Respectfully, you will notice I said "...of the same horsepower..." If th engine"s design point is at 5000 ft altitude, you can size the displacement for that design point and it will have a bunch more power at sea level.
But sure the altitude lapse rate for a turbo sized at sea level, in general, is less than that of an NA engine sized at sea level. In fact if the compressor outlet pressure is held constant by a control system, there is no altitude lapse.
The turbo makes some things easier for the manufacturer but the owner has to pay for the operating and maintenance costs and my point is the more moving parts, the more that can go wrong and it will happen on the owners nickle.
And I was refering to tractor applications not trucks. With trucks, power to weight is an important factor.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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