The high tax bracket for the Roadster may have something to do with it. I also think that a V6 high power Morgan is always going to have a more limited appeal - there are those (like myself) that are addicted to the power and torque, but you do sacrifice the traditional Morgan nimbleness of the Plus 4 and 4/4, which is a disadvantage for many. I have never regretted my 3.7 (I have had two of them) and would never part with it.
Perhaps the absolute sweet spot for Morgan was a car they produced in limited numbers around 2011/12. If I recall correctly, it was a Plus 4 engined car and designated a Plus 4, but it had the narrower 4/4 body.
Good news is that you will only be paying £195 road tax next year David, having served your penance for having an "expensive car".
