There are TWO replacements for displacement - FORCED INDUCTION and WEIGHT REDUCTION
I know, FI it isn't the same thing, but it does work and weight reduction works in every case - power to weight ratio is everything. Cars can be quick without having huge displacement. Displacement is still a good thing though
I drive modified Japanese cars but
hate riced poser morons too. I love to pick on those guys.
My R was stupid quick for a 4cyl car - the main reason: light weight. I raced a guy in a Mustang GT. I had him off the line because I got the hole shot, but he pulled ahead by 3rd gear as expected - I was right on his butt though, less than a car length up to about 110. We get to the next light and he is making hand signals to the effect of "Yeah, I'm cool..." The sad thing though is that I
kept up with him; I couldn't gain on him, but he couldn't pull away from me, with half the cylinders and less than half the displacement, and he was happy about that??