My question is torque...while largely a function of air velocity, its also related to displacement. Ask any Honda guy about it. They have 1.8/2.0L engines that make 200hp or more, which is equal to many 1990s vintage v8's, trying to move something like chevy van with the 140ish ft/lb of torque they make is another matter.

my point...lets say this new wonder engine makes 500hp out of 1.5L...if it only makes say 200 ft/lb of torque your not moving a 40,000lb bus with it.

In some applications there is no replacement for displacement.