If you're talking about your tri, I'd say a PHRF of 90 is a gift rating for such a boat. Examples:
Carrera 290 102
Dash 34 96
Farr 38 84
Frers 33 102
Henderson 30 87
(these numbers from light air So Cal)
Unless you were doing nothing but beating in moderate breezes I'd expect your tri to sail circles around such boats over a typical RTB course.
In the PNW multis are rated, perhaps a bit harshly generally, but at much lower numbers.
As reference, a C&C 29 (older) rates around 190, an SC 50 around 25 or so with many larger newer sleds in the negative numbers. A C&C 37 also rates around 90. These numbers do vary regionally so others will differ.