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British Horse Power is the answer. Read the explanation below. The most popular unit of Power is the ‘Horse Power’, which from ancient times was the rate of work an ‘average horse’ could do. In scientific parlance today, it translates into 4,500 kg-m/min or 33,000 ft-pounds/min. In Metric System of Measurement, therefore, one ‘horsepower’ = 746 Watts. In post-war Germany, ‘PS’ was and is still used – which was/is a functional equivalent of the ‘British’ Horse Power. In reality, it equates as 1.0 HP = 1.07 PS. Today, it seems the Car/Advertisers use ‘PS’ atleast in India to mislead the gullible public - as the same HP/BHP ‘sounds’ a little higher when expressed in PS!
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