The Mercedes-Benz OM 660 is a 0.8-litre turbocharged straight-three Diesel engine produced by DaimlerChrysler and later MDC Power for use in Smart vehicles, from 1999 to 2014.
Design The OM660 features a single-overhead camshaft with two valves per cylinder and an aluminium alloy cylinder block and head. It is turbocharged and features an exhaust gas recirculation system. The OM660 was updated in 2007 receiving increased performance due to a new common rail fuel system with increased boost pressure, and again in 2011 featuring further performance and efficiency improvements.
Models EnginePowerTorqueYearsOM660 @ 4,200 rpm @ 1,800–2000 rpm1999–2006 @ 3,800 rpm @ 2,000–2,500 rpm2007–2009 @ 3,800 rpm @ 2,100 rpm2009–2014
OM660 (30 kW version) 1999–2006 W450 Smart Fortwo
OM660 (33 kW version) 2007–2009 W451 Smart Fortwo
OM660 (40 kW version) 2009–2014 W451 Smart Fortwo
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