Diesel engine - U25/651
Turbodiesel engine - U25/673
Working volume - 2.5 l
Number of cylinders - 4
The cylinders are arranged in-line
Position - Transverse position, with a forward tilt of 23°.
Valve control - Camshaft in the cylinder block, tappets, tappet rods and hanging valves. Control via rocker arms.
Fuel injection sequence is 1-3-4-2
Cylinder bore: 93.00 mm
Piston stroke: 92.00 mm
Compression ratio: 22.25:1
Maximum power (DIN):
- Diesel engine - 54 kW (75 hp) at 4250 rpm
- Turbodiesel engine - 70 kW (95 hp) at 3700 rpm
Maximum torque (DIN):
- Diesel engine - 157 Nm at 2250 rpm
- Turbodiesel engine - 220 Nm at 2000 rpm
Maximum no-load speed:
- Diesel engine - 4625±125 rpm
- Turbo diesel engine - 4600±150 rpm
Engine speed under load:
- Diesel engine - 4250±50 rpm
- Turbodiesel engine - 3900 rpm
Oil pressure (at an oil temperature of 95°C):
- at 1000 rpm - 2.5 bar
- at 3500 rpm - 4.5-5.0 bar
Idle speed: 800±25 rpm
Valve control
- Intake valve opening: 2°52' after TDC
- Intake valve closing: 33°08' after TDC
- Exhaust valve opening: 37°48' before TDC
- Exhaust valve closing - 4°12' before TDC
- With a theoretical valve clearance of 1.0 mm
Valve clearances (the engine is cold):
- Inlet valves - 0.30 mm
- Exhaust valves - 0.20 mm
Valve control
Camshaft and high pressure fuel pump drive. Toothed belts. Separate tensioners for the camshaft belt and the high-pressure fuel pump belt.