OP, this question gets asked time and time again. The real answer is "Who cares?" How fast is your vehicle? What does it do in the quarter? Is there a HP level you must have to do a certain chore around the house?
If you really want to know how much power it makes, dyno it! Race it! Other than that, you're just guessing at a number to throw around at the next bench racing session at the local drive-in.