Err,been asked this question in Fast and furious forum,but since i think this is quite a technical subject.
So,i trying to get my answer here
Should be quite useful for us in picking up new car in the future

some existed discussion in FNF forum
http://forum.lowyat.net/topic/1250660

This post has been edited by nujo87: Dec 7 2009, 09:40 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


Another look like very simple but yet quite technical question i would like to ask
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?

This post has been edited by nujo87: Dec 7 2009, 11:21 AM

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

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

This post has been edited by nujo87: Dec 7 2009, 12:54 PM

As i know the horsepower constantly increase when RPM roll up,n normally would achieve peak HP at 6-7K RPM.
Is tat means for fastest acceleration,we should drag to 6-7k RPM b4 shift to higher gear?

For example:
we drag the 1st gear to 7k RPM to archieve Peak Horse power,
Then shift up to 2nd gear n the RPM dropped to 5k RPM,then we drag again to 7k RPM to Peak horse power,
N repeat n repeat...
So in this way we can maintain the peak HP,n btw Fastest acceleration?

I dun think all these make sense,torque is the force to twist the wheel/tyre,meaning torque high=faster acceleration,
Peak HP should be the total force created at by the car wheel at maximum RPM,meaning a metric for topspeed.

This post has been edited by nujo87: Dec 8 2009, 12:47 AM

Lets say for car 1,torque peak at 2500RPM,and slowly drop from 2.5k-4k,n a drastic drop after 4k.
Which way should be better?

1)drag to 4k RPM n then shift to higher gear,n it should drop back to 2-3k RPM.

2)drag to 6k RPM(closest to MAX HP)then only shift gear,n should be dropped to 4-5k RPM.

Seriously do u guys think,if i go to a car showroom,do i have the RIGHT to ask for their engine torque curve/HP curve chart?
Or any other way to know a car engine performance more detail?

Buy car not = buy something in pasar le

This post has been edited by nujo87: Dec 8 2009, 01:56 PM

Getting more confused....
More layman's term pls

This post has been edited by nujo87: Dec 9 2009, 12:05 PM

well,i think after this discussion we did learned more about torque n horsepower for car engine.
Hope this lil knowledge will help us out in picking new car in the future

IMHO i prefer low RPM torque power more than High RPM torque power,
becoz usually i wont drag my engine more than 3500RPM,coz very noisy n drink more petrol.

N i oso noticed some ENGINE not really as power as they stated in the performance sheet.
For example their stated Peak torque is on 150NM@4500rpm(example)
while most of the time,their average torque r much lower than the PEAK TORQUE stated,becoz their torque curve fluctuated very much
So do research more on ur potential new car