Volvo Penta (Volvo Penta) TAD531GE diesel engine is a mechanically adjustable, turbocharged and air-cooled in-line 4-cylinder, 4.76-liter displacement, 4-stroke diesel generator engine. TAD531GE is a two-speed engine, with two speed modes of 50hz / 1500 rpm and 60hz / 1800 rpm, used for main and standby power generation.