| Mercedes-Benz M118 | |
| Manufacturer: | Audi |
| Production: | September 1965 – July 1972 |
| Successor: | Volkswagen EA827 engine |
| Configuration: | Inline 4 |
| Bore: | 80mm |
| Stroke: | 84.4mm |
| Block: | Cast iron |
| Head: | Cast iron |
| Valvetrain: | OHV |
| Fuelsystem: | Carburetor |
| Fueltype: | Gasoline |
| Coolingsystem: | Water cooled |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
The M118 is a four-stroke inline-four engine produced from 1965 to 1972.
The M118 was originally developed by Mercedes-Benz for the mass-produced vehicle segment.[1] It was first used by Audi in the F103, after Daimler AG sold the company to Volkswagen.[2] 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.[3] It was later revised several times with increased displacements and reduced compression ratios for improved reliability.[4] The success of the M118 allowed Audi to expand into more upscale market segments.[5] 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.
| Displacement | Power | Torque | Years | |
|---|---|---|---|---|
| 1496cc | 400NaN0 at 4,750 rpm | 1130NaN0 at 2,600 rpm | 1968–1972 | |
| 1697cc | 530NaN0 at 5,000 rpm | 1270NaN0 at 2,800 rpm | 1965–1968 | |
| 550NaN0 at 5,000 rpm | 1270NaN0 at 3,000 rpm | 1968–1972 | ||
| 590NaN0 at 5,000 rpm | 1320NaN0 at 5,000 rpm | 1966–1968 | ||
| 1760cc | 660NaN0 at 5,300 rpm | 1470NaN0 at 3,000 rpm | 1966–1971 |
40 kW version
53 kW version
55 kW version
59 kW version
66 kW version