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 Torque and power graphs for Logans

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ashutosh
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PostSubject: Torque and power graphs for Logans   Wed Jan 23, 2008 10:51 pm

Follow are the torque and power graphs for the different engines for the Logan:

1.4 K7J 75ch


1.6 16v


1.5 dCi


Last edited by on Thu Jan 24, 2008 2:32 am; edited 1 time in total
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sAuMiL
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PostSubject: Gr8 job mate!   Thu Jan 24, 2008 1:57 am

This is Rockstar What a Face piece of stats!!
KUDOS to u ASHUTOSH!!!

cheers cheers cheers cheers

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ashutosh
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PostSubject: Re: Torque and power graphs for Logans   Thu Jan 24, 2008 2:33 am

thanks man! thought the graphs will be some of help.

cheers
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PostSubject: Re: Torque and power graphs for Logans   Fri Jan 25, 2008 12:25 pm

He guys.. Enjoy the complete technical specification of Logan..

Renault Logan


Technical Data of Renault Logan


There will be 3 engine versions: Renault 1.4 of 75 HP and 1.6 of 90 HP, and a diesel 1.5 dCi of 65 HP will join them later. There will also be a diesel engine of 85 HP dCi.

Renault LoganPetrol engines
EngineK7JK7M
Type of gearboxManualManual
Emission controlEuro 4Euro 4
Renault Logan ENGINE
Engine typeK7J 710K7M 710
Displacement (cc)13901598
Bore x stroke (mm)79.5 x 7079.5 x 80.5
Number of cylinders44
Compression Ratio9.5:19.5:1
Total number of valves88
Max. power kW (hp)55 (75)64 (90)
Max. engine speed (rpm)55005500
Max. torque (m-kg)112128
Redline (rpm)30003000
Type of fuel injectionmultiportmultiport
Fuel typepetrolpetrol
Catalytic converterSS
Renault Logan GEARBOX
TypeJH1JH3
Number of forward gears55
Speed (km/h) at 1000 rpm: 1st7.247.24
2nd13.1813.18
3rd19.3719.37
4th26.2126.21
5th33.9433.94
Renault Logan STEERING
Turning circle (m)10.5
Steering turns to lock (manual / power)4.5 / 3.2
Renault Logan SUSPENSION
Front suspensionMacPherson strut with wishbone arm
Rear suspensionH-type torsion beam with programmed deflection and coil springs
Diameter of antiroll bar (mm)24.5
Renault Logan WHEELS AND TYRES
Wheel standard (in)5,50 J 146,0 J 15
Tyre reference Fr/Rr165/80 R14185/65 R15
Renault Logan BRAKES
Type of braking circuitX
ABS Bosch 8.0optional/serie
Electronic brakeforce distributionoptional/Standard
Servobrakes Single / Double - diam. (in)S - 9
Front brake diska (mm)238 / 259
Rear brake drums (in)7 / 8


Nishanth
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Dushie
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PostSubject: Re: Torque and power graphs for Logans   Sat Jan 26, 2008 11:11 pm

Excellent work guys .... Very Informative Rolling Eyes
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ezee
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PostSubject: Re: Torque and power graphs for Logans   Fri Feb 15, 2008 7:21 pm

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Mir...
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 24, 2009 12:03 pm

can some one provide more inputs as to how to interpret torque and power figures in layman terms?

all i know is torque corresponds to accelaration and hence pickup
whereas power corresponds to the limits that the machine can go and hence top speeds. also both are related to each other.

i also understand that there are several other factors like gear ratios, power to weight etc. but thats all highly complex.

what i want to know is
1. can someone, just by looking torque figures in nm @ rpm and power figures in bhp @ rpm make a word about the engine performance as to whether it can be better, faster, higher top speeds etc...

for example:
i have two model of cars both petrol and around same cc. Can we draw any conclusions on basis of below figures?

Max TorqueMax PowerEngine cc
Model
Indigo XL Grand Petrol124 nm @ 3500 rpm99 bhp @ 6100 rpm1396 cc
Logan 1.4 GLX Petrol110 nm @ 3000 rpm75 bhp @ 5500 rpm1390 cc



i tried drawing some conclusion myself and came to below statements:
a. top speed of indigo xl on highway will be more as compared to the top speed of logan 1.4glx. so lets say if logan top speed can be 160 kmph, indigo xls's would be may be around 180 kmph. (indigo has higher bhp as compared to logan)
b. pickup of logan would be better than that of indigo in lower rpm range. so till 160 kmph logan always overpowers indigo. (logan torque is higher at lower rpms)
c. Logan engine can run at lower speeds on higher gears better as compared to Indigo XL. So logan can run without knocking in 5th gear at say 20kmph but if same is tried on Indigo XL it may stall abruptly. (logan torque is higher at lower rpms)

2. Am i correct on all (a) , (b) and (c) above? If not what is correct? Or nothing can be derived from the figures i have.

NOTE: some useful tips
PS, bhp are units of power
Nm, Kgm are units of torque
1 PS = 0.986 bhp
1 Kgm (Kilogram-force meter) = 9.807 Nm (Newton-meter)
power = torque * rpm / 5252 [where torque has to be in ft-lb i.e. foot pounds]

Torque drops after certain rpm: This is the peak point.

Now though torque drops, it does not mean power will also drop at the same time.
Answer is in equation
power = torque * rpm / 5252
which says that though torque drops, if rpm increase ultimately power increases. however at one point torque drops significantly that the rpm rise is nearly nullified and this is where the power then drops.
Due to this the power peak will always be after torque peak.


Last edited by Mir... on Fri Jul 24, 2009 1:05 pm; edited 1 time in total
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Logan_loverinDelhi
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 24, 2009 12:46 pm

wonderful stats.. just one clarification.. I restrict my interject to the 1.6ltr petrol for obvious selfish reasons..

I see all these data are for a 16valve engine.. the Indian version is an 8 valve engine.. wouldn't the curves change as a consequence?


Last edited by Logan_loverinDelhi on Fri Jul 24, 2009 1:13 pm; edited 1 time in total
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Mir...
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 24, 2009 1:03 pm

I would say, lets not focus to whether 1.6 or 1.4.
Lets focus to the core question. Once we have some answer on that we can then easily draw the same for any engine capacity in matter of minutes.

All figures are for our Indian existing engines. Also we are to focus on only two things
torque figures
and
power figures
to find out how can these two help draw some conclusions.

lets keep all other things out for now.

i request all to provide inputs as i am not able to get to anything.
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Mir...
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PostSubject: Re: Torque and power graphs for Logans   Mon Jul 27, 2009 12:00 pm

forum members, kindly give your inputs.
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RajeshNamb
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PostSubject: Re: Torque and power graphs for Logans   Thu Jul 30, 2009 6:11 pm

Mir... wrote:
can some one provide more inputs as to how to interpret torque and power figures in layman terms?

all i know is torque corresponds to acceleration and hence pickup
whereas power corresponds to the limits that the machine can go and hence top speeds. also both are related to each other.

Mir, its actually the other way around. BHP corresponds to acceleration. Torque is the turning power transmitted to the wheels.
If the engine is able to achieve peak torque at the lowest possible RPM it can be termed as good. In city conditions one will have to downshift less to get the vehicle moving in slow traffic or the vehicle can be driven in higher gears in lower rpms thereby increasing fuel efficiency.
Tractors normally have a high torque due to the task for which they are designed, ploughing etc.
On the other hand BHP decides the rate of acceleartion. It is especially useful on highways or to get away from signals. Sports cars have high BHPs.
Again the maximum speed which a vehicle can achieve depends on the engine capacity, weight of the vehicle and gear ratios among others.
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 31, 2009 11:46 am

http://www.vettenet.org/torquehp.html

THIS should answer your question without charts study
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sAuMiL
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 31, 2009 1:16 pm

@ Rajesh, u made it pretty simple, thanks..

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vsuprak
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 31, 2009 7:23 pm

Finally I get my 1.5 dCI graph here after long time of waiting.
Thanks guys!
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RajeshNamb
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PostSubject: Re: Torque and power graphs for Logans   Fri Jul 31, 2009 11:02 pm

You are welcome, SaUmiL. Smile
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tomlai
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PostSubject: Re: Torque and power graphs for Logans   Sat Aug 01, 2009 2:03 am

Still looking for that elusive BSFC chart for the Logan K7J engine ....
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Mir...
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PostSubject: Re: Torque and power graphs for Logans   Sat Aug 01, 2009 12:39 pm

hmmm. guys thanks for inputs.


Last edited by Mir... on Fri Apr 19, 2013 6:13 pm; edited 1 time in total
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Mir...
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PostSubject: Re: Torque and power graphs for Logans   Sat Aug 01, 2009 7:10 pm

Also all the a, b and c in my earlier comment are correct based on a assumption that both Indigo XL Petrol and Logan carry identical gear ratios and have almost similar weights.
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Mir...
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PostSubject: Re: Torque and power graphs for Logans   Fri Apr 19, 2013 6:03 pm

Another interesting point I noticed is Renault Logan, Duster and Fluence when against competitors in same segment, have too low bhp and Nm figures.

For example Logan is 1400 cc with 75bhp and 107.873 Nm where as Tata Manza Safire is 1400cc with 88.8bhp and 116Nm which is definitely higher as compared to Logan. FIAT Linea compares to Manza. In fact as per my readings in all 1400 cc cars available in market Logan has the least bhp and Nm.
Volkswagen Jetta 1400cc is amazingly with 120.3bhp and 200Nm. I guess it would have something like turbo charged engine may be. So it can be put out of this comparison.

Duster 1600cc comes with 102.6bhp and 145Nm. Skoda Rapid 1600cc though Sedan and not SUV comes with 105bhp and 153 Nm.

Fluence 2000cc comes with 135.1bhp and 190 Nm whereas SKODA Laura though 1800cc comes with 157.8bhp and 250Nm which is a massive difference.
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PostSubject: Re: Torque and power graphs for Logans   Fri Apr 19, 2013 6:08 pm

Some figures

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PostSubject: Re: Torque and power graphs for Logans   Wed Apr 24, 2013 3:51 pm

This is easy to answer ! Check the weights of the other cars Dacia or as you call it Mahindra or Renault Duster weighs a lot less due to cost cutting
This is why a Dacia Logan 1400 can wipe the arse off a VW Golf with a 1400 motor at the traffic lights clown
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