A buddy of mine came to Denver to pick up a Bimoto Mantra. He had no problem fitting it into a Honda Odyssey. I think that gets pretty good gas mileage. But I do think the C14 is taller then the Mantra.
I have an Odyssey, gets about 20MPG, not too bad, but if you take the middle seats out and fold down the rear seats, I have put 4x8 sheets of plywood in there. Only about 4 1/2 feet of head room, I thought about putting the C-10 in back by removing the wind sheild, but I have never tried.....