Plenty of tax free Lexus's, and Jaguars come pretty cheap, road tax wise (free in the first year, £20 a year thereafter) Take a look: http://www.nextgreencar.com/car-tax/make-model/jaguar/all-models/. A ten year old Nissan Micra costs seven times as much, so you will see that I was omitting...
If you can afford to buy the right sort of new car, you don't pay road tax. If, however, you can only afford a cheap old car because you don't earn very much, the tories will happily sting you for road tax; it's the opposite of a progressive tax system. They probably love it ..........