Now you're using de-tuned farm engines to prove your point. But once again, you
screw it up! On the same page they list others that are over 18 hp/gal-hour,
and that's detuned to run at 1500 rpm, and using US gallons. Those numbers
listed as "Specific Fuel Consumption" is in "grams per HP-hour"; you have to be
capable of a bit of math to properly convert to hp-hours/gallon.

"JAXAshby" wrote in message
...
old fart, here is the Lister engine under brand new engine, and laboratory
conditions claiming about 19 hp/gallon/hour (that's Imperial gallons, btw)

http://www.lovson.com/engineering.html