Certainly different. Not sure if the propeller would be legal, although if you could turn it around change the propeller to a prop shaft. Wonder what that sounds like? Couldn't sneak out on an early sunday cruise without being heard I'm sure.
I saw a car in Guildford around 2002. it was a long car, like an estate but american, have a 27 litre merlin engine in it. Sounded like a bag of bolts, I guess a lot of tappets involved.