Taxing 4x4s is not jealousy, as your correspondent suggests. It is just making the obvious an unfair target.

The real problem is big cars with big engines use more fuel per unit distance than smaller ones and thus generate more pollution as a result.

I would argue that taxing a 4x4 with a 1.6 engine doing 35 mpg, while leaving three-litre BMWs, Mercedes and the like which struggle to make 25mpg untaxed would be very unfair.

If the object is solely to move people around, then efficiency ought to be the criteria, not the number of driven wheels.

-Rod Main, Newhaven