I do and don't, I think people over simplify by using torque is king and no replacement for displacement mantras.
And don't put too much value in rpm and gearing also, rpm got equal billing in the Hp formula for a reason torque x rpm / 5252 = hp.
Sometimes this train of thought of "torque is king and no replacement for displacement" leads to bad and or faulty decisions.
I go by the theory that the bore is the ultimate limit of NA power if taken out to the limits, eg. 4.04" bore 340 vs 410 at say piston speed of 5000 fpm so 9063 rpm vs 7500 rpm if both engine are built to take full advantage of the bore size and rpm they should come up with similar hp peaks and curves and the 340 should have a slight advantage cause of friction and better rod ratios. Now in everyday average build I could see the 410 coming out on top most of the time but I don't think it's safe to assume it's an always the case people make it out as, all the builds I've read and watch they use pretty similar parts for similar output no matter what engine make or size.
