Re: What was the very worst gas hog, among bigtractors?

Posted by RAB on February 10, 2002 at 13:38:24 from (195.93.49.153):

In Reply to: What was the very worst gas hog, among bigtractors? posted by JD70Jim on February 09, 2002 at 16:36:51:

Why pick on the big gas tractors? Thermodynamics predicts higher efficiency as compression ratio increases, so all diesel tractors (comp ratios of 15-20:1) will use less fuel than the equivalent gas model. If all things were equal no-one would buy a gas tractor, but they aren't. You all know gas tractors are cheaper to buy, easier to repair (the engine), don't need such heavy duty battery or starter motor, are easier to start in very cold conditions (fuel doesn't wax) etc. It's just that it's more noticeable on the big boys which are expected to carry out heavy work. In Britain where gas has been taxed heavily for many a year, its not just how much extra (in volume)it would need, but how much the extra fuel costs would be for a 'hobby farmer' - would have been four, probably five times as expensive for fuel to run a gas than a diesel!!

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