The Dash 8-40CW is powered by a V16 7FDL diesel engine driving a GE GMG187 main alternator.
Depending on customer options, the Dash 8-40CW carries approximately 5000 US gallons (18927 L) of diesel fuel, 410 US gal (1,552 L) of lubricating oil, and 380 gallons (1,438 L) of coolant.