The M156 is the first V8 automobile

Automobile

An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...

 engine designed autonomously by Mercedes-Benz

Mercedes-Benz

Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...

 subsidiary Mercedes-AMG

Mercedes-AMG

Mercedes-AMG GmbH, commonly known as AMG, is a subsidiary of the Mercedes-Benz car company specializing in high-performance luxury cars....

, as previous AMG engines have always been based on original Mercedes engines. The engine was designed to be a naturally aspirated racing unit, and will also be used in a number of high-performance "AMG"-badged Mercedes-Benz models.

The M156 displaces 6208 cc and shares very little with other Mercedes-Benz engine families like the M155. The bore spacing, block design, and other features are unique to the AMG engine.

Although it displaces 6.208 liters, the engine will be marketed as the "6.3" to commemorate the famed M100 engine, Mercedes' first production V8. It displaced 6.3L.

The engine uses a 102.2 mm (4 in) bore and 94.6 mm (3.7 in) stroke. Output is 375 kW at 6800 rpm with 630 newton metre of torque at 5200 rpm.

The engine, however, has been uprated to produce 525 hp (and 465 lbft of torque) in the late 2007 S 63, E 63, SL 63, CLS 63 & CL 63 modelshttp://www2.mercedes-benz.co.uk/content/unitedkingdom/mpc/mpc_unitedkingdom_website/en/home_mpc/passenger_cars/home/products/AMG_showroom/S_63_AMG/technical_data.html.

Mercedes has claimed it is the world's most powerful naturally aspirated V8 engine.

Applications:

• 2006 E 63 AMG
  Mercedes-Benz E-Class
  The Mercedes-Benz E-Class is a range of executive-size cars manufactured by Mercedes-Benz in various engine and body configurations. The E initially stood for Einspritzmotor, ; a new feature in volume production vehicles at the time that the E-Class first appeared, with the E as a suffix to the...
  
  
• 2006 ML 63 AMG
  Mercedes-Benz M-Class
  The Mercedes-Benz M-Class is a luxury mid-size sport utility vehicle , first offered in 1997 as a 1998 model, and built by the German automaker Mercedes-Benz. Gradually, the M-Class became a sales success in the United States and Mexico. In terms of size, it is slotted in between the smaller...
  
  
• 2006 R 63 AMG
  Mercedes-Benz R-Class
  The R-Class is a multi-purpose vehicle offered by Daimler AG in 2006 model year under the Mercedes-Benz brand. It is the first full-sized multi-purpose vehicle ever produced by Mercedes-Benz...
  
  
• 2006 S 63 AMG
  Mercedes-Benz S-Class
  The Mercedes-Benz S-Class is a series of luxury sedans produced by Mercedes-Benz, a division of Daimler AG. The classification was officially introduced in 1972 with the W116 S-Class, which succeeded previous Mercedes-Benz models dating to the mid-1950s...
  
  
• 2006 CL 63 AMG
  Mercedes-Benz CL-Class
  The Mercedes-Benz CL-Class is a luxury coupé automobile produced by the German automaker Mercedes-Benz. The name CL stands for the German Comfort Leicht ....
  
  
• 2007 CLK 63 AMG
  Mercedes-Benz CLK-Class
  The Mercedes-Benz CLK-Class is a mid-size rear-wheel drive coupé/convertible . While it was based on the W202 and W203 platforms of the C-Class, its styling cues, engine, and price range are closer to that of the E-Class, with Mercedes-Benz slotting the CLK as a coupé version of the W210 and W211...
  
  
• 2007 CLS 63 AMG
  Mercedes-Benz CLS-Class
  The Mercedes-Benz CLS is an executive-size sedan originally launched in 2004 and based on the W211 E-Class platform and was internally designated as the C219...
  
  
• 2008 C 63 AMG
  Mercedes-Benz C-Class
  The Mercedes-Benz C-Class is a compact executive car produced by the Mercedes-Benz division of Daimler AG. First introduced in 1993 as a replacement for the 190 range , the C-Class was the smallest model in the marque's lineup until the 1997 arrival of the A-Class...
  
  
• 2008 SL 63 AMG
  Mercedes-Benz SL-Class
  The Mercedes-Benz SL is a grand tourer manufactured by Mercedes since 1954. The designation SL derives from the German Sport Leicht, or Sport Lightweight — and was first applied to the 300SL 'Gullwing' named also after its gullwing or upward-opening doors.The term SL-Class refers to the...
  
  

M159

It is a version used in Mercedes-Benz SLS AMG. Compared to the standard AMG engine, the SLS's engine includes an all-new intake system, reworked valve train and camshafts, the use of flow-optimised tubular steel headers and dethrottling of the exhaust system. The engine also utilizes a dry-sump lubrication system to lower the center of gravity of the car.

Engine code	Years	Displacement (Bore x Stroke)	Compression	Power @rpm	Torque @rpm	Redline (rpm)
M159	2010-	6208 cc (102.2 millimetres (4 in) x 94.6 millimetres (3.7 in)	11.3 : 1	571 PS @6800	650 newton metres (479.4 ft·lbf) @4750	7200