The Volvo Penta TWD1644GE diesel engine is an inline 6-cylinder, 16.12-liter displacement, 4-stroke diesel generator set with EFI, twin-turbocharge and dual-air intercooling. TWD1644GE is a two-speed engine, with two speed modes of 50hz / 1500 rpm and 60hz / 1800 rpm, used for main and standby power generation.