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Generating set, Bergen B33:45

Based on a top modern, modularised design the B33:45 range sets a new industry standard in terms of fuel efficiency, low emission and low life cycle cost.

Defined by our customers

The Bergen B33:45 diesel range carries forward the Rolls-Royce Bergen engine family into a new era. The engine platform offers 600 kW per cylinder in a compact, modularized engine design. The new engine portfolio offers industry leading energy consumption and emission figures.

The Bergen B33:45 liquid fuel engine shares many of the design features to the B36:45 gas engine series, and commonality on many engine components such as the engine block and crankshaft. This allows the flexibility to convert from diesel to gas, or vice versa, depending on our customers need.

In-line engines are offered in 6, 8 and 9 cylinder configurations, spanning a power range from 3,600 kW to 5,400 kW. The V-engine is available as 12, 16 and 20 cylinder configurations with a power range from 7,200 kW to 12,000 kW.

Key features

  • Reliable power
  • Highly efficient fuel and lubricating oil consumption
  • IMO Tier II and Tier III compliant (with SCR)
  • Low life cycle cost
  • Load-dependent maintenance schedule
  • Fast load response
  • Low vibration/structural noise level
  • Full equipment health monitoring

Technical data

Engine type B33:45L6A B33:45L8A B33:45L9A B33:45V12A
Number of cylinders 6 8 9 12
Engine speed r/min 720/750 720/750 720/750 720/750
Mean piston speed m/s 11.25 11.25 11.25 11.25
Max. continuous rating (MCR) kW 3600 4800 5400 7200
Max. continuous rating altern, ( η = 0.97) kW 3492 4656 5238 6950
Max. continuous rating altern, (Cos Ф  = 0.8) kVA 4365 5820 6548 8690
Max. continuous rating altern, (Cos Ф  = 0.9) kVA 3880 5173 5820 7722
Mean effective pressure (BMEP) bar 26/25 26/25 26/25 26/25
Specific fuel consumption (SFOC) g/kWh 175 175 175 176
Specific lubricating oil consumption g/kWh 0.5 0.5 0.5 0.5
Cooling water temp. engine outlet °C 90 90 90 90


Engine ratings are according to ISO 3046/1. The above figures are based on conditions at maximum 45°C ambient air temperature and maximum 32°C sea water temperature. SFOC is based on MDO with a net calorific value of 42.7 MJ/kg and no engine driven pumps, at 85% engine load. At 100% engine load the SFOC will be 177 g/kWh. If engine driven pumps are attached, please add 1 g/kwh for each engine driven pump. 

Principle dimensions

Cylinder diameter 330mm. Piston stroke 450mm.
Engine type A B C D E Engine (kg) Weights dry 
alternator (kg)
Total (kg)
B33:45L6A 3410 5870 9280 2431 4100 46000 18200 64200
B33:45L8A 3505 6940 10445 2488 4250 61100 21000 81100
B33:45L9A 3505 7475 10980 2488 4250 67100 22300  89400
B33:45V12A 4033 6870 10900 3140 4800 85000 25000 110000


Dimensions given apply for resiliently mounted engines.  Choice of alternator will affect the given dimensions and weights. *Subject to approval prior to sale.

Services and support

  • 24/7 Technical support

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

    Contact us:

  • Spares

    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.

How can I help you?

Gary Nutter
EVP - Propulsion and Engines