Not sure if I'm just being silly but I really don't understand the new road tax rules. I've just purchased a 2007 Chevrolet tacuma automatic car for £600. Ive just been to get it taxed and its over £500 for the year! This is a lot more than my 2liter diseal Mondeo and this one is a hybrid.......I just don't get it. Will it cost the same amount next year? can someone please explain....thanks