Smaller, or slower. So many cars are out there running engines that are far too big, capacity that they never actually use. North American drivers seem to want cars that glide away from a stop or pass another vehicle without making a fuss, resulting in overcapacity engines. If we allow engines to actually rev to their potential, we can all do with much smaller overall designs.

I dunno. If you look at modern supercars, they are loaded with luxury stuff, and their mass is noticeably higher than supercars of old when that shouldn't be the case.

I suspect the "race edition" stripped version of many cars are still hauling around the fundamental design features they need to accommodate luxury features.