VolvoWorld says that my '66 B18B should be cranking out 115 ponies. But, is this SAE or net horsepower, and what is the diff.? In other words, I guess what I am asking is if this 115hp rating is equivalent to a "modern" engine rated at 115hp, or if the "true horsepower" is actually less?

Thanks.

-=Bob=-

From what I have heard SAE is gross and BHP or DIN is net horsepower. Net is the horsepower figures after the losses incurred from the various accessories on the engine (A/C, Alternator, etc.) SAE is before that loss. I think the difference is only a few percent between the two. So 115 HP SAE might be about 105 net or so. Of course a couple hundred thousand miles can take a bit off of that number also.