A fire truck, also known as a ladder truck, carries multiple ground ladders of varying length and purpose; an aerial ladder used to reach upper floors of buildings; rescue equipment for forcible entry, extrication, etc; numerous power tools such as chain saws, ventilation fans, and lighting equipment.
A fire engine, also known as a fire pumper, carries thousands of feet of fire hose, nozzles, hose couplings and other equipment. It also carries 500 gallons of water in a tank for a quick attack on a fire which is critical to fire control until they can establish a dedicated water supply from a fire hydrant.