[header] How to calculate horsepower [title] Get your car's torque numbers. [step] Look under the " technical specs " section, or look for " torque " in the index of the owner's manual, and it will give you the torque value. If you do not have the owner's manual, try using a search engine to find your car's torque.
For instance, search " torque " and your car's make, year, and model, and a helpful result should come up. [title] Find your car's engine speed.