What is the difference between horsepower and brake horsepower

The horsepower unit used for rating electric motors is equal to watts. The horsepower unit used for rating steam boilers is known as the Boiler Horsepower and it is equivalent to equivalent to The metric horsepower defined as 75 kgf-m per second, which is approximately the same as In the general sense, the horsepower is the amount of energy passed as the usable work output from an engine.

An engine loses its generated power due to friction and other factors in gearbox, differential, alternator, water pump, and other components such as muffled exhaust system, power steering pump.

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Again, as a rule of thumb, the higher the horsepower, the quicker a car will gain speed. Horsepower is actually a made-up measurement. Steam engine pioneer James Watt wanted to compare the effectiveness of his engines against the horse that previously did their work. Watt defined one horsepower as the equivalent of the energy expended by a single horse lifting 33, pounds one foot in the air from the surface of the Earth in one minute.

Not an easy thing to imagine. To further complicate matters, European and Japanese car manufacturers use a metric measurement of horsepower. One metric horsepower is slightly more than one brake-horsepower. Why the difference? Well, on the part of the car magazines, old habits die hard.

There was a time when the kilowatt was the preferred measure. The higher the number of kilowatts the more powerful the batteries. You might be wondering where torque comes into all this. In simple terms, torque is a different measurement of the work an engine can do, taken from a different part of the engine.