The Engine also known as The Eternal Engine is the propulsion method of Snowpiercer. The Engine is a perpetual motion machine that propels the train forward without any obvious need for fuel or maintenance. The secondary function of the Eternal Engine is also that of a powerplant for car bogie-motors and on-board batteries. As such, the speed of the train is directly tied to its power supply.
Big Alice also known as Engine Eternal Prototype is the propulsion method of secondary supply train of the same name. The Engine is a perpetual motion machine that propels the train forward without any obvious need for fuel or maintenance. The secondary function of the Eternal Engine is also that of a powerplant for car bogie-motors and on-board batteries. As such, the speed of the train is directly tied to its power supply.