1HP is actually ~5 horses. There was a test trying to measure it.

https://youtu.be/7qxTKtlvaVE

Other way around, a horse does more like 5-15hp

Yes, you’re right. My mind is foggy apparently.

Thanks a lot. Unfortunately I can’t edit it anymore.

One horse power is the rate a horse can sustain while working hard all day long.

They don't make them like they used to