Good point

Good point. With road usage tax, I'll be able to run a massive 5l V8, and pay the same as somebody else running a 1.6

Unless of course, there's going to be some elaborate and complex way of charging based upon engine size.

Oh wait, hang on, don't we already have this with FUEL DUTY?

As I say. Logic fail.

This whole idea is somewhere on the far side of daft.