7 Technical Data

General technical information is listed in Table "General Technical Information" .
Description
4-Cylinder Engines
6-Cylinder Engines
904
924
906
926
Engine Type
Vertical, inline cylinder block with turbocharger and charge-air cooler
Cooling System
Liquid Circuit
Combustion Principle
4-Stroke direct-injection diesel
Number of Cylinders
4
6
Bore
4.02 in
(102 mm)
4.17 in
(106 mm)
4.02 in
(102 mm)
4.17 in
(106 mm)
Stroke
5.11 in
(130 mm)
5.35 in
(136 mm)
5.11 in
(130 mm)
5.35 in
(136 mm)
Displacement (total)
259 in³
(4.25 liters)
262 in³
(4.8 liters)
389 in³
(6.37 liters)
439 in³
(7.2 liters)
Compression Ratio
18.0:1
17.5:1
Starting Speed
Approximately 100 rpm
Direction of Engine Rotation (viewed from flywheel)
Counterclockwise
Starter
Electric Motor
Cold-Start Temperature Limit (Without starting aids and with battery 75% charged)
The engine starts quickly without additional cold start device in temperatures down to -15°C (+5°F).
An optional grid heater provides easy starting in extreme temperatures down to -25°C (-13°F).
For temperatures below -25°C (-13°F) an optional grid heater with preheating for coolant and lube oil is available.
Table , General Technical Information