Yes, and at one time (long ago - in the time before the Prius) I would have wholeheartedly agreed with you. But today, with electric motors and batteries into the mix, the size of the eventual engine has less and less meaning. A better measure now would be how much power it can deliver to the road if you have to use anything other then size.... however you understand what I'm saying.
So yes, it was an half joke, but only half...