That's the other benefit of buying a pre-2000 car - only two tax brackets, under 1500cc and over! Current price is ~£230 i believe and that is for anything from 1501cc to however big you can squeeze under the bonnet! After 2000, you go into those weird tax bands for various different engines, fuels and so on.
If you're considering a Subaru Sportwagon, add a Nissan Stagea to your list too!
THey can be found in 2.5 GTS form without the twin turbos so keeping your fuel and insurance down a bit!