660.940 engine — Smart 0.8 CDI (0.8L)
0.8L · 41 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | 660.940 |
| Capacity | 799 cc |
| Idle speed | 900 rpm |
| Normal | 18.5 bar |
| Max. compression loss between cylinders | 25 % |
| Oil pressure | 4.0 - 4.5 / 900 bar/rpm |
| Oil pressure | 2.0 - 2.5 / 900 bar/rpm |
Engine (diesel)
| Exhaust gas analysis | Euro 3: < 2.5\x0AEuro 4: < 1.5 m-1 |
Electrical
| Alternator | 85 A |
Capacities
| Engine sump, incl. filter | 2.7 l |
| Gearbox refill | 1.4 l |
| Cooling system | 4.5 l |
| Air-conditioner refrigerant | 590 - 615 (-> 02/01/2003) 400 - 450 (03/01/2003 ->) g |
| Air-conditioner compressor oil | 180 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 30 Nm |
| Cylinder head bolts — Stage 2 | 90 ° |
| Cylinder head bolts — Stage 3 | 90 ° |
| Cylinder head bolts — Stage 4 | 90 ° |
| Cylinder head bolts — Stage 5 | 10 ° |
| Cylinder head bolts — Stage 6 | 27 Nm |
| Glow plugs | 15 Nm |
| Oxygen sensor | 50 Nm |
| Wheel nuts | 110 Nm |
| Front hub | 120 Nm |
Emissions
| Emission code | 70/220*2001/100A |
| Emission standard | Euro 3 (10/2003 ->) |
| CO2 average | 90 g/km |
| CO | 0.144 g/km |
| NOx | 0.418 g/km |
| HC NOx | 0.432 g/km |
| Particles | 0.037 g/km |
| Emission code | 70/220*2003/76B |
| Emission standard | Euro 4 (11/2005 ->) |
| CO2 average | 101 g/km |
| CO | 0.060 g/km |
| NOx | 0.214 g/km |
| HC NOx | 0.226 g/km |
| Particles | 0.022 g/km |
| Emission code | 70/220*1998/77 |
| Emission standard | Euro 3 |
| CO | 0.201 g/km |
| HC NOx | 0.406 g/km |
| Particles | 0.036 g/km |
| Emission code | 70/220*1999/102A |
| CO | 0.144 - 0.158 g/km |
| Particles | 0.037 - 0.044 g/km |
| Emission code | 70/220*2001/1A |
| Emission standard | Euro 3 (11/2002 ->) |
| CO2 average | 90 - 95 g/km |
| CO | 0.144 - 0.168 g/km |
| NOx | 0.406 - 0.418 g/km |
| HC NOx | 0.430 - 0.432 g/km |
| Particles | 0.034 - 0.037 g/km |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.