Sorry not had a chance to read up any of it yet but are we saying that it's £450 for any of the V6's? In which case I may as well stick with the 3.2 as going to a 2.5 would make absolutely no difference at all? :-/
From April 2009 there will be a new set of tables ... and basically any car registered after 1 Mar 2001 will be taked according to CO2 emissions, as printed in your registration document. I believe that most V6 Omega's are above 225 ppm/CO2 so will be taxed, from that date, at over £400 per year.
This is my interpretation of the data
I've tried to copy the table a couple of times but it ends up as gibberish

sod it ... done a screen shot instead ...

At present we are column 2 and limited by the notes .. from 2009 we are column 5 ..

If you are pre March 2001 you get away with it !!
Perhaps I shouldn't have changed me car last month ...
