Unregistered cars on private property

I have a race car on my private property in Rhode Island and my neighbor wants to call the town because it’s against ordinance to have unregistered cars in your yard. Town says I cannot store them on my registered trailer either (I called and asked anonymously) is there any loophole to this that protects me. Someone told me if it has numbers on it it’s exempt from those rules because of a law Rhode Island has regarding race cars but I can’t find it. Any information is greatly appreciated!