2.5 TD is a good car, but what about a 2.6 with LPG perhaps?
If you're considering a 2.6 in the 1st place then you are looking at a relatively new car, but you're concerned about running costs so be careful of the March 2001 deadline.
Cars registered after March 2001 will soon cost quite a bit more to tax for the road annually.
Not quite correct
Check here
http://www.direct.gov.uk/en/Motoring/OwningAVehicle/HowToTaxYourVehicle/DG_172916Since all Omegas are going to be registered before March 2006 they have been frozen in Band K despite their high emissions. Have a look a the link, and scroll down, this shows band K will increase to £245 in 2010, an increase of £30.
I would go for a V6, I have a 3.2 estate and love it. If you are DIY competent you can dramatically reduce your servicing costs.
I am thinking of going to LPG to further improve the running costs as I am estimating a 15,000 miles annual mileage.
I haven't owned a 2.0 or a 2.2 (four pot(cylinder) engines) but remember the Omega is a heavy car and these engine sizes may leave the car feeling underpowered.
At the end of the day, it is your personal choice and there will be those on here that will swear by the larger engines, or diesel and those that feel the 4 pot engines are more than adequate for their needs.
What are you intending to use the vehicle for, as that may assist those offering advice.
HTH

PS Must learn to type faster than Tunnie
