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New Mercedes Benz diesel engine…OM 651: completely new design

May 31st, 2009
The four-cylinder OM 651 diesel engine is a completely new design. It only shares its overall displacement of 2.15 liters with its predecessor (to be precise: 2143 cc, predecessor 2149 cc). It has a completely different geometry, however. While the bore and stroke were previously roughly square, the new engine is a long-stroke unit with [...]