Engine Mercedes OM447

The Mercedes OM447 engine is the engine used to power Mercedes buses such as the O405 and O408. The robust motor of this series runs smoothly regardless of the conditions in which it is used. OM447 can last a long time (up to 2,000,000 kilometers) if it is properly and promptly maintained.

Engines Mercedes OM 447 have been produced since December 1984. The first modification developed power up to 204 hp (150 kW). Considering that the motor only needs 6 cylinders for this, the volume of which is 12 liters, an excellent value for the specific power is achieved.

A year later, the OM447 engine came out with 280 hp (206 kW). It delivered more torque at low revs and was more efficient than its predecessor. Finally, in 1991, the third modification of the Mercedes OM 447 engines appeared, operating with a power of 299 hp (220 kW). This is the same 12-liter diesel engine, which, however, uses some new technologies to make it more powerful.

Specifications

Power output 150 kW / 204 hp
Displacement 11967 cc
Number of cylinders 6
Valves 12
Manufacturer Mercedes
Compression ratio 16.25:1
Cylinder bore, mm 128
Piston stroke, mm 155
Main bearings 7 pieces
Combustion chamber working volume 122.74 cc
Power Index 21 hp per liter (1000 cc) displacement

Engine Modifications

  1. OM447.905 204 HP
  2. OM447.906 241 hp
  3. OM447.907 241 hp
  4. OM447.908 241 hp
  5. OM447.910 241 hp
  6. OM447.911 204 hp
  7. OM447.913 204 hp
  8. OM447.914 204 hp
  9. OM447.950 280 HP
  10. OM447.951 280 HP
  11. OM447.955 241 hp
  12. OM447.956 241 hp
  13. OM447.957 241 hp
  14. OM447.959 241 hp
  15. OM447.970 204 hp
  16. OM447.971 241 hp
  17. OM447.973 204 hp
  18. OM447.976 241 hp
  19. OM447.978 241 hp
  20. OM447.974 241 hp
  21. OM447.996 241 hp

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