In message , Dave Plowman
writes

The trouble is that it's never like for like. Powerful diesels - like
BMW ones - with say six cylinders, designed for refinement and power
rather than outright economy, tend to narrow the fuel consumption gap
considerably. You pays your money...

As you says

"you pays your money an you take
your choosy". Diesels compression ignition have the upper-hand over
electric ignition petrol ignition. I'f you don't know how, the I.P.
address is real. I don't have anything to hide.









--
Clive