lawnmowers? damn..
F1 race cars all have 1.6 liter turbocharged hybrid V6 internal combustion engines (ICEs). The engines produce 830 to 850 horsepower. Two energy generators, one that recaptures energy from heat and the other from movement (kinetic energy), produce an additional 160 horsepower stored in a battery for use in short boosts.
The additional electrical power source lasts only a short time, up to 33 seconds per lap at full boost power, but the heat and kinetic capture motors regenerate the energy rapidly. Therefore, a second answer to the total horsepower question is 850 horsepower most of the time, with as much as 1,000 horsepower for 33 seconds per lap.