| Mercedes-Benz M180 | |
|---|---|
 M130 engine of a 1971 280SL | |
| Overview | |
| Manufacturer | Daimler-Benz |
| Designer | Wolf-Dieter Bensinger[1] |
| Production | 1951-1985 |
| Layout | |
| Configuration | Inline-6 |
| Displacement |
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| Cylinder bore |
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| Piston stroke |
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| Valvetrain | SOHC 2 valves x cyl. |
| Combustion | |
| Fuel system | Solex carburetor Mechanical fuel injection |
| Management | Bosch D-Jetronic |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 80–134 bhp (60–100 kW; 81–136 PS) |
| Chronology | |
| Predecessor |
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| Successor |
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The Mercedes Benz M180 engine was a 2.2 L; 134.0 cu in (2,196 cc) single overhead camshaft inline-6 cylinder engine introduced at the Frankfurt Motor Show in April 1951 to power the company's new 220 (W187). It was the first engine with a cylinder bore greater than its stroke that Mercedes had installed in a production car, while using a reverse-flow cylinder head .
It spawned four variants through 1968, the final and largest being the 2.8 L M130. It was achieved by boring out and stroking the M180's original "over-square" bore × stroke of 80 mm × 72.8 mm (3.15 in × 2.87 in) 2.2 L; 134.0 cu in (2,196 cc) to 86.5 mm × 78.8 mm (3.41 in × 3.10 in), yielding a displacement of 2.8 L; 169.5 cu in (2,778 cc).
Mercedes also unveiled at the 1951 Frankfurt Motor show a larger 3.0-litre M186 ‘big six’ inline-6 to power its new flagship 300 (W186) Adenauer four-door saloon.
While sharing many design features such as staggered valve arrangement and rockers running off a single overhead camshaft driven by a duplex cam-chain, the engines were of completely different design with little or no inter-changeability of parts.[2]
- ^ Hege, John B. (2006). The Wankel rotary engine : a history. Jefferson: McFarland & Co. p. 134. ISBN 978-0-7864-2905-9.
- ^ Six Appeal, Mercedes Enthusiast, May 2007, pp 52-58