Rolls-Royce marine diesel engines

Bergen Engines AS is a diesel engine manufacturer based in Bergen, Norway. It makes various ranges of diesel engines for the marine sector. There are three "Bergen" and two Crossley Pielstick ranges with power outputs in the range 1.2MW to 15MW. Formerly part of Rolls-Royce Marine Power Operations, it was merged into Tognum in July 2013, after Tognum had become a 50/50 joint venture between Rolls-Royce and Daimler AG.

The company started as a shipbuilding business called Bergen Mekaniske Verksted (BMV) in 1855 in Bergen, Norway. BMV built both ships and steam engines to propel them. In 1942, BMV established their diesel engine division, but due to World War II a design was not completed before 1946. Engines were delivered in 1946 and -47 to the vessels MS Draupne and MS Arcturus. In 1984 the diesel engine division was spun off into its own company, BMV Maskin AS. It was acquired by Ulstein the following year and renamed Bergen Diesel AS.

In 1999 Ulstein Group was bought out by Vickers plc - Vickers was subsequently acquired by Rolls-Royce the same year. Rolls-Royce proceeded to rename every Ulstein subdivision to Rolls-Royce Marine, with Bergen Diesel being named Rolls-Royce Marine Engines - Bergen.

In March 2011 Rolls-Royce and Daimler launched a takeover for Tognum. The two companies announced on 24 June 2011 that their joint €3.4 billion tender offer had been successful, with 94% of Tognum shareholders accepting. Tognum is now run as a 50-50 joint venture, with Rolls-Royce contributing Bergen diesel engine technology to the Tognum operation.

The Bergen marine diesel ranges are denoted by the letters C, B and K and are broadly divided by the power output as follows:

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