Hugo Nebula wrote:

IME diesels give about 40% better MPG than petrol, and with diesel
currently about 12p/litre more than petrol, it's still less on fuel
costs. However, there are other costs to consider such as the initial
purchase price and any additional servicing. The higher your annual
mileage the less these are a factor.

In mine, I can fill the cabin with a load of junk or bodies (living I
should add) and still cruise motorways building speed and overtaking
without shifting down gears and taking huge gulps of fuel from the tank.
Doing that in the previous petrol car with near the same engine size
(2 litre) and laden similary, the acceleration ability in gear is not as
good.

However, if I were a driver in London (or any of the big cities) running
around unladen and wanted a smaller lighter car, the entertainment
choice would be petrol - and I'd trash the gearbox, run the traffic
lights, flatten someone elses dog, advance 0-60 years in 10 seconds and
be in the grave soon after the 11'th.

--
Adrian C