The M115 engine family was a straight-4 automobile engine from Mercedes-Benz in the 1970s. The same engine was produced in several versions with differing volume, compression, and horse power according to its application.
The M115.920 is a 2.2 L engine with a power output 103-105 hp
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The M115.921 is a 2.3L 85 hp engine.
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The M115.923 is a 2.0 L (1988 cc) 95 hp (70 kW) engine.
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The M115.924 is a 90-120 hp engine, depending on compression. The 90 hp is 2200 cc (66 kW).
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The M115.926 is an 86-95 hp (63 kW-70 kW) engine, depending on compression.
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The M115.938 is a 2.0 L (1988 cc) engine with an 87 mm bore and 83.6 mm stroke. Power output was 94 hp (70 kW).
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The M115.939 is a 2,0/84 hp engine with reduced compression, which follows from a different head. Was e.g. built for export to Switzerland
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The M115.951 is a 110 hp engine.
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The M115.952 is a 2.3 L (2277 cc) engine with 89 hp.
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The M115.954 is a 2.3 L (2307 cc) version with a 93.8 mm bore and the same 83.6 mm stroke. Power output was 109 hp (81 kW).
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