As said above, in laymans terms, main ones are more displacement (longer stroke), as much air in the cylinder as possible(more boost) and squeezed into as small as space as possible for bigger bang and ignited late (high compression and advance).
Torque. Where do you want it. If you want it high in the rev range then smaller stroke. As longer stroke motors don’t like to rev as much as short stroke motors. F1 motors make torque high in the rev range due to high bore to stroke ratios. This then lets them make massive power. P=Tw
If you want it low in the rev range(better drivability) then long stroke motors would be better.
If you want a high powered car get it to make torque high in the rev range and power you will have.
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