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Engine power is the power that an engine can put out. It can be expressed in power units, most commonly kilowatt, pferdestärke (metric horsepower), or horsepower.In terms of internal combustion engines, the engine power usually describes the rated power, which is a power output that the engine can maintain over a long period of time according to a certain testing method, for example ISO 1585.
735 kW (986 hp; 1,000 PS) Plug-in hybrid: Up to 2000 units per year planned. [43] [44] Denza Z9/Z9 GT BEV 2024 710 kW (952 hp; 965 PS) Electric: LaFerrari: 2013 708 kW (949 hp; 963 PS) Hybrid electric: 710+ units produced. [45] Koenigsegg Agera: 2010 706 kW (947 hp; 960 PS) Internal combustion: 7 units produced McLaren P1: 2013 674 kW (903 hp ...
The Jamaican sprinter Usain Bolt produced a maximum of 3.5 hp (2.6 kW) 0.89 seconds into his 9.58 second 100-metre (109.4 yd) sprint world record in 2009. [14] [failed verification] In 2023 a group of engineers modified a dynamometer to be able to measure how much power a horse can produce. This horse was measured to 5.7 hp (4.3 kW). [15]
Diesel engine (naturally aspirated) – 33.4 kW (45.4 PS; 44.8 hp) per litre – 1993 Mercedes E 300 diesel 100 kW (136 PS; 134 hp) DIN 2.996 L OM606 I6 Diesel engine ( forced-induction ) – 100 kW (136.0 PS; 134.1 hp) per litre – 2020 BMW Alpina D5 S 3.0 L I6 triturbo 300 kW (408 PS; 402 hp) [ 30 ]
However, it is the power a car can produce at the wheels (wheel horsepower or whp) that matters when it comes to acceleration performance. Wheel horsepower equals brake horsepower minus drivetrain losses, which can be anywhere from about 10% to 25%. [12] Power-to-weight ratio: hp/lb hp/lb W/kg acceleration higher is better Propulsive efficiency
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.
Brake-specific fuel consumption (BSFC) is a measure of the fuel efficiency of any prime mover that burns fuel and produces rotational, or shaft power. It is typically used for comparing the efficiency of internal combustion engines with a shaft output.
The limits between the horsepower denominations were drawn at either 0.49, 0.50, or 0.51 in different cantons. Thus, the eight horsepower category would cover cars of about 7.5–8.5 CV. In 1973 Berne switched to a taxation system based on vehicle weight, and a few other cantons followed.