How much horsepower does one horse have?

Answer 1

Depends on the race (as weather/climate and altitude both influence power output) and the upgrades.

The average quoted figures are 750 hp for the starting of the season, and 800-850 as the engined get developed throughout the season. KERS also adds ~80 extra HP.

Then FIA comes with new rules to reduce power output and this cycle continues.

Answer 2

14.9 horsepower for a few seconds at peak, or maximum power. Wikipedia says so. :)

Answer 3

it usually has about 700 horse power

Answer 4

123