The critical date for us is 1 March 2001. Cars registered before that date are taxed simply on engine size. From April the rates will be:
Up to 1549cc £125, over 1549cc £205.
But they ARE introducing a sliding scale of additional charges depending on emissions for cars registed after 1.3.01. If you are interested and have the patience its all here:
http://www.direct.gov.uk/en/Motoring...icle/DG_172916
And if like me, your car wasnt built with a cat, you dont have to pass the full emissions test either. They only check CO (max 3.5%) and HC (1200ppm). Mine flies through the test. Another good reason to keep it going