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| Mercedes-Benz M110 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1972–1986 |
| Layout | |
| Configuration | Naturally aspirated Straight-6 |
| Displacement | 2.7 L (2,746 cc) |
| Cylinder bore | 86 mm (3.39 in) |
| Piston stroke | 78.8 mm (3.10 in) |
| Valvetrain | DOHC 2 valves x cyl. |
| Compression ratio | 9.0:1 |
| Combustion | |
| Fuel system | Solex 4A1 carburetor Fuel injection |
| Management | Bosch Jetronic |
| Fuel type | Gasoline |
| Oil system | Pressure circulation |
| Cooling system | Water cooled |
| Output | |
| Power output | 105–136 kW (143–185 PS; 141–182 hp) |
| Torque output | 226–240 N⋅m (167–177 lb⋅ft) |
| Chronology | |
| Predecessor | M180 |
| Successor | M103 |
The M110 engine family is a DOHC (double overhead cam) crossflow cylinder head design with 2 valves per cylinder straight-6 automobile engine made by Mercedes-Benz in the 1970s and 1980s.
The M110.92x and .93x engines are carburetor engines, with Solex 4A1 carburetor.
The M110.98x and .99x engines are fuel-injected engines, with Bosch D-Jetronic up to the .983 and K-Jetronic from the .984.
All M110 engines have a displacement of 2.7 L; 167.6 cu in (2,746 cc) and a bore and stroke of 86 mm × 78.8 mm (3.39 in × 3.10 in). Firing order is 1-5-3-6-2-4. Amount of coolant in the radiator was 11 litres (2.9 US gal; 2.4 imp gal) from 1972 and 12 litres (3.2 US gal; 2.6 imp gal) from 1980s and on. Amount of oil (lubricant) in engine was 6 litres (1.6 US gal; 1.3 imp gal). Lubrication system was pressure circulation lubrication system. Number of valves was 1 intake, 1 exhaust with V-shaped overhead configuration, acted by rocker arms. Valve operation was 2 top camshafts and camshaft drive was duplex roller-type chain.
The M110 .92x and .93x carburetor engines were replaced by the SOHC 2.6L M103 while .98x and .99x fuel-injected engines were replaced by 3.0L M103 starting in 1986.