Originally Posted By: OilyWaterMIXER
When the internal combustion engine was invented, the term "motor" was initially used to distinguish it from the steam engine—which was in wide use at the time, powering locomotives and other vehicles such as steam rollers. "Motor" and "engine" later came to be used interchangeably in casual discourse. However, technically, the two words have different meanings. An engine is a device that burns or otherwise consumes fuel, changing its chemical composition, whereas a motor is a device driven by electricity, air, or hydraulic pressure, which does not change the chemical composition of its energy source.
I always had the impression that it had to do with the size of the device as well. We say "steam ENGINE," not "steam motor," and "electric MOTOR," not "electric engine." Though the British refer to car engines often as "motors," and refer to "going motoring" when driving, not "going engine-ing" (which would be awkward). Perhaps "motor" arose from the sense of "that which moves or causes to move," like the "motor system" part of the central nervous system?
Would a windmill or water wheel technically be a motor, operated by air or water pressure?
When the internal combustion engine was invented, the term "motor" was initially used to distinguish it from the steam engine—which was in wide use at the time, powering locomotives and other vehicles such as steam rollers. "Motor" and "engine" later came to be used interchangeably in casual discourse. However, technically, the two words have different meanings. An engine is a device that burns or otherwise consumes fuel, changing its chemical composition, whereas a motor is a device driven by electricity, air, or hydraulic pressure, which does not change the chemical composition of its energy source.
I always had the impression that it had to do with the size of the device as well. We say "steam ENGINE," not "steam motor," and "electric MOTOR," not "electric engine." Though the British refer to car engines often as "motors," and refer to "going motoring" when driving, not "going engine-ing" (which would be awkward). Perhaps "motor" arose from the sense of "that which moves or causes to move," like the "motor system" part of the central nervous system?
Would a windmill or water wheel technically be a motor, operated by air or water pressure?