On 15 Feb 2006 22:41:57 -0800, "Robert M. Gary"
wrote:

Montblack,
The reason its called a 231 is because it is suppose to cruise at
231mph (I believe that is wide open throttle though).
-Robert Mooney owner

The late model Mooneys (201, 231, 252) are definitely named by their
top speed in mph.

Here is a link to the performance section of the 231 POH.
http://lists.aviating.com/mooney/per...erAltitude.pdf

It appears that 231mph is achievable at approx 40" & 2700RPM, which
the turbo'd engine can achieve at 16k through 20k pressure altitude.

I doubt anyone would be willing to run the engine that hard as it is
very close to 100% power.

75% @ 20k ~= 220mph
75% @ 24k ~= 229mph