Quote:
Originally Posted by dcb
diesels are also throttle-free, and have high compression ratios, and direct injection these days, those help too.
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Agreed dcb, those are incremental improvements but the energy content difference is the largest factor, in my opinion.
The kwh value of a gallon if diesel is considerably higher than gasoline using the same method of measurement.
I worked for Mercedes when they went from throttled to throttle less in 1982. They calculated it resulted in a 7% improvement in mileage. Those were prechamber engines, but were otherwise identical. They had to add a vacuum pump to the throttle less engines to run the climate control and door locks.
regards
Mech