MAN B&W Diesel L-V 20 / 27 DG

Bore 200 mm

The engine ratings given in the table are valid for natural gas with a methan number of min. 85. Energy consumption tolerance +5%
Stroke 270 mm
Speed 1 000 / 900 rpm
Mean eff. pressure 12.7 bar
Piston speed 9.0 / 8.1 m/s
Engine type

1 000 rpm 50 Hz

900 rpm 60 Hz

Eng. kW

Gen. kW

Eng. kW

Gen. kW
5L 20/27 DG

450       

435       

405       

390       
6L 20/27 DG

540       

500       

485       

450       
7L 20/27 DG

630       

585       

565       

525       
8L 20/27 DG

720       

670       

650       

605       
9L 20/27 DG

810       

755       

730       

680       
12L 20/27 DG

1 080       

1 015       

970       

910       
14L 20/27 DG

1 260       

1 185       

1 135       

1 065       
16L 20/27 DG

1 440       

1 355       

1 295       

1 220       
18L 20/27 DG

1 620       

1 525       

1 460       

1 370       


Specific energy consumption   8 900 kJ/kWh
Pilot fuel consumption per hour   1.5 kg/cyl.
Fuel oil consumption in Diesel L 20 / 27 DG 200 g/kWh
Fuel operation 100 % P V 20 / 27 DG 199 g/kWh
Lube oil consumption in dual-fuel operation approx. 0.7 g/kWh

Engine type

Length (mm)

Width (mm)

Height (mm)

Mass (t)
5L 20/27 DG

2 700       

1 350       

1 900       

5.4       
6L 20/27 DG

3 000       

1 330       

1 900       

6.1       
7L 20/27 DG

3 280       

1 330       

1 950       

6.8       
8L 20/27 DG

3 525       

1 350       

2 120       

7.7       
9L 20/27 DG

3 800       

1 350       

2 120       

8.4       
12V 20/27 DG

3 940       

1 510       

2 750       

11.0       
14V 20/27 DG

4 350       

1 510       

2 750       

12.2       
16V 20/27 DG

4 700       

1 510       

2 750       

13.5       
18V 20/27 DG

5 050       

1 510       

2 750       

14.8       


Engine Characteristics

High mechanical efficiency

Environment friendly

  • Low exhaust gas emission values achieved using oxidation catalyser,
  • If required, and provided the conditions are correct, an SCR catalyser for further reductions in NOx levels can be fitted.

Low maintenance requirement thanks to service friendly design.

Smooth switching from gas to Diesel operation at full load without fluctuations in engine output or speed.

This means :

  • Double reliability of supply
  • Low energy costs achieved by
    • Concluding gas contracts which can be suspended
    • Gas-peak lopping
    • Power-peak lopping by higher outputs in Diesel operation.


L 20/27 DG dual-fuel genset with cooling
by means of tubular heat exchangers.


V 20/27 DG dual-fuel genset with cooling
by means of tubular heat exchangers.