[Fiction question] Power boat? speedboat? what's the getaway craft?

I thought I’d done pretty well by finding a 21’ Stingray 225 all by myself:

2009 top picks for the year
Stingray performance

But the people who write about these things assume that the reader already knows what they’re talking about. I can’t find out if this thing is called a power boat or a speedboat or something else, or if those two things are the same or different, or if this is even what my character (the yacht owner—this guy ) would use for his last-ditch getaway attempt.

So—my questions:
— Is the Stingray I picked out the kind of fast boat that my yacht owner might keep on hand? He wants it to be a good tradeoff between speed and sufficient fuel storage and space for supplies for a longish trip without having to fall back to land.
— What generic term do you use to refer to this type of boat?
— If I’ve got it wrong, what’s the right answer?

Almost to the end, guys. Thanks for all the help.