I assume you are looking for the rated horsepower, and not the actual horsepower of your particular individual engine? I believe the sales literature gave the rated horsepower, and a google search should bring up magazine or net reviews that would quote the rated HP and other specs. e.g., Edmunds, Car and Driver, Consurmers Reports, etc.
Oh, you are really "fanatics!" 
I got fast answers!
Sorry if I was not clear. I was refering to the hp from factory. I have this question, because when I was searching for the car, I found at cars.com that there are 3 focus models, all of them with a 2.0l engine and from ~ 110 to 150 or 170 hp, I don't remember. I don't have the manual. 
The chips can help, the programmers are better ( same idea, just one is more adaptable.. I would do the bolt-ons first if you plan on it, you will see more reward there, and then do a tune when all the other stuff is finished ( unless its an automatic, then do a flash as it really helps the shift points )