Mercedes-Benz OM 138
Technical data

Mercedes-Benz OM 138

Section Title: Technical data
Table Section Text: None

OM 138

Configuration	inline-four-cylinder

Engine type	diesel

Fuel system	precombustion chamber injection

Valvetrain	OHV: 1 × inlet, 1 × outlet valve

Bore × Stroke	90 mm × 100 mm (3.54 in × 3.94 in)

Displacement	2.5 L; 155.3 cu in (2,545 cc)

Rated rotational speed	car engines: 3000 rpm truck engines: 2800 rpm

Rated power	33 kW (45 PS)

Torque at rated rotational speed	car engines: 105.35 N⋅m (77.70 lb⋅ft) truck engines: 112.88 N⋅m (83.26 lb⋅ft)

Average working pressure	5.2 bar (75 psi)

Compression ratio	20.5:1

Oil	5 L (5.3 US qt; 4.4 imp qt)

Mass	300 kg (661 lb)

Power-displacement-ratio (kW : dm3)	13 : 1

Fuel consumption (In the W 138)	10–11 L (11–12 US qt; 8.8–9.7 imp qt) Diesel oil

Sentence(s)

The bore and the stroke is 90 mm × 100 mm (3.54 in × 3.94 in), this gives the OM 138 a rotational speed of 3000 rpm and 2800 rpm as a truck engine.

final_sentence: The bore and the stroke is 90 mm × 100 mm (3.54 in × 3.94 in), this gives the OM 138 a rotational speed of 3000 rpm and 2800 rpm as a truck engine.