A Revolutionary Way to Travel

It's a bird!  It's a plane!  No, it's an engine-mobile!!  Say what?  Today, while in the van on the ride home, my son was asking me, "Mom, is a motor the same as an engine?"  I said, "I think so."  "Well, then why isn't a motorcycle called an 'engine-cycle'?"  Good question!  Then I said, "Well, what about an 'engine-mobile'?"  Makes me wonder how and why things got their name.  So, next time someone brags to you about their fancy new car, just one-up them with lofty talk about your revolutionary "Engine-Mobile!!"