Drivers would take the biggest hit under Liberal Democrat plans to lift road tax by as much as 1,000% for the most polluting vehicles.
Cars, emitting less than 120gms or less of carbon dioxide per km, such as hybrids and the 700cc Smart car, would pay no road tax.
But cars emitting 166 to 185g/km - including the three-door Mini Cooper and Ford Focus Ghia and Mondeo - would pay £850 a year in tax (£700 up), and those emitting 186 to 225g/km, which covers Land Rovers and the Toyota Rav 4, would pay £1,500 - up from £190. Gas-guzzling four-wheel drives and vehicles with emissions above 226g/km - which hits the Honda Accord as well as Jaguars and Porsches - would pay £2,000 a year, up from £210.
Air travel would also be heavily taxed to pay for the Lib Dems' plan to cut income tax by 2%, change tax thresholds and replace council tax with a local income tax.
They say, a pensioner couple would gain almost £2,000 a year, a family earning £25,000 would save £1,514, but a city banker on £250,000 would pay almost £10,000 extra.