Mercedes-Benz M176/M177/M178 engine

The M176/M177/M178 is a gasoline V8 engine line-up designed by Mercedes-AMG. They are replacing the outgoing Mercedes-Benz M278 engine and Mercedes-Benz M157 engine line-up.

Mercedes-Benz M176/M177/M178
Overview
ManufacturerMercedes-AMG
Production2015—present
Layout
Configuration90° V8
Displacement4.0 L; 243.0 cu in (3,982 cc)
Cylinder bore83 mm (3.27 in)
Piston stroke92 mm (3.62 in)
Block materialCast-aluminium, closed deck
ValvetrainDOHC 4 valves x cyl.
Compression ratio10.5:1
RPM range
Redline7,000 rpm
Combustion
SuperchargerBorgWarner's e-Booster (EQ Boost; 2019—present)
TurbochargerBorgWarner Twin-turbos
Fuel systemDirect injection
Fuel typeGasoline
Oil system
Cooling systemWater-cooled
Output
Power output340–478 kW (462–650 PS; 456–641 hp)
Torque output600–820 N⋅m (443–605 lb⋅ft)
Dimensions
Dry weight209 kg (461 lb)
Chronology
PredecessorMercedes-Benz M278 / M157 engine (4.7 & 5.5L)
Mercedes-Benz M152 engine
Mercedes-Benz M156 engine

The V8 engine is the further development of the Mercedes-AMG M133 engine, two blocks sharing a single crankshaft.[1] However, the V8s are twin-turbocharged, with the BorgWarner turbochargers positioned between the two cylinder heads in a "hot-V" configuration. The injectors are Bosch's new piezo-electric direct fuel injectors, and they deliver five squirts of fuel per combustion cycle.[2]

Within the family, the M178 and M177 variations are used in Mercedes-AMG vehicles and assembled in the AMG base at Affalterbach, while the M176 is used in mainstream Mercedes-Benz models and assembled in Mercedes's Untertürkheim plant outside Stuttgart,[3] starting with the 2015 G500 and G500 4X42.[4]

M176

The M176 is the version used in mainstream Mercedes-Benz models, debuting in 2015 for the Mercedes G500 and G500 4x42.[4] In 2019, M176 is being fitted with a 48V electrical system which has been used already in the Mercedes-Benz M256 engine. The 48V system produces additional 16 kW (22 PS) and 250 N⋅m (184 lb⋅ft) of torque.[5] Only 580 models receive 48V M176 currently.

Applications

M177

The M177 was the first variation[6] released in the Mercedes-AMG C63. In contrast to the M178, this version of the engine uses wet-sump lubrication. In the C63 and GLC63 applications, the turbos are single-scrolled, whereas in E63 and S63 are twin-scrolled and different exhaust manifold. The twin-scroll application also features cylinder deactivation.[7] This engine is also used in the Aston Martin DB11 and the 2018 Aston Martin Vantage, as part of the agreement between Aston Martin and Daimler AG that began in 2013.[8][9][10][11] In late 2019, the 48V system used in the M176 was added to the newly released models.[12]

Applications

M178

The M178 was the second variation in the family to be released. Initially released in the Mercedes-AMG GT and GT S, it had 345 and 375 kW (469 and 510 PS; 463 and 503 hp), respectively. Later versions have been added for the GT C and GT R models and higher output.[2]

Cylinder arrangement V8

Cylinder angle 90°

Cylinder block alloy Cast aluminium, closed deck

Cylinder head alloy Cast aluminium, zirconium alloy

Valves per cylinder 4 (DOHC)

Variable valve timing Camshaft adjustment on both the inlet and outlet side

Displacement 3,982 cc (4.0 L; 243.0 cu in)

Bore x stroke 83 mm × 92 mm (3.27 in × 3.62 in)

Cylinder spacing 90 mm (3.54 in)

Compression ratio 10.5:1

Output 375 kW (510 PS; 503 hp) at 6,250 rpm [Output per litre 94.2 kW (128.1 PS; 126.3 hp)]

Maximum torque 650 N⋅m (479 lb⋅ft) at 1750 – 4750 rpm [Torque per litre 163.2 N⋅m (120.4 lb⋅ft)]

Maximum engine speed 7,200 rpm

Maximum charge pressure 1.2 bar (17 psi)

Peak engine pressure 130 bar (1,900 psi)

Air delivery Forced induction, 2x twin scroll turbochargers spinning to 186,000 rpm with electronically controlled blow-off valves

Fuel delivery Electronically controlled direct petrol injection with spray-guided combustion, fully variable, fuel pressure 100–200 bar (1,500–2,900 psi)

Coolant delivery 3 phase thermostat, timing chain driven water pump rated 420 litres (110 US gal; 92 imp gal) /min flow

Oil delivery 9 litres (2.4 US gal; 2.0 imp gal) oil, dry-sump, via two-stage controlled suction pump (250 litres (66 US gal; 55 imp gal) /min), a pressure pump and a 12 litres (3.2 US gal; 2.6 imp gal) external oil tank

Oil cooling External engine oil cooler in the front

Charged air cooling Indirect air/water intercooling, cooling 140 °C (284 °F) charged air to 25 °C (77 °F) above outside temperature under full load

Engine weight (dry) 209 kg (461 lb)

Emissions standard Euro 6

NEDC combined consumption Under 10 litres (2.6 US gal; 2.2 imp gal) /100 km (62 mi)

Applications output
Year Model Power At rpm Torque At rpm
2015-2017 GT (C 190) 340 kW (462 PS; 456 hp) 6,000 600 N⋅m (443 lb⋅ft) 1,600-5,000
2017+ GT (C 190) 350 kW (476 PS; 469 hp) 6,000 630 N⋅m (465 lb⋅ft) 1,700-5,000
2015-2017 GT S (C 190) 375 kW (510 PS; 503 hp) 6,250 650 N⋅m (479 lb⋅ft) 1,750-4,750
2017+ GT S (C 190) 384 kW (522 PS; 515 hp) 6,250 670 N⋅m (494 lb⋅ft) 1,800-5,000
2017+ GT C (C 190) 410 kW (557 PS; 550 hp) 5,750-6,750 680 N⋅m (502 lb⋅ft) 1,900-5,500
2017+ GT R (C 190) 430 kW (585 PS; 577 hp) 6,250 700 N⋅m (516 lb⋅ft) 1,900-5,500
2017+ Brabus B40S 478 kW (650 PS; 641 hp) 6,500 820 N⋅m (605 lb⋅ft) 1,750-4,500
2021 GT Black Series 537 kW (730 PS; 720 hp) 6,700-6,900 800 N⋅m (590 lb⋅ft) 2,000-6,000


Applications

See also

List of Mercedes-Benz engines

References
  1. https://www.autoevolution.com/news/mercedes-amg-gt-m178-engine-specs-unveiled-videophoto-gallery-82472.html
  2. "In-Depth With the 2016 Mercedes-AMG GT's New V-8: So Long, Natural Aspiration—Hello, Twin Turbos!". Car and Driver. 2014-07-02. Retrieved 2017-12-07.
  3. http://blog.mercedes-benz-passion.com/2016/10/mercedes-benz-bringt-2017-neue-generation-von-vier-und-sechszylinder-reihenmotoren-bei-benzin-und-diesel-auf-den-markt/
  4. "New Engines Highlight Daimler's Plans for 2018 S-class Update". Car and Driver. 2016-11-14. Retrieved 2017-12-07.
  5. https://media.daimler.com/marsMediaSite/en/instance/ko/The-new-V8-with-48V-ISG-Excitement-on-velvet-paws.xhtml?oid=43613231
  6. http://www.auto-motor-und-sport.de/news/mercedes-c63-amg-auf-dem-autosalon-in-paris-2014-die-power-versionen-der-neuen-c-klasse-5098003.html
  7. "OMG AMG: We Go Inside Mercedes-AMG Headquarters in Affalterbach". Car and Driver. Retrieved 2017-12-07.
  8. Kew, Ollie (25 July 2013). "Aston Martin to use Mercedes AMG V8 engines (2013)". CAR Magazine. Retrieved 19 March 2018.
  9. Edelstein, Stephen (25 July 2013). "Germany and England bury the hatchet: Aston Martin and Mercedes-Benz finalize partnership". Digital Trends. Retrieved 19 March 2018.
  10. Hayward, Matthew (19 December 2013). "V8 advantage – Aston Martin launches 'more affordable' V8 DB11 grand tourer". Daily Telegraph. Retrieved 18 March 2018.
  11. Panait, Mircea (2017-11-16). "2019 Aston Martin Vantage Drifting Teaser Is Slow-Motion Goodness". autoevolution. Retrieved 2018-03-18.
  12. "New Mercedes-AMG GLE 63 S Coupe revealed with 603bhp | Autocar". www.autocar.co.uk. Retrieved 2020-02-27.
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