But don’t feel bad! Engineers don’t even agree, you see big ships with huge slow rpm displacement, big bore/big stroke engines and ones with relatively small high speed turbines. Small bore/small stroke??:)
That's not disagreement, that's design for application.
People tend to forget that no engine is designed for any ONE thing - packaging and manufacturing still dictate a bunch of it. Hell, even in racing the OEMs basically set the standard even if only tangentially, and then competitors have to work around the constraints.