Turbo vs Super. was variable comp...variable disp....

[Eric J. Klammer]

A Turbo charger is more efficient that a supercharger because it is able
to extract thermal energy from the exhaust.  While there is a parasitic
loss from the back pressure, that loss is somewhat offset by the
decreased temperature of the gasses exiting the turbo.  If a
turbo/engine combination were sized such that they were under full load
at cruise, it would have higher efficiency than a naturally aspirated
engine sized to be at full load under similar conditions.

Let the flames begin......:)

Eric