Pls do not misunderstand.
As I see now a Phantom 23 is fast as it runs 77 mph with 260 HP. I have been in contact with a Phantom 25 owner in UK running 2 x Merc 2.5 SS, and his top speed is in the upper 90 ties. And a Phantom 23 with twins in excess of 100 mph is awesome!
My main objective was to clarify how much faster a Phantom 23 is compared to a Phantom 25.
A Phantom 23 with a single PM 300 SVS should run 80 mph +.