The differences between the turbine motor and the vane motor are significant. The turbine motor is lighter in weight, does not need lubrication, and has a tremendous amount of stored energy. It develops its power at extreme rotational speeds as high as 60,000 rpm. The turbine motor has an automatic speed limitation controller when in free speed, and is insensitive to moisture due to the use of the most modern composite materials.

150T "F" Series	ST500 Series	ST600 Series	ST700/ST900 Series
For engine displacement of: Diesel–300 to 3600 CID (5 to 60 liters) Carburated–1000 to 7200 CID (16 to 120 liters)	For engine displacement of: Diesel–300 to 6,000 CID (5 to 100 liters) Carburated–600 to 12,000 CID (10 to 200 liters)	For engine displacement of: Diesel–1000 to 5000 CID (16 to 80 liters) Carburated–2000 to 10,000 CID (32 to 160 liters)	For engine displacement of: Diesel–1000 to 20,000 CID (16 to 320 liters) Carburated–2000 to 40,000 CID (32 to 660 liters)