Is there a difference between engine and motor? A motor car eg has it a motor or an engine?
That had me guessing, too. We talk about "engine trouble" but we also have the"motor car". So, I did a search and found that now they are almost interchangeable. See what the MIT professor says here: http://engineering.mit.edu/ask/what%E2%80%99s-difference-between-motor-and-engine
I hope that helps a little. If anyone else wants to weigh in to clarify this please do.
So, true. I think I'll start paying more attention now when the subject of "engine" or "motor" comes up to see how they're used in everyday speech.