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I'm sure I'll go doh! when someone tells me.
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I can't remember the actual word but it is the German for Horse Power(Pferde*****) as is CV in French(Chevau Vapeur).
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PS
This unit (German: Pferdestärke = horse strength) is no longer a lawful unit, but is still commonly used in Europe, South America and Japan, especially by the automotive and motorcycle industry. It was adopted throughout continental Europe with designations equivalent to the English "horse power", but mathematically different from the British unit. It is defined by the Physikalisch-Technische Bundesanstalt (PTB)[1] in Braunschweig as exactly:
1 PS = 0.9863201652997627 hp (SAE)
The PS was adopted by the Deutsches Institut für Normung (DIN) and then by the automotive industry throughout most of Europe, and is always measured at the wheels, as opposed to most factory horsepower figures, which are rated at the crank
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TourVanMan TM < Ex RF >
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The PS figures quoted by the TUV and KBA in Germany are Flywheel figures;I have watched them being recorded.
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In other words: real grunt!
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SAE figures are an American spec and are recorded with no ancillaries on the engine so are invariably more than the engine records as used in the vehicle.European engines are tested to an EU specification which will have waterpump,battery charging etc.The Din spec uses the same recorded figures but the correction figures for atmospheric conditions vary slghtly.Figures recorded on a rolling road are not legal and are of doubtful use as the figures for transmission loss and tyre rolling resistance can vary even during the same test.
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I should add that now the power in Europe will be quoted in Kilowatt(KW)>
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I should add that now the power in Europe will be quoted in Kilowatt(KW)>
kW not KW ;-)
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L\'escargot.
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"figures recorded on a rolling road are not legal and are of doubtful use" As in the optimistic torque and power numbers for chipped and remapped engines?
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Most certainly;when I worked in the motor industry,we calibrated our engine dynos once a week.When we carried out an official test,in the presence of the TUV,VCA,TNO,INTA or UTAC or any of the other authorities,we would calibrate the dyno in their presence immediately before the test.A test on a rolling road should only be used for a comparison(before and after)to show a difference and even then due to differences in tyre deflection and suspension with changes in power and load may still not be directly comparable and should not be taken as an actual figure.Even tests on engine dynos should be treated with suspicion unless the dyno is properly calibrated.
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That certainly used to be the case in the US, but in 1971 the US manufacturers were forced to start quoting SAE (net) figures, taken with water pumps, exhausts, air cleaners etc etc.
The SAE net figure was usually 20 - 25% less than the old SAE gross BHP rating.
Hence the myth that later models of American-engined cars like the Jensen Interceptor were less powerful in the 70s than the 60s. Not so: they were just quoting Chrysler's new official SAE net BHP figures.
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How do kWs compare with BHPs?
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See page 24 of tinyurl.com/yzdxhf
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L\'escargot.
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1 PS = 0.9863201652997627 hp (SAE)
A case of the English horse being harder working than the German ?
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