That little case certainly wasn't all that efficient at only 15 HHG. That would have been quite a good figure for the 70's to mid 80's... The 'R' was good for it's time but those are only average numbers today too. I think that most of Ford's Genesis engines would fall in about that range, and one of the most efficient tractors ever tested at Nebraska was the Ford 8870 which just about broke 20 HHG (19.98) I think was the number at rated power.... Personally I've never thought of Deeres to be particulairly efficient engines. I know they put up fancy numbers on the PTO test at nebraska at maximum power but when they get to the field in the real world they burn more fuel than most. I think it's in the numbers you've shown at part load. They get awful poor in that working range and most I've seen seem to find themselves beside the fuel tank a lot more than their competition. You don't by chance have the test handy for the 4440?
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
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