In article , Ernie
Willson wrote in part:

It is true that turbocharging will increase efficiency and power output.
It is absolutely not true that anything that increases output per cubic
inch will increase efficiency. Supercharging is an example. It always
increases output and decreases efficiency.

How are the above all true if turbocharging is, as explained well by
Nate, a kind of supercharging?

- Don Klipstein )