I'll try again.
I'll agree, displacement, ON ITS OWN, doesn't guarantee power. Look at the 1760 cu in four banger that makes 290 hp. But if you FEED the displacement increase, power increases. Rpm has limits as to what displacement it can overcome, and what gearing is required to overcome the bigger motor can become onerous.
If I have a 6500 rpm 632, that makes 900 hp n/a, with a 3.55 gear, how much rpm and gear ratio will your 273 need to have to beat me?