I only said Fiesta Diesel as they are plentiful and cheap.

Yes exactly on the LPG conversion, I have seen several Jensen owners go down this route and they end up spending £2k + for the conversion and then find they cant buy it locally as either they have run out or there is no local station. You also loose boot space and in a lot of cases cars don't run as well.

As I have said before on this forum is you have to factor in almost Zero depreciation, normally this is the biggest cost on a used car but as long as you keep a 260 in good condition and don't do 20k miles a year the chances are you can run one of these for several years and probably sell it for what you paid for it as long as you have paid the market price.