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Had an ineresting discussion with my new boss today, he asked me to try describe to him the difference between "TORQUE" and "POWER" in an automotive way.
Over to you guys..... bring me the fools guide to BHP and Newton meter.
Where is James.... the mad professor ?
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stinkwheel
Posted a lot
Doctor Of Gonzo Journalism - One of gods own proptypes, never even considered for mass production.
Posts: 2,280
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power makes you go fast but you need revs whereas torque rips yours arms off without the need for fuss.
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1973 Citroen Dyane 6 1980 Citroen Acadiane
1992 Citroen AX 1990 Citroen BX
1997 Citroen XM 1993 Citroen BX
1997 Citroen Xantia 1977 Citroen Ami 8
1996 Ford Escort 1989 Citroen BX
1997 Suzuki RF900 1988 Yamaha TDR250
1979 Honda CB400.
'I need less vehicles'
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I think Martin Brundell said the following during an F1 commentary once (and I think he was quoting someone else)
Comparing cars and boxers....
Power is how fast you punch, torque is how hard you punch
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Good examples  , Nutty professor is away starting new job and internetless i think. |
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 it doesn't matter if it's a Morris Marina or a Toyota Celica - it's what you do with it that counts  |
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well in its simplest terms isnt BHP what makes you go fast and Torque is what makes you accelerate...
there are thousands of anologies though
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B-8-D
Posted a lot
down to one car!!
Posts: 4,038
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power is torque X speed....
si
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TORQUE vs POWER ?rustingdeathtrap
@GUEST
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Torque and power are essentialy the same thing. A rolling road measures the tourque an engines produces and then calculates the bhp. 1bhp= 33000ftlbs of tourque per minute.
Engines produce maximum tourque a lot lower in the rev range than maximum bhp, this is because even though the engine isnt producing as much power per cycle, its running at a higher rate of cycles per minute.
Thats why bike engines prduce huge amounts of power 13000 rpm yet wouldnt pull a medium sized car up a hill.
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TORQUE vs POWER ?arthurbrown
@GUEST
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power... that my bmw pins you to the seat above 3500rpm, and keeps you there till the red line.
torque... our focus can pull away in second gear with a half ton trailer on the back.
That's the way I've always understood it.
Torque is the ability to overcome a force resisting the effect of power, no?
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power... that my bmw pins you to the seat above 3500rpm, and keeps you there till the red line. torque... our focus can pull away in second gear with a half ton trailer on the back. That's the way I've always understood it. Torque is the ability to overcome a force resisting the effect of power, no? my bm does both  i vaguely confused then again iirc its 192 lb/ft and 197bhp |
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Whats the difference between BHP and HP???....... Loosely connected with the topic..
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1987 Maestro 1.6 HL perkins diesel conversion 1986 Audi 100 Avant 1800cc on LPG 1979 Allegro Series 2 special 4 door 1500cc with vynil roof. IN BITS. HERITAGE ISSUES.  |
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Whats the difference between BHP and HP???....... Loosely connected with the topic.. The way I remember it.... Brake horse power (not Break as in broken) is applied power and it used to be compared to the work (labour, or pulling power) one horse could do when moving a specified object over a specified distance. Whereas horsepower itself is not the applied power, just the power of the horse itself, obviously all these numbers incresaed exponentially as internal combustion engines became ever increasingly more efficient and modifiers like the pioneers demanded more horsepower to increase all sorts of records...... Confused  ? Yep, so am I now. ............ JAMES !!!!!!! |
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Power = torque x rpm.
I was taught to imagine I was on a bike. Torque is how hard you push the pedals, power is how hard and how quickly you turn the pedals. So, a diesel is like putting a weightlifter on a bike - he can push the pedals hard, just not turn them very quickly. A Honda VTEC is like putting a marathon runner on one - they can't push hard but when they get up to speed they can turn the pedals really quickly.
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Last Edit: Mar 7, 2007 8:16:42 GMT by angle
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One day someone is goig to come up with a really good, simple and accurate description and I'll steal it and pass it off as my own.
You need both.
You can make torque without making power. For example those huge plant crawlers, they make something like 800 lbs torque @ 1200 RPM on a 1500 RPM redline but thats like 50 BHP.
In drag racing torque gets you off the line, power gets you a top speed.
"Torque is all about 1st and 2nd gear"
"Power wins arguments torque wins races" (based on the assumptin you are talking drag racing and that most drag races are won or lost in the first 60 feet...
BHP and HP are the same thing. HP used to be an RAC formulated calculation nased on bore and stroke which resulted in the tax class of your car. For example the Austin 7 is 7 HP but it was like 20 BHP. This system was scrapped in 1948 and replaced by unified road fund licence (VED) and since then HP is just an abbreviation of BHP.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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I've got 6mins 30 seconds
Power dosent exist, torque does
Torque is the amount of effort that the piston exerts on the crank shaft and this is directly translated to the wheels.
Each bang creates torque, the more bangs in a specified time then the more energy is transmitted to the wheels, and so the power increases.
So power is the torque applied over a time span, torque it's self is a timeless figure.
ummmmm
bang---bang---bang---bang
VS
bangbangbangbangbang
The second will give more go even though each bang is identical.
Any help?
J
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BHP and HP are the same thing. HP used to be an RAC formulated calculation nased on bore and stroke which resulted in the tax class of your car. For example the Austin 7 is 7 HP but it was like 20 BHP. This system was scrapped in 1948 and replaced by unified road fund licence (VED) and since then HP is just an abbreviation of BHP. Even though I'm old and daft, I'm not old enough to remember "Ford's New 7hp Car!" but hp is the horsepower rating which is calculated from the engine dimensions. I think the old RAC rating favoured long stroke engines for tax reasons so most British cars had low revving long stroke engines up to the ones designed in the 1960s. BHP is Brake Horsepower, horsepower that's worked out on the brake or dyno as we're all familiar with now. This depends on the BMEP of the engine - how it performs dynamically, how efficient the combustion is etc rather than just bore and stroke dimensions. I think ;D |
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MWF
Posted a lot
Posts: 2,945
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More of both is better!
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LOL @ MWF, he is a messiah |
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I always use this as an analogy.
When hammering a 6" nail into a wall imagine the speed your hitting the nail is the BHP and the size of the hammer is the torque.
Either hitting it fast OR hitting it with a mahoosive hammer will get the nail into the wall, as will any combination of size/speed.
damn site easier to hit it once with a sledge hammer than it is to hit it really quick lots of times with a ball pein hammer though.
BHP will do the job but requires speed as well without the torque to back it up.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Shortcut
Posted a lot
I won't be there when you cross the road, so always use the Green Cross Code.
Posts: 3,037
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Power (BHP) is an imaginary figure that you think up in your head down the pub prior to adding 50 to before telling your mates that's what your 1100cc Nova puts out.
Torque is a random figure that you invent that has no meaning as neither you nor your mates have every managed to work out what the hell it actually is!
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This space available to rent. Reach literally dozens of people. Cheap rates!
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, Nutty professor is away starting new job and internetless i think.
i vaguely confused
? Yep, so am I now.
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