3-liter V8 engine known as the M 156. Depending on the model, this naturally aspirated, high-revving unit develops up to 518 hp and 465 lb-ft. Reserved exclusively for the new SLS AMG, the M 159 with the same displacement of 6.3 liters has a peak torque of 563 hp and maximum torque of 479 lb-ft. Another milestone in the history of AMG engines was the supercharged AMG 5.5-liter V8 engine introduced in 2001: the M 113 K developed up to 500 hp and 516 lb-ft of torque. Even more power was forthcoming from the supercharged AMG 5.5-liter V8 engine of the SLR McLaren dating from 2003 - the M 155 generated up to 617 hp and 575 lb-ft.

The supercharged AMG 5.5-liter V8, the AMG 6.3-liter V8 and the AMG 6.0-liter V12 biturbo were all able to win the Best Performance Engine category in the International Engine of the Year Awards.

The first AMG four-valve V8 accelerates "The Hammer" to 188 mph.
Another important engine in the AMG story was the M 117, its first eight-cylinder unit with four-valve technology. With a displacement of 5.6 liters, 355 hp and 376 lb-ft of torque, this V8 accelerated the 300 CE 5.6 AMG to a top speed of 188 mph in 1987. This made the coupé the fastest German car in series production, and American fans reverently christened it "The Hammer".

The S63 AMG showcar harks back to the historic success in 1971.
A historic success was achieved by the 300 SEL 6.8 AMG in 1971: powered by an AMG V8 engine with a displacement of 6.8 liters and developing 422 hp, this signal red racing sedan crossed the finishing line in second place during its very first outing at the 24-hour race in Spa-Francorchamps (Belgium), securing victory in its class.

The spectacular S63 showcar is homage to this triumph, which made AMG world-famous overnight although the company had only been founded in 1967: decorated with sponsoring stickers identical to those on its historic predecessor, this powerful S-Class made by Mercedes-AMG is a sensation. The imposing tires in size 275/35 R 20 and 325/30 R 20 at the front and rear are just as eye-catching as the 4.5-centimetre wider front fenders on each side. The discerning car-lover will even discover exotic wood trim in the style of the original car in the interior.

The showcar is powered by the new AMG 5.5-liter V8 biturbo engine and the AMG SPEEDSHIFT MCT 7-speed sports transmission.

(source: Mercedes-Benz)


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AMG 5.5-liter V8 biturbo engine.

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Mercedes-Benz horizontal logo (in B&W).

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