Hourse Power Rating for a 5.0 Mercruiser EFI

[SportCraftFisherman]

Can anyone tell me the H.P. rating for a 5.0 mercruiser fuel injected engine with an alpha one drive?

Also, my hull is a 25' sport fisherman hardtop, about 4500 lbs. What top speed (at max rpm) should I get on this engine with this hull?

This boat was downpowered from a 5.7 but I was told that the H.P. on an EFI motor should be just as much as the 5.7 but better on gas....

Thanks and regards