prateekkaul

These days most bike have their power rateings in PS rather
than BHP. What is the diference between PS and BHP, and why
have most companies stopped stating their power ratings in
BHP? [?]

roadrage

Good ?...even i wanna know...n e TECH GURUS?

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mridulhunky

can any one tell us difference between bhp and ps

sk8er

"ps" is short for Pferdestaerke which is the term for a metric horsepower, defined as .7355kW, (75kg/s) as opposed to the old imperial brake horsepower (BHP) which is .7457 kW. "ps" is also known as Cheval Vapeur (CV). This means that 1 ps = .9863 bhp. The term "ps" is used in Japan, and also continental Europe. I think they invented it to be able to tell americans how much power they had with a metric equivalent.

"Brake horse power" (BHP) is power (in imperial units) calculated by measuring the torque of a loaded engine (the brake part) such as during a dyno run. It is often abbreviated to horse power or "hp"

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sk8er

more more.... (source http://members.tripod.com/~autoxtrem...autobytes3.htm )

First of all bhp and ps are slightly different animals. Bhp or brake horsepower is a calculation where the engine horsepower is measured with no load from a chassis or any accessories attached to the engine whatsoever. It’s also called gross horsepower. PS, on the other hand, is a measurement of net horsepower. It’s horsepower calculated with the engine installed in the vehicle, complete with accessories and ductwork. So you can’t really convert one measurement to the other with a simple formula.

However, just to give you a better idea on what "ps" stands for, we can talk a little more about horsepower. Just as there are different ways of measuring temperature, as in Centigrade or Fahrenheit, you can measure the power of your engine in several ways, too. Horsepower is simply your engine’s ability to move mass over a certain amount of time. If you want to be technical about it: one horsepower can lift 33,000 pounds up one foot in one minute. And that’s the measure of horsepower you’re familiar with, the one used in the U.S., and it’s the standard set by the Society of Automobile Engineers, which is why it’s also called SAE horsepower. The ps you’re asking about is short for the German word Pferdestarke, the term for metric horsepower, also known as DIN horsepower. DIN is short for Deutsche Industrie Normen which simply translates to "German industrial standard".

So, in summary, hp is the U.S. standard for horsepower, while ps is the standard in continental Europe. If you want to dazzle your friends, you can say that one horsepower is equal to 1.0139 ps, making SAE horsepower roughly 98.6% of the metric DIN measurement.

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rajazz

..the whole point noting sk8er's points is that the bike cos are using ps now cos it appears as if the bike has substantially more power than it would if stated in bhp!!!..u know, psychological manipulations at work to lure unsuspecting customers!!!

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Nazster

i think its easy to understand bhp then ps.

nSu

This topic was discussed previously too

aadix

i dont think it was discussed before
anywayz moderators please dont delete it

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pranay

it was- http://www.xbhp.com/forum/topic.bike?TOPIC_ID=2037

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