| Mercedes-Benz M118 | |
|---|---|
 | |
| Overview | |
| Manufacturer | Audi |
| Also called |
|
| Production | September 1965 – July 1972 |
| Layout | |
| Configuration | Inline 4 |
| Displacement |
|
| Cylinder bore | 80 mm (3.15 in) |
| Piston stroke | 84.4 mm (3.32 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Cast iron |
| Valvetrain | OHV |
| Compression ratio |
|
| Combustion | |
| Fuel system | Carburetor |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 40–66 kW (54–90 PS; 54–89 hp) |
| Torque output | 113–147 N⋅m (83–108 lb⋅ft) |
| Chronology | |
| Successor | Volkswagen EA827 engine |
The M118 is a four-stroke inline-four engine produced from 1965 to 1972.
Design
The M118 was originally developed by Mercedes-Benz for the mass-produced vehicle segment. It was first used by Audi in the F103, after Daimler AG sold the company to Volkswagen. The engine replaced the previous two-stroke engines, featured a Solex carburetor, and utilised a swirling effect in the intake ducts that allowed for smoother operation and enhanced efficiency. It was later revised several times with increased displacements and reduced compression ratios for improved reliability. The success of the M118 allowed Audi to expand into more upscale market segments. On the basis of OHV 4 cylinder M118 engine, Volkswagen engineers created modified 2.0 SOHC unit called VW EA831, that was later used in Audi 100 (C2, 1976–1982), Volkswagen LT and eventually in the Porsche 924.
Engines
| Displacement | Power | Torque | Years |
|---|---|---|---|
| 1.5 L; 91.3 cu in (1,496 cc) | 40 kW (54 PS; 54 hp) at 4,750 rpm |
113 N⋅m (83 lb⋅ft) at 2,600 rpm |
1968–1972 |
| 1.7 L; 103.6 cu in (1,697 cc) | 53 kW (72 PS; 71 hp) at 5,000 rpm |
127 N⋅m (94 lb⋅ft) at 2,800 rpm |
1965–1968 |
| 55 kW (75 PS; 74 hp) at 5,000 rpm |
127 N⋅m (94 lb⋅ft) at 3,000 rpm |
1968–1972 | |
| 59 kW (80 PS; 79 hp) at 5,000 rpm |
132 N⋅m (97 lb⋅ft) at 5,000 rpm |
1966–1968 | |
| 1.8 L; 107.4 cu in (1,760 cc) | 66 kW (90 PS; 89 hp) at 5,300 rpm |
147 N⋅m (108 lb⋅ft) at 3,000 rpm |
1966–1971 |
M118
40 kW version
- 1968–1972 Audi 60
53 kW version
- 1965–1968 Audi 72
55 kW version
- 1968–1972 Audi 75
59 kW version
- 1966–1968 Audi 80
66 kW version
- 1966–1971 Audi 90
References
- Patrascu, Daniel (2018-04-12). "Mercedes-Benz Remembers It Helped Create Audi of Today". autoevolution. Retrieved 2018-08-28.
- Torchinsky, Jason. "How This Gorgeous Mercedes Prototype Made Modern Volkswagen Possible". Jalopnik. Retrieved 2018-08-28.
- "1965 Audi 72 | Hagerty – Classic Car Price Guide". www.hagertyinsurance.co.uk. Retrieved 2018-08-28.
- "Sixty Years Ago, Daimler-Benz Bought Auto Union". Road & Track. 2018-04-12. Retrieved 2018-08-28.
- Oswald, Werner (2001). Deutsche Autos 1945–1990, volume 4 (in German). Motorbuch Verlag. p. 264. ISBN 3-613-02131-5.
- "Mercedes Made Audi Into What It Is Today". Motor1.com. Retrieved 2018-08-28.
- "History's irony: Mercedes created the Audi we know today - MercedesBlog". MercedesBlog. 2016-05-04. Retrieved 2018-08-28.