Originally posted by Racer X 69 Just like people who call the thing under the hood of their car a "motor".
It isn't a motor, it is an engine.
Big difference.
Hate to be 'that guy', but both are correct, in both American and British English
A motor can be anything that imparts motion - a 'motion-er' so to speak. You can compare here both American and British usage, which both specify an automobile motor/engine (in British it is also a colloquial term for a car as a whole by the way):
Motor definition and meaning | Collins English Dictionary
An Engine is more specific in modern usage, but historically is any kind of machine (such as a seige engine). Nowadays it is mostly used for cars and such, but also the entire front end of a train and of course steam engines, which use an external power source.
Engine definition and meaning | Collins English Dictionary
English is a fantastic language, mainly because it is actually very vague and flexible and can rarely be pinned down to 'correct' or 'incorrect' such as you attempted there... In the end, 'correct' is whatever people commonly use and incorrect is whatever people commonly believe is wrong. There is no prescriptive authority to define what words do and don't mean unlike, for example, French. So if many people use 'motor' as you use 'engine', then they are correct and so are you and both will end up in the dictionary. Just like LOL and cellphone and twerk have...which is why it evolves and remains useful over time.