 Rolls-Royce Marine Engines (formerly Bergen Diesel), Pielstick and Wärtsilä (formerly Wichmann) have made this type of engine.Straight-nine engines in current production include models in the Rolls-Royce Bergen B, C and K series, and the Wärtsilä RT-flex60C-B, RT-flex82C, RTA84T-D, RTA84C, RTA96C, 20, 26, 32, Wasa32LN, 38, 46 and 46F series.The nine cylinder versions of these engines develop power outputs from to .