Ok, then.......... I'll hazard a guess.....
Gross output 127 HP:
This was the old gross rating
https://en.wikipedia.org/wiki/Horsepowe ... ross_power
SAE gross power
Prior to the 1972 model year, American automakers rated and advertised their engines in brake horsepower, bhp, which was a version of brake horsepower called SAE gross horsepower because it was measured according to SAE standards (J245 and J1995) that call for a stock test engine without accessories (such as dynamo/alternator, radiator fan, water pump),[32] and sometimes fitted with long tube test headers in lieu of the OEM exhaust manifolds. The atmospheric correction standards for barometric pressure, humidity and temperature for testing were relatively idealistic.
As installed 104.5:
This was the old net rating
https://en.wikipedia.org/wiki/Horsepower#SAE_net_power
SAE net power
In the United States, the term bhp fell into disuse in 1971–1972, as automakers began to quote power in terms of SAE net horsepower in accord with SAE standard J1349. Like SAE gross and other brake horsepower protocols, SAE Net hp is measured at the engine's crankshaft, and so does not account for transmission losses. However, the SAE net power testing protocol calls for standard production-type belt-driven accessories, air cleaner, emission controls, exhaust system, and other power-consuming accessories. This produces ratings in closer alignment with the power produced by the engine as it is actually configured and sold.
Maximum output (just shy of detonation) 115.9
Net, but the AF ratios and timing curve were tweaked to give best results possible, not as spec'd/delivered.
Finally the 145 HP and 215 TQ were what was theoretically developed internally by the engine..... i.e. turn the engine over and see what the frictionally loss is at various rpms and ADD that to gross figures.
_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
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