| Mercedes-Benz OM660 | |
| Manufacturer: | Mercedes-Benz |
| Production: | 1998 – 2015 |
| Configuration: | Straight-three engine |
| Displacement: | 799cc |
| Bore: | 65.5mm |
| Stroke: | 79mm |
| Block: | Aluminium alloy |
| Head: | Aluminium alloy |
| Valvetrain: | SOHC 2 valves x cyl. |
| Compression: | 18.5:1 |
| Turbocharger: | Single-turbo |
| Fuelsystem: | Direct injection Common rail |
| Fueltype: | Diesel |
| Coolingsystem: | Water cooled |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
The OM660 is a 0.8-litre turbocharged straight-three Diesel engine produced by Mercedes-Benz for use in Smart vehicles, from 1999 to 2014.
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,[1] and again in 2011 featuring further performance and efficiency improvements.[2]
| Engine | Power | Torque | Years |
|---|---|---|---|
| OM660 | 300NaN0 @ 4,200 rpm | 1000NaN0 @ 1,800 rpm | 1999–2006 |
| 330NaN0 @ 3,800 rpm | 1100NaN0 @ 2,000–2,500 rpm | 2007–2009 | |
| 400NaN0 @ 3,800 rpm | 1300NaN0 @ 2,100 rpm | 2009–2014 |