Re: Why Can't A Fuel injected Petrol Engine be as Efficient as a Diesel?


"Robert" <RB@..> wrote in message
news:gr1r81tn1r0e36qjjpc4gsc4ul32qsqa72@xxxxxxxxxx
> I was just wondering.
>
> What exactly is the difference?

Compression ratio. Higher=better for efficiency. Diesel engines use higher
compression ratios.

However, this is only part of the reason why a diesel fuelled vehicle may
appear to get better gas mileage. Diesel fuel also normally contains
somewhat more energy content that gasoline on a volume basis.

http://en.wikipedia.org/wiki/Diesel_fuel


.

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