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 Car Torque or horsepower?Which 1 is more important, For acceleration?

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WhitE LighteR
post Dec 7 2009, 10:37 AM

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swt.. shouldnt this be in FnF?
WhitE LighteR
post Dec 7 2009, 10:45 AM

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QUOTE(seantang @ Dec 7 2009, 10:40 AM)
I think you've got it reversed. Lorry engines typically have lots of torque to move big loads from a standstill but relatively low horsepower as it doesn't need to sustain high speeds.
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yup correct..

torque = better acceleration
bhp = higher speed
WhitE LighteR
post Dec 7 2009, 12:26 PM

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QUOTE(nujo87 @ Dec 7 2009, 11:17 AM)
So i got 1 of my answer tats is torque is for acceleration,n horsepower for topspeed.
Since my driving style is more depend on acceleration(mostly city driving)torque is more important for me i think smile.gif
Another look like very simple but yet quite technical question i would like to ask notworthy.gif
for old mitsu engine(4g18,4g13,4g15)their peak torque come at earlier RPM(2500-4500)

N campro engine(non cps)their peak torque come at later RPM(4000-6000)

Which 1 is more suitable for city driving/city short boost?

N since old mitsu engine can achieve torque peak at low RPM,will it be more FC?becoz no need to REV so high?
So old mitsu engine=Good FC n good boost power at <110km/h driving?
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the mitsu 4g18 engine are better for city driving. this is known for a very long time d. the campro are meant to be driven in a more sporty way. its just the way it was design.
WhitE LighteR
post Dec 7 2009, 12:59 PM

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QUOTE(nujo87 @ Dec 7 2009, 12:50 PM)
IC,tat means for city driving(mostly lower than 4000RPM),old mitsu engine/earlier torque peak engine r better,rite?
I think i got all my question answered,thx for urs opinion notworthy.gif

n next time when im going to pick a car,i should ask for their torque curve graph for deeper understanding to tat car performance,B4 this discussion HP is the only thing i c when comparing car performance sweat.gif
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4k shift in city is insane lea.. normally is like 2.5k nia laugh.gif

besides i dont think they hav torque curve graph at car showroom besides the generic ones. lookin at the chart is one thing. understanding is another
WhitE LighteR
post Dec 7 2009, 01:23 PM

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QUOTE(Eventless @ Dec 7 2009, 01:12 PM)
Based on the description given by wikipedia on horsepower and torque, it looks like your torque is limited by the amount of horsepower that can be produced by the engine. Horsepower is the amount of power which an engine can produce. Torques determines that amount of power available at a given rpm. The amount of power produced due to torque cannot be more than the amount of power produced by the engine. In another word, don't expect a lot of torque from a car with low horsepower.

As long as a car can produce enough power to overcome resistance from friction and air resistance, it will accelerate. Friction and other resistances increases as the speed of a car increases. Having a car with peak torques at high rpms means that it will have a higher top speed as there's more power to overcome friction and air resistance at higher speeds. Having peak torque at lower rpms means having a car the can carry heavier loads but don't expect it to go fast.

A car running at lower rpms will use less fuel compared to one running at higher rpms. So in theory, a car that is running at lower rpms most of the time should consume less fuel. The problem with comparing fuel efficiency based on the running rpm of an engine is that different engines will burn fuel at a different rate at the same rpm.
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sweat.gif no one will understand u
WhitE LighteR
post Dec 7 2009, 08:50 PM

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QUOTE(alaskanbunny @ Dec 7 2009, 07:31 PM)
sporty way? there's nothing sporty about the campro... just because it is a small & inferior engine it has to be rev higher..
ermm.. good comparison, but not nessesary... no1 could be having better fc... 2x the rpm doesnt mean 2x d fc..
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i think u got me wrong.. wut i meant was tht the torque peak much later at the band.. not earlier like 4g18. btw.. all NA cars need to rev higher to draw out the power.. im not a car idiot..
WhitE LighteR
post Dec 8 2009, 05:33 PM

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dun care la wut the theory is.. pedal to metal = win
WhitE LighteR
post Dec 9 2009, 09:56 AM

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All this theory is good. but if u cant apply. its all just talk and no meaning...

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