Mercedes-Benz OM 86

The Mercedes-Benz OM 86 was a high-speed twelve-cylinder four-stroke diesel engine from Mercedes-Benz for the fast railcars of the Deutsche Reichsbahn. It was first used in 1937, was called MB 806 from 1938, and was installed in five pre-war railcars. It was the further development of the Mercedes-Benz OM 85, and the gain in output came from a larger cylinder diameter. Compared with the diesels of Maybach and MAN that dominated railcar building, it had several design changes: a crankcase of Silumin, cylinders cast in groups of three and bolted to it, and forked connecting rods on the right bank. It was naturally aspirated with pre-chamber injection. After the war the line continued in the Mercedes-Benz MB 836 series. Two of the railcars ran until 1965 on the Deutsche Bundesbahn and until 1976 on the Deutsche Reichsbahn of the GDR, though the engines they used then are not recorded.