power or torque..?

[metalrizca]

if i have to choose one,between power or torque..which one should i choose..?and why..?

 

[bmwcar]

depends on what you want. To put it into perspective using boxing,
1) power is how fast you punch
2) torque is how hard you punch

If you enjoy having to drive fast without revving the engine, torque is the way to go.......was in a 320cdi and at 2k to 3k rpm, that car has enough torque to out accelerate a 325i on kickdown mode......

 

[metalrizca]

thanks..

so, inline-6 has more torque..
and inline-4 has more power..

am i rite..?

 

[Alvin]

Wrong. there is no substitute for engine displacement unless your go force induction. More CC = more torque & BHP. The comparision given is not a real one as the 320D is a diesel turbo n the 325i is a NA. For drivability torque is indeed to way to go as it improves how your car pulls in gears. BHP you will feel especially in your top speed & how the car revs.

Just a simple explanation but i'm no engineer.

 

[f8.]

for flat out straight line driving like sprinting with pedal to the metal hp rules.

for all else, torque rules.

 

[chairoger]

BOTH if possible

 

[selespeed]

if i have to choose one,
between power or torque..
which one should i choose..?

and why..?

i would choose HP because BHP is a function of RPM. the higher the rpm the higher the power. this is why for racing BHP matters more. more revv more BHP and torque doesn't matter anymore.

torque is only good up to a certain point until BHP cuts over. to9rque is good to haul a heavy mass. but flattens out after a while.

honda has low torque but high BHP (high revv) and that makes it ideal for racing

longhorn

 

[DingChavez]

just to slightly correct there selespeed. BHP is a function of RPM and Torque. Basically torque times RPM divided with constant (i dont remember the constant) equals HP. So if you have a low torque engine, you need revs to gain more horses ie the honda way or if you have a lot of torque, you do not need to rev the engine as high to get the same amount of horses. the thing is that engines that are designed to produce high torque (long stroke, heavy flywheel etc etc) does not like to rev so much. ie limiting the horses that can be produced.

to answer the main question, i'll go for torque any day.!

 

[jsen]

ding was right...thats how it goes..

seee the diff in 325 n 328.. 1 hp 40 torque extra... maintain rpm.. but the torques there really kills..

one more vote for TORQUE..

 

[selespeed]

just to slightly correct there selespeed. BHP is a function of RPM and Torque. Basically torque times RPM divided with constant (i dont remember the constant) equals HP. So if you have a low torque engine, you need revs to gain more horses ie the honda way or if you have a lot of torque, you do not need to rev the engine as high to get the same amount of horses. the thing is that engines that are designed to produce high torque (long stroke, heavy flywheel etc etc) does not like to rev so much. ie limiting the horses that can be produced.

to answer the main question, i'll go for torque any day.!

the constant is 5252. i said beyond this amount or the "cut off", BHP takes over. you can't have linearly high torque for a car engine because of the form factor because torque = force (turbo or more displacement) * distance (stroke). there is only a finite amount of torque for an engine of a GIVEN size or CC.

this explains why truck engine is big but low tech and low revv because truck is heavy.

but we're talking about car here and performance cars hopefully. while weight remains low (or tried to be as low as possible), you dont need high torque (high displacement or turbo or both). for a car of specific weight say, 1400kg, there is only so much torque required to move it first but to accelerate faster, it will have to be BHP beyond a certain revv where torque flattens, it will have to be BHP. that is why i said BHP is more important. i would like to have a car with sufficient torque to move the car and adequate accleration but wiht lots of high revv hopefully beyond 10,000 rpm to go fast and this gives me power. look at F1 engines, for instance, very high revv for a small engine and very high power for a small engine!

racing engines put more emphasis on BHP than torque. so, for me, give me an engine wit high BHP without too high displacement and turbo! hopefully s2000 engine dubbed the "king of head" can go beyond 10,000 rpm in the next version.

BHP for me anytime!

longhorn

 

[AstroCreep]

...if you get to compare between these two.....
E39 525i = 192 BHP (M54) with 181 lb-ft
E39 528i = 193 BHP (M52) with 207 lb-ft

... I can assure you the 528i will make you smile, even thought the torque is just 10% more..

(on the other hand, the road-tax will make you frown..)

 

[xNigelx]

Hi Bro,
I will have both if possible.But if only one,i will choose torque.
Cheers!!

 

[DingChavez]

the constant is 5252. i said beyond this amount or the "cut off", BHP takes over. you can't have linearly high torque for a car engine because of the form factor because torque = force (turbo or more displacement) * distance (stroke). there is only a finite amount of torque for an engine of a GIVEN size or CC.

this explains why truck engine is big but low tech and low revv because truck is heavy.

but we're talking about car here and performance cars hopefully. while weight remains low (or tried to be as low as possible), you dont need high torque (high displacement or turbo or both). for a car of specific weight say, 1400kg, there is only so much torque required to move it first but to accelerate faster, it will have to be BHP beyond a certain revv where torque flattens, it will have to be BHP. that is why i said BHP is more important. i would like to have a car with sufficient torque to move the car and adequate accleration but wiht lots of high revv hopefully beyond 10,000 rpm to go fast and this gives me power. look at F1 engines, for instance, very high revv for a small engine and very high power for a small engine!

racing engines put more emphasis on BHP than torque. so, for me, give me an engine wit high BHP without too high displacement and turbo! hopefully s2000 engine dubbed the "king of head" can go beyond 10,000 rpm in the next version.

BHP for me anytime!

longhorn

yes you are right on that. well that's your choice BHP. Maybe it's the way you drive kot. true for racing, BHP is everything but for road use BHP is nothing, torque moves you. In KL how often you get to bounce of the redline? how often you spent time in the upper quarter of your rev range say 5K to 6K rpm?

that said, BHP also is nice

 

[metalrizca]

erm..
thanks to all bros..

the reason i ask this question,
i was comparing e30 inline-6 engine,
with e30 m3 inline-4 engine..

 

[kevster30]

erm..
thanks to all bros..

the reason i ask this question,
i was comparing e30 inline-6 engine,
with e30 m3 inline-4 engine..

The e30 m3 inline-4(S14) was built for track use. If it is high revs and pulling through gears and screaming like a banshee that you are after, this is the one for you, cause nothing much happens below 4000rpms.

The e30 inline-6 engine(M20) is smooth and creamy with decent power. If refined power is what you seek, this is the way to go.

Having driven both, I'll have to go with the M20 for daily driving and the S14 for my track days.

That being said.....TORQUE RULES!

 

[kelvinp]

the constant is 5252. i said beyond this amount or the "cut off", BHP takes over. you can't have linearly high torque for a car engine because of the form factor because torque = force (turbo or more displacement) * distance (stroke). there is only a finite amount of torque for an engine of a GIVEN size or CC.

this explains why truck engine is big but low tech and low revv because truck is heavy.

but we're talking about car here and performance cars hopefully. while weight remains low (or tried to be as low as possible), you dont need high torque (high displacement or turbo or both). for a car of specific weight say, 1400kg, there is only so much torque required to move it first but to accelerate faster, it will have to be BHP beyond a certain revv where torque flattens, it will have to be BHP. that is why i said BHP is more important. i would like to have a car with sufficient torque to move the car and adequate accleration but wiht lots of high revv hopefully beyond 10,000 rpm to go fast and this gives me power. look at F1 engines, for instance, very high revv for a small engine and very high power for a small engine!

racing engines put more emphasis on BHP than torque. so, for me, give me an engine wit high BHP without too high displacement and turbo! hopefully s2000 engine dubbed the "king of head" can go beyond 10,000 rpm in the next version.

BHP for me anytime!

longhorn

*yawns* oh..err.. TORQUE RULES...

 

[ALBundy]

Selespeed, there is a couple of Honda S2000 for sale, try getting one for a test drive.

 

[selespeed]

Selespeed, there is a couple of Honda S2000 for sale, try getting one for a test drive.

yeah, where? what's the everage price like?

 

[ALBundy]

Check out motortrader la, there is a red one for sale. Price doesnt matter, you are going for test drive only and then tell us if you still bhp rules over torque.

 

[selespeed]

if torque is too low, then driving around town is difficult but then again i said SUFFICIENT torque.

of course best to have both but this is not possible and i do not want a BIG engine - expensive tax, to heavy, too clumsy! so,

in the final analysis, i still go for BHP!