Thread Starter
#1
hi what difference it make in driving when engine cc is different but horsepower and torque are same?
Same CC But Different Horsepower: What’s the Difference?
- Thread Starter slow driver
- Start date
Re: difference in driving when engine cc are different but hp is same
Either Torque or HP would be more for higher cc engine.
Either Torque or HP would be more for higher cc engine.
Re: Same CC But Different Horsepower: What’s the Difference?
If both are the same, then you are carrying additional dead weight![[lol]](https://www.theautomotiveindia.com/forums/images/smilies/Laugh.gif "Laugh [lol]")
Just kidding there, normally when the cc is more with the same performance figures is because they have to get the certification by the homologation authorities (ex. ARAI in India) to meet the tailpipe emissions under control. Usually, mostly power to capacity ratios are due to this, and most others are detuned for lower power to meet the national standards for road safety regulations, and also practicality of the end user is taken in account too. We Indians are very curious in the quantity rather than quality in general, so the psychological factor is also there![[;)]](https://www.theautomotiveindia.com/forums/images/smilies/Wink.gif "Wink [;)]")
The de-tuning is also done to achieve savings in the costs in complete development/redesign a lower sized engine/powertrain which eventually add to the costs finally to the car/automobile owners.
If both are the same, then you are carrying additional dead weight
Just kidding there, normally when the cc is more with the same performance figures is because they have to get the certification by the homologation authorities (ex. ARAI in India) to meet the tailpipe emissions under control. Usually, mostly power to capacity ratios are due to this, and most others are detuned for lower power to meet the national standards for road safety regulations, and also practicality of the end user is taken in account too. We Indians are very curious in the quantity rather than quality in general, so the psychological factor is also there
The de-tuning is also done to achieve savings in the costs in complete development/redesign a lower sized engine/powertrain which eventually add to the costs finally to the car/automobile owners.
Thread Starter
#4
bigger cc engine has less torque and hp..why? whats difference?
@Slow driver:
Actually the difference in power comes due to various processes like turbocharging,supercharging,variable valve timing etc etc.
Hence if two engines are there with same power and torque but different displacement then there may be any one of the above mentioned reasons behind that.
Now for example we have two diesel engines both producing 150 bhp of power and 320 nm of torque while the displacement of one engine is 3000 cc while that of other is 2000 cc,both are using the turbochargers for the power boost.
Now until the turbo starts up,the engine with higher displacement will be better and will be more responsive but as soon as the turbo starts up,then the engine which is lighter in weight will perform better,rest the responsiveness of the higher displacement engine will be still somewhat equal to the lower one.
Its not true that bigger cc engines have less power and torque,but its just the way they are tuned.A Scorpio's MHawk produces less power than a Cruze,but the way the engines behave is different,while the Scorpio's engine is good at delivering quite good torque at any rev range the Cruze suffers from excessive turbo lag.So its just the way engine is tuned,nothing else.
Rest it also matters that at that rev range you are getting the maximum power,like the bigger engine will give all its 150 bhp at about 1000 rpms before the one with 2000 cc.
HENCE YOU CAN SAY..
"THERE IS NO REPLACEMENT TO DISPLACEMENT"-Enzo Ferrari.
Actually the difference in power comes due to various processes like turbocharging,supercharging,variable valve timing etc etc.
Hence if two engines are there with same power and torque but different displacement then there may be any one of the above mentioned reasons behind that.
Now for example we have two diesel engines both producing 150 bhp of power and 320 nm of torque while the displacement of one engine is 3000 cc while that of other is 2000 cc,both are using the turbochargers for the power boost.
Now until the turbo starts up,the engine with higher displacement will be better and will be more responsive but as soon as the turbo starts up,then the engine which is lighter in weight will perform better,rest the responsiveness of the higher displacement engine will be still somewhat equal to the lower one.
Its not true that bigger cc engines have less power and torque,but its just the way they are tuned.A Scorpio's MHawk produces less power than a Cruze,but the way the engines behave is different,while the Scorpio's engine is good at delivering quite good torque at any rev range the Cruze suffers from excessive turbo lag.So its just the way engine is tuned,nothing else.
Rest it also matters that at that rev range you are getting the maximum power,like the bigger engine will give all its 150 bhp at about 1000 rpms before the one with 2000 cc.
HENCE YOU CAN SAY..
"THERE IS NO REPLACEMENT TO DISPLACEMENT"-Enzo Ferrari.
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Thread Starter
#6
TSIVipul very good reply cleared my doubt. thanks ![[clap]](https://www.theautomotiveindia.com/forums/images/smilies/Clap.gif "Clap [clap]")