A "twincharger" (super+turbo) is notable for different reasons than you suggest. A turbo can hit stupid peak power numbers all by itself. The addition of the s

A "twincharger" (super+turbo) is notable for different reasons than you suggest. A turbo can hit stupid peak power numbers all by itself. The addition of the supercharger to the turbo dramatically improves low RPM power and often peak torque as well. In doing so, it also makes a larger turbo more practical as it reduces the problem of "turbo lag" (wherein a large turbo paired with a small engine doesn't engage until very high RPM) Race engines, of course, often aren't quite as worried about turbo lag because many cars spend their entire time at peak power.