Mercedes-Benz M113 engine

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Mercedes-Benz M113/M155
Mercedes Benz SL55 AMG - Flickr - The Car Spy (9).jpg
M113 Kompressor in SL 55 AMG
Mercedes-AMG (AMG)
Configuration90° V8
Displacement4.3 L (4,266 cc)
5.0 L (4,966 cc)
5.4 L (5,439 cc)
Cylinder bore89.9 mm (3.54 in)
97 mm (3.82 in)
Piston stroke84 mm (3.31 in)
92 mm (3.62 in)
Block materialAluminium
Head materialAluminium
ValvetrainSOHC 3 valves x cyl.
SuperchargerAMG-developed with intercooler
Fuel systemSequential fuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Power output279–641 bhp (283–650 PS; 208–478 kW)
Torque output400–820 N⋅m (295–605 lb⋅ft)
PredecessorMercedes-Benz M119
SuccessorMercedes-Benz M273, Mercedes-Benz M156 (most AMG applications), Mercedes-Benz M152 (SLK55 AMG)

The Mercedes-Benz M113 (and similar M155) engine is a gasoline-fueled, spark-ignition internal-combustion V8 automobile engine family used in the 2000s. It is based on the similar M112 V6 introduced in 1998, then later phased out in 2007 for the M156 AMG engine and the M273 engine.

The standard Mercedes-Benz M113s were built in Untertürkheim, Germany, while the AMG versions were assembled at AMG's Affalterbach, Germany plant. M113s have aluminum/silicon (Alusil) engine blocks and aluminum SOHC cylinder heads with two spark plugs per cylinder. The cylinder heads have 3 valves per cylinder (two intake, one exhaust). Other features include Sequential fuel injection, iron coated piston skirts, fracture-split forged steel connecting rods, a one-piece cast camshaft, and a magnesium intake manifold.

M113 43[edit]

The M113 43 is a 4.3 L (4,266 cc) version. Bore and stroke is 89.9 mm × 84 mm (3.54 in × 3.31 in). Power output is 275 hp (279 PS; 205 kW) at 5,750 rpm with 400 N⋅m (295 lb⋅ft) of torque at 3,000 rpm. Output for the variant used in the C43 AMG is uprated to 302 bhp (306 PS; 225 kW) at 5,850 rpm and 410 N⋅m (302 lb⋅ft) at 3,250 rpm.


M113 50[edit]

The M113 50 is a 5.0 L (4,966 cc) version with a bore and stroke of 97 mm × 84 mm (3.82 in × 3.31 in). Power output is 302 bhp (306 PS; 225 kW) at 5,600 rpm with 460 N⋅m (339 lb⋅ft) of torque at 2,700 to 4,250 rpm. The G 500 and ML 500 both use a deforced version of the 5-liter M113 engine and their output is 292 bhp (296 PS; 218 kW) and 288 bhp (292 PS; 215 kW) respectively. Active Cylinder Control variable displacement technology is optional.


M113 55[edit]

The M113 55 is a 5.4 L (5,439 cc) version with the same 97 mm (3.82 in) bore as the M113 50/500 but with a longer 92 mm (3.62 in) stroke developed by Mercedes-AMG. These cars were the first to carry the 55 AMG title. Power output is 342 to 362 hp (347 to 367 PS; 255 to 270 kW) at 5,500 rpm with 510 to 530 N⋅m (376 to 391 lb⋅ft) of torque at 2,800–5,400 rpm. Many popular tuners such as Kleemann USA and AMG itself developed supercharger systems for this model, mirroring the later M113K design.[1] The engine has a power output of 400 hp (406 PS; 298 kW) at 5,750 rpm and 519 N⋅m (383 lb⋅ft) of torque at 3,750 rpm in the SLK55 AMG Black Series.[2][3]


M113K - Kompressor[edit]

The M113 Kompressor is a supercharged and twin-intercooled version of the 5.4 L (5,439 cc) M113. It is commonly referred to as "M113K" - where 'K' stands for Kompressor (supercharger). Power output varies depending on year and model, from 469 bhp (476 PS; 350 kW) at 6,100 rpm for the E 55 AMG to 574 bhp (582 PS; 428 kW) in the 2004–2006 CLK DTM AMG, with 700 to 800 N⋅m (516 to 590 lb⋅ft) of torque at 2,750–4,000 rpm.

Many Mercedes-AMG enthusiasts consider the M113K as the last of the great Kompressor engines used by Mercedes-AMG excluding the Mercedes SLR McLaren. Mercedes-AMG replaced this model with their new 6.2 L naturally aspirated V8, making the transition from 55 AMG to the 63 AMG. Although the new 6.2 L M156 AMG motor produced greater peak horsepower, many enthusiasts were disappointed by the lack of torque present in the new naturally aspirated design. The M113K engine has also received praise for its reliability.[1]



The M155 is a version of the supercharged 5.4 L (5,439 cc) M113 specifically for the Mercedes-Benz SLR McLaren. Power output is 617 bhp (626 PS; 460 kW) at 6,500 rpm with 780 N⋅m (575 lb⋅ft) of torque at 3,250 rpm.[5] An uprated version with 641 bhp (650 PS; 478 kW) at 6,500 rpm and 820 N⋅m (605 lb⋅ft) of torque at 4,000 rpm is featured in the 722 edition.[6]


See also[edit]


  1. ^ a b "A Look Back at the Legendary M113 K V8, One of the Best Engines Developed by AMG". June 9, 2021.
  2. ^ "Mercedes SLK55 AMG Black Series (2006) review". Car Magazine. July 31, 2006.
  3. ^ "Mercedes Benz gives Black Series treatment to SLK55 AMG". Motor Trend. August 28, 2007.
  4. ^ "Base G55 AMG 4dr 4x4- 2011 Mercedes-Benz G-Class Equipment". Autoblog. Retrieved 21 August 2016.
  5. ^ "Tested: 2005 Mercedes-Benz SLR McLaren". Car and Driver. Retrieved August 24, 2022.
  6. ^ "Mercedes-Benz SLR 722". EVO. April 15, 2007.