most economical driving speed

Sahil · 31st July 2007, 10:18

I think 60km/hr in 5th gear is a good combo of speed and efficency as the rpm is well below 2000.

WhiteKnight · 31st July 2007, 10:28

Quote:

Originally Posted by tsk1979

I am a diesel head, what do I know

Hmm...Mods quipping at hapless members

xinome · 31st July 2007, 10:30

i dont know about you guys but i find 70kmhr the normal speed if your running on free flow and a CIA, i achieved crazy miellage figures,

i dont care what people say i achieved 25kmpl, and for the last time i am not selling my car!

Mr.Bangalore · 31st July 2007, 11:10

it not only depends on how one drives, it also depends on other factors like the fuel, engine condition, tyre pressure, aerodynamics, weight, and finllay who is driving..

Mayavi · 1st August 2007, 03:42

Good luck to all those trying to get maximum FE driving at a fixed speed.

arunkumar_rec · 13th December 2007, 09:51

Friends, Car to me has to be a mean machine which atleast should be driven at 80-90kmph. But few of our friends are advocating to drive at 50-60kmph to get a greater mileage. But for getting a greater mileage you should drive on two wheels only(i mean two wheelers like bikes!!!!). Come on.. I dont want scooty ladies to overtake my car and give a hard to understand look at me as if they have conquered something.
No offences meant!!! on a lighter note!!!

nitrous · 13th December 2007, 11:04

My most economical speed in the 1.3 push-rod ikon is 100kph.
19.75kmpl is what I got.

speed_devil · 13th December 2007, 15:37

One can achieve crazy FE figures by driving at optimum rpm in all gears and not ripping with a lot of sedate cruising.
But then whats the point of doing that if your not gonna enjoy it. I would say drive and have fun and don't think too much about FE.

joseph5600 · 14th December 2007, 13:51

I own a Getz PRIME 1.1. The manual suggests the best optimal speed on 5ht gear to be 60 km/h. But the speedometer shows a red line at 50 km/h (Looks like an economy indication) I am still confused as of what would be the optimal speed (or RPM in 5th gear) to get max. fuel efficiency. Right now I am getting around 12km/l in city with 30% A/C.

sumeethaldankar · 15th February 2008, 23:58

Hi,on my 800 carb model driving on the mumbai goa highway at a indicated speed of 70 kmph on the speedometer would return a average of 19 kmpl.We would reach our destination,Vengurla which is 540 kms from mumbai in 10 hrs.

Xehaust · 16th February 2008, 04:34

Does anyone know at what RPM is the peak-torque of an Opel Astra?
(1.6 Petrol) And what would be the best speed for better FE?

You see, Astra anyways is not an efficient car, but drives & handles like a dream so i drive spirited every once in a while and she drinks petrol like water, so i try to drive economically the rest of the time to make up for it & squeeze a little more efficiency.

binz · 16th February 2008, 04:44

If it shares its engine with the 1.6 corsa,then:
Peak torque:12.2kgm at 3200rpm
Peak power:92bhp at 5600rpm

sushrutha · 18th February 2008, 11:39

Quote:

Originally Posted by nitrous

My most economical speed in the 1.3 push-rod ikon is 100kph.
19.75kmpl is what I got.

Same with me for OHC 1.3. I got around 20.5kmpl (no luggage, 1 passenger + Myself)

Jr Godzilla · 18th February 2008, 13:04

it all depends on the sound of your vehicle when it feels least stressed is the most optimum speed with a very light foot on the pedal (just a quart depression of the pedal should see you in speeds of 80kmph+ ).

The above happens in a well maintained car and clean engine and depends very much on the Gear Ratios, 50kmph for some car may be economy but in my case with a Nissan engine i have to be above 65kmph to get to slot in Top Gear.

Xehaust · 18th February 2008, 15:44

Hey Joseph5600,
Same with my Astra, there is a red line at 50. I have always wondered why.
My Dad also said the same thing that it is where you get max.FE. But im not convinced.
And that too on a German car made for highways!
Could someone please shed some light on this.

31st July 2007, 10:18	#16
Sahil Distinguished - BHPian Join Date: May 2004 Location: Bombay Posts: 6,354 Thanked: 8,002 Times	I think 60km/hr in 5th gear is a good combo of speed and efficency as the rpm is well below 2000.
	() Thanks

31st July 2007, 10:30	#18
xinome BHPian Join Date: Feb 2007 Location: I am lost.... Posts: 339 Thanked: Once	i dont know about you guys but i find 70kmhr the normal speed if your running on free flow and a CIA, i achieved crazy miellage figures, i dont care what people say i achieved 25kmpl, and for the last time i am not selling my car!
	() Thanks

31st July 2007, 11:10	#19
Mr.Bangalore BHPian Join Date: Jul 2006 Location: Bengalooru Posts: 369 Thanked: 56 Times View My Garage	it not only depends on how one drives, it also depends on other factors like the fuel, engine condition, tyre pressure, aerodynamics, weight, and finllay who is driving..
	() Thanks

1st August 2007, 03:42	#20
Mayavi BHPian Join Date: Apr 2007 Location: Scottsdale Posts: 683 Thanked: 10 Times View My Garage	Good luck to all those trying to get maximum FE driving at a fixed speed.
	() Thanks

13th December 2007, 09:51	#21
arunkumar_rec BHPian Join Date: Aug 2007 Location: Chennai Posts: 106 Thanked: Once	Friends, Car to me has to be a mean machine which atleast should be driven at 80-90kmph. But few of our friends are advocating to drive at 50-60kmph to get a greater mileage. But for getting a greater mileage you should drive on two wheels only(i mean two wheelers like bikes!!!!). Come on.. I dont want scooty ladies to overtake my car and give a hard to understand look at me as if they have conquered something. No offences meant!!! on a lighter note!!!
	() Thanks

13th December 2007, 11:04	#22
nitrous Senior - BHPian Join Date: May 2004 Location: UAE/Lon/Madras Posts: 6,965 Thanked: 333 Times View My Garage	My most economical speed in the 1.3 push-rod ikon is 100kph. 19.75kmpl is what I got.
	() Thanks

13th December 2007, 15:37	#23
speed_devil BHPian Join Date: Oct 2007 Location: mangalore\hyderabad Posts: 91 Thanked: 0 Times	One can achieve crazy FE figures by driving at optimum rpm in all gears and not ripping with a lot of sedate cruising. But then whats the point of doing that if your not gonna enjoy it. I would say drive and have fun and don't think too much about FE.
	() Thanks

14th December 2007, 13:51	#24
joseph5600 BHPian Join Date: Oct 2007 Location: Bangalore Posts: 113 Thanked: Once	I own a Getz PRIME 1.1. The manual suggests the best optimal speed on 5ht gear to be 60 km/h. But the speedometer shows a red line at 50 km/h (Looks like an economy indication) I am still confused as of what would be the optimal speed (or RPM in 5th gear) to get max. fuel efficiency. Right now I am getting around 12km/l in city with 30% A/C.
	() Thanks

15th February 2008, 23:58	#25
sumeethaldankar Senior - BHPian Join Date: May 2007 Location: Mumbai Posts: 4,144 Thanked: 3,666 Times View My Garage	Hi,on my 800 carb model driving on the mumbai goa highway at a indicated speed of 70 kmph on the speedometer would return a average of 19 kmpl.We would reach our destination,Vengurla which is 540 kms from mumbai in 10 hrs.
	() Thanks

16th February 2008, 04:34	#26
Xehaust BHPian Join Date: Jan 2008 Location: Mumbai Posts: 846 Thanked: 82 Times View My Garage	Does anyone know at what RPM is the peak-torque of an Opel Astra? (1.6 Petrol) And what would be the best speed for better FE? You see, Astra anyways is not an efficient car, but drives & handles like a dream so i drive spirited every once in a while and she drinks petrol like water, so i try to drive economically the rest of the time to make up for it & squeeze a little more efficiency.
	() Thanks

16th February 2008, 04:44	#27
binz Senior - BHPian Join Date: Aug 2005 Location: Bangalore Posts: 1,306 Thanked: 431 Times View My Garage	If it shares its engine with the 1.6 corsa,then: Peak torque:12.2kgm at 3200rpm Peak power:92bhp at 5600rpm
	() Thanks

18th February 2008, 13:04	#29
Jr Godzilla BHPian Join Date: Dec 2006 Location: pune Posts: 269 Thanked: 151 Times View My Garage	it all depends on the sound of your vehicle when it feels least stressed is the most optimum speed with a very light foot on the pedal (just a quart depression of the pedal should see you in speeds of 80kmph+ ). The above happens in a well maintained car and clean engine and depends very much on the Gear Ratios, 50kmph for some car may be economy but in my case with a Nissan engine i have to be above 65kmph to get to slot in Top Gear.
	() Thanks

18th February 2008, 15:44	#30
Xehaust BHPian Join Date: Jan 2008 Location: Mumbai Posts: 846 Thanked: 82 Times View My Garage	Hey Joseph5600, Same with my Astra, there is a red line at 50. I have always wondered why. My Dad also said the same thing that it is where you get max.FE. But im not convinced. And that too on a German car made for highways! Could someone please shed some light on this.
	() Thanks