Horsepower (power)

Horsepower is the most common number given for the power (or rate at which work is done) of a vehicle in the automotive industry. The term comes from the original comparison between early steam engines and the horses that they would replace. The purpose of the number is to be able to quantitatively compare the ability of an engine to do work. While the term horsepower is widely used, the exact unit of measurement can differ by region or method.

HP - This number is often one of the following, but sometimes is the indicated horsepower. Indicated horsepower is calculated based on the engine pressure and the displacement of the engine. This is used especially on very large commercial and industrial engines.

BHP - 'Brake horsepower' is the amount of power available at the crankshaft of a vehicle, before it has lost any power in the friction or heat through the gearbox and other components. In the US before 1972, the engine could be tested with some the accessories removed and ta higher performance exhaust manifold. After 1972, new regulation required the engine to be closer to the exact consumer version, thus bringing down horsepower ratings a little, but providing more accurate numbers.

PS - Also known as ch, cv, hk, ks, and pk, is the symbol for the metric horsepower. But, this unit was replaced by the Kilowatt (KW) in 1972 as the official unit of measure for Europe.

KW - The kilowatt is probably the most accurate measurement of horsepower. 746 watts = 1 horsepower.

Rankings

Vehicle Name Horsepower (power) (HP)
1 2017 Bugatti Chiron 1500
2 2016 Koenigsegg Regera 1500
3 2014 Koenigsegg One:1 1360
4 2006 SSC Ultimate Aero 1287
5 2013 Hennessey Venom GT 1244
6 2010 Bugatti Veyron Super Sport 1200
7 2011 Koenigsegg Agera R 1140
8 2009 Zenvo ST1 1104
9 2015 Ferrari FXX K 1036
10 2006 Bugatti Veyron 1001