Here you go, Piston area and force.
This is at the edge of my understanding of this so I'm not saying I'm a 100% right but to me the more fuel and air is in relation to the displacement difference, so at say a 100% ve and 10:1 cr a 25 cid cylinder vs a 50 cid cylinder the 50 cid should have about twice the fuel and air but has twice the compressed volume and expands to twice the total volume which I'm guessing theoretically should create similar psi.When it comes to displacement, no.
Gotta disagree. Bigger pistons and longer strokes draw in more air (and fuel). Changing bore/displacement changes compression ratios in a given engine, and that's widely known.
Compression ratio is a determination of potential pressures, all else being equal. Increasing, for example, the bore, increases the amount of air/fuel drawn in, by the swept volume. This is in greater proportion to the combustion chamber volume (which also increases, but not as much).
So, increasing displacement does increase combustion pressures, all else being equal.
