300hp
Not sure what difference it makes to your figures but mine is a 300hp model not a 285hp model.
All Bo's from 1984 were I believe. Mine is a '93.
Mooneys are very nice but look very small compared to a Bonanza or even a TB20. I suspect that is where the extra speed for less power comes from. Very compact cabin around the pilot and very slippery.
I know Mooneys are very frugal.