Only in some engineer's pipe dream- - - -dyno readings, corrected for temperature, atmospheric pressure, and humidity, are the only figures worth considering. I'll be happy to provide those numbers, if and when I ever get my dyno back in operation.
There are far too many variables, such as fuel mixture, cam profile, exhaust system, carburetor, air cleaner, distributor advance curve, and about a dozen other considerations before something as basic as combustion chamber volume will make much difference.
Then there's Murphy's take on the whole thing- - - -"Constants aren't; variables won't!"
Jerry