yeah honda moved the s2k to a 2.2L for america since americans kepted complaining about the lack of torque. In europe they kepted a 2.0L. Hp/Liter isn't really a good way of measuring a cars performance anyways.

You'll noticed that the sports cars listed above have higher hp numbers per liter because of more rev's at the expense of torque and the muscle cars listed about have more torque at the expense of revs with lower hp numbers.

Just depends on what you want, on the track you want more rev's, at the drag you want more torque since your only going 1/4mil.

The best engines usually have a balance of both.