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Bergen B36:45L generating set

Choose Rolls-Royce Bergen engines for cost-effective operation

The Bergen B-series is based on a modular design, which gives a flexible platform and at the same time carries forward the Bergen traditional values as a robust and reliable engine.

09.Engines 2p B36 45L Genset 12.02.jpg

The selection of technology was done after consulting a broad range of operators, designers and shipbuilders, to establish the qualities they prize in an engine. This engine series was first introduced to the market in 2014 as a diesel engine, and the gas version followed in 2018. It is available in several in-line or Vee cylinder variants for both diesel and gas, and is equally suitable for mechanical transmission or as a marine generating set.

Main benefits for ship yards:

  • Easy installation
  • Aligned piping at pump-end for easy connection
  • New resilient mounting (no need of welding brackets)

Main benefits for ship owners:

  • IMO Tier III compliant without SCR
  • Single fuel = single bunkering
  • No lubricating oil separator needed
  • Fast load response
  • Cleaner engine room and no smoke emission
  • Extremely low methane slip at all engine loads
  • Cylinder Pressure Monitoring (CPM) for improved load control, and possibility for diagnostics per cylinder
  • Exceptionally low emissions of NOx, CO2, SOx and particulate
  • No “switch over” problems - ref ECA or port regulations
  • Long-term compliance with local port regulations and potential benefits from taxation/green port dues
  • VVT – Variable Valve Timing for optimum response and load increase
  • Gas safe (double wall piping)
  • Possible conversion from gas to diesel and vice versa
  • Wastegate turbocharger to ensure optimised fuel/air ratio at varying ambient conditions for lean-burn operation


ENGINE TYPE B36:45L6A B36:45L8A B36:45L9A
Number of cylinders 6 8 9
Engine speed r/min 720/750 720/750 720/750
Mean piston speed m/s 10.8/11.2 10.8/11.2 10.8/11.2
Max.cont rating (MCR) kW 3450/3600 4600/4800 5175/5400
Max.cont rating altern, (h=0.97) kWel 3347/3492 4462/4656 5020/5238
Max.cont rating altern, (Cos f=0.8) kVa 4184/4365 5576/5820 6275/6548
Max.cont rating altern, (Cos f=0.9) kVa 3833/4000 4958/5173 5578/5820
Mean effective pressure (BMEP) bar 21 21 21
Specific energy consumption kJ/kWh 7420 7420 7420
Specific lubricating oil consumption g/kWh 0.4 0.4 0.4
Cooling water temp. engine outlet oC 90 90 90
  • The performance data is based on: Marine gas engine ratings are according to ISO 3046-1, at maximum 45°C ambient air temperature and maximum 32°C sea water temperature. Specific fuel gas consumption given at 100% load and no engine driven pumps, running on natural gas with Methane number above 70 and net calorific value of 36 MJ/nm3. To include 3 engine driven pumps, add 1.3%. Gas feed temperature is 20-40°C. Minimum gas feed pressure to Gas Regulating Unit to be 5,5 barg.
  • Waste heat recovery: Necessary data for arranging waste heat recovery plants (exhaust gas and cooling water) are available upon request.
  • Note: Due to continuous development, some data may be changed without notice.
B36:45L6A 3700 5700 9400 2840 4100 48300 kg 17000 kg
B36:45L8A 3800 6600 10400 3045 4400 60600 kg 20700 kg
B36:45L9A 3850 7050 10900 3045 4400 62400 kg 21600 kg

* Weight dry engine excludes generator.

Services and support

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    Our 24/7 technical support team is there to help at any time, day or night, wherever your vessel is.

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    We understand the importance of having the right parts, available in the right place, at the right time.

  • Training

    Ensure that your crew is properly and thoroughly trained. This will reduce operational risk, downtime and maximise return on asset investment.

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Rolls-Royce Bergen engines


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Kongsberg Maritime

is the exclusive distributor of Rolls-Royce medium speed engines for commercial marine applications

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