Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 26th December 2015, 23:57   #76
BHPian
 
petrolhead_neel's Avatar
 
Join Date: Sep 2014
Location: Burdwan
Posts: 625
Thanked: 1,033 Times
Default Re: Your car's engine rpm at highway cruising speeds

Car: Ford Classic 1.6 Duratec

80 km/h: 2700 RPM
100 km/h: 2900 RPM
120 km/h: 3100 RPM

*in 5th gear

Does not feel strained at all, with 5 people pn board, AC on full blast and luggage to boot.

Drive safe,
Neel

Last edited by petrolhead_neel : 27th December 2015 at 00:03.
petrolhead_neel is offline   Reply With Quote
Old 27th December 2015, 16:16   #77
BHPian
 
amiya.c's Avatar
 
Join Date: Apr 2013
Location: Bangalore
Posts: 72
Thanked: 69 Times
Default Re: Your car's engine rpm at highway cruising speeds

For Ford Fiesta classic 2012: Post remap it feels relaxed at 120 km/h

5th gear stats:
80 kmph comes at 2000 rpm > Engine begs to be pushed for more
100 kmph comes at 2500 rpm
120 kmph comes at 3000 rpm > It cruises effortlessly but this is the point at which the noise starts to build.

I usually maintain 110 to 120 kmph on National highways for relaxed cruising.
amiya.c is offline   Reply With Quote
Old 28th December 2015, 16:29   #78
BHPian
 
Join Date: Dec 2015
Location: Mumbai
Posts: 62
Thanked: 109 Times
Default Re: Your car's engine rpm at highway cruising speeds

2015 Hyundai Elite i20 Asta CRDi

100 kmph @ 2050 rpm
120 kmph @ 2500 rpm

This is in 6th gear with the ACC running. Haven't tried going much above these speeds as the engine starts sounding pretty stressed.

I usually try to maintain speeds of 100 - 110 kmph on Highways for relaxed cruising and optimal FE.
phoenixash is offline   Reply With Quote
Old 28th December 2015, 22:42   #79
BHPian
 
Join Date: Feb 2015
Location: BANGALORE
Posts: 28
Thanked: 5 Times
Default Re: Your car's engine rpm at highway cruising speeds

Hi All,

My Swift Vxi VVT :

80 kmph - 2200 RPM
100 kmph - 2750 RPM
120 kmph - 3300 RPM
140 kmph - 3900 RPM
I have not pushed it beyond 140 kmph. However , remember that there was a little more to push at the pedal while cruising at 140 kmph on 5th gear.
SAJEESH is offline   Reply With Quote
Old 29th December 2015, 14:44   #80
BHPian
 
Join Date: Apr 2011
Location: -
Posts: 858
Thanked: 1,001 Times
Default Re: Your car's engine rpm at highway cruising speeds

Quote:
Originally Posted by arjithin View Post
Ertiga Diesel (2012)

80kmph @ 1950 rpm
100 kmph @ 2450 rpm
120 kmph @ 2900-3000 rpm

Feels so noisy after 120 kmph that I don't feel comfortable pushing for cruising






The official review of ertiga says 120 kmph is at 2600 rpm, where as I see it in my car with an additional 400 rpm even with just one driver. I can think of the following reasons for variations in rpm, but none are applicable in my car

1. Non oem size tires
2. Slipping clutch
3. Tacho calibration

But I don't 'understand why the load on car makes a difference in rpm for a given gear and speed? Since the gear ratios are fixed, we should be able to calculate the rpm at which the engine should be if speed is known right? Then how load becomes a parameter?
Having owned the Ertiga before, I find the RPM quoted for 120kmph a bit on the higher side. That said, the factors that influence a certain speed at a certain RPM on the motorway are:

1) Direction of the wind: If you're driving against the draft you'll find that your vehicle reaches the same speed at a slightly higher RPM. On the brighter side, if you're on the same direction of the wind draft, you'll find that the intended speed is achieved at a slightly lower RPM, thanks to the wind pushing you.

2) Even on a visually flat motorway, there's always a slight gradient or slope that influences the rolling resistance. Don't believe me? Try cycling down the road that appears visually flat and you'll get my point. A case in point: while driving to Bangalore, my vehicle is usually at a slighter higher RPM at 120 than it is while coming back and that's because the onward journey to Bangalore from Chennai is a mild uphill all the way through and downhill on the way back.

I cannot get into technical numbers or the engineering side of gear ratios because I have no clue. But these 2 factors have consistently influenced the RPM to speed numbers. These are observations not from one but 3 vehicles that I've driven down the same road umpteen times. This could also be the reason for varying numbers on your Ertiga to the official review as roads in Kerala are seldom flat.

Last edited by swiftdiesel : 29th December 2015 at 14:48.
swiftdiesel is offline   Reply With Quote
Old 29th December 2015, 17:53   #81
BHPian
 
prithm's Avatar
 
Join Date: Jan 2015
Location: Hyderabad
Posts: 391
Thanked: 252 Times
Default Re: Your car's engine rpm at highway cruising speeds

Man.. I am seriously jealous of guys who are reporting 100 @ under 3000 rpm.

Car : DZire Petrol ZXi
Passenger : 1
Gear : 5th
80 : 2700
100 : 3000
120 : 3500
prithm is offline   Reply With Quote
Old 29th December 2015, 18:21   #82
Senior - BHPian
 
SunnyBoi's Avatar
 
Join Date: Dec 2006
Location: Mysore / B'lore
Posts: 1,582
Thanked: 2,767 Times
Default

Cedia : 2200RPM @ 100KMPH

Palio 1.6 GTX : 2700RPM @ 100KMPH

Both at 5th gear.
SunnyBoi is offline   Reply With Quote
Old 29th December 2015, 22:12   #83
BHPian
 
breezydrive's Avatar
 
Join Date: Aug 2007
Location: NOIDA
Posts: 709
Thanked: 68 Times
Default Re: Your car's engine rpm at highway cruising speeds

In my 05 days old S Cross DDIS 320 ; still in run-in period with only 440 km on the odometer till date -

120 kmph @ 2000 rpm - 6th gear
100 kmph @ 1700 rpm - 6th gear
85 kmph @1700 rpm - 5th gear

Last edited by breezydrive : 29th December 2015 at 22:14.
breezydrive is offline   Reply With Quote
Old 30th December 2015, 09:08   #84
Senior - BHPian
 
extreme_torque's Avatar
 
Join Date: Feb 2005
Location: Melbourne
Posts: 3,546
Thanked: 1,317 Times
Default Re: Your car's engine rpm at highway cruising speeds

Quote:
Originally Posted by breezydrive View Post
In my 05 days old S Cross DDIS 320 ; still in run-in period with only 440 km on the odometer till date -

120 kmph @ 2000 rpm - 6th gear
100 kmph @ 1700 rpm - 6th gear
85 kmph @1700 rpm - 5th gear
That is effortless! How does it feel at 100 kph in 6th? Would you shift down to overtake?
extreme_torque is offline   Reply With Quote
Old 30th December 2015, 10:51   #85
BHPian
 
PointZero's Avatar
 
Join Date: Dec 2015
Location: Kolkata
Posts: 244
Thanked: 1,207 Times
Default Re: Your car's engine rpm at highway cruising speeds

Mahindra Bolero M2DICR

80 Kmph @ 1800 rpm
95 Kmph @ 2000 rpm
105 Kmph @ 2200 rpm
PointZero is offline   Reply With Quote
Old 30th December 2015, 22:18   #86
BHPian
 
breezydrive's Avatar
 
Join Date: Aug 2007
Location: NOIDA
Posts: 709
Thanked: 68 Times
Default Re: Your car's engine rpm at highway cruising speeds

Quote:
Originally Posted by extreme_torque View Post
That is effortless! How does it feel at 100 kph in 6th? Would you shift down to overtake?
Not at all, at 100 kmph, it is effortless. The peak power is available @1750 rpm!

In fact, I slowed down till 65 kmph and it was comfortable to pick it up again effortlessly!

This car masks speed so well ! silently.

Whereas, in my Honda City, the speeds above 100 kmph are actually felt with engine sounding a raspy note after Vtec kicks in.

Last edited by Gannu_1 : 31st December 2015 at 05:54. Reason: ANHC > Honda City. Please avoid using acronyms when referring to cars on the forum. Thanks!
breezydrive is offline   Reply With Quote
Old 31st December 2015, 10:41   #87
Awaiting Email Confirmation
 
Join Date: Mar 2009
Location: ............
Posts: 3,260
Thanked: 4,212 Times
Default Re: Your car's engine rpm at highway cruising speeds

My XUV 500 with ACC on and 3 people on board with a lot of luggage in the sixth gear:

100 kmph in cruise control in slightly less than 2,000 rpm.
J.Ravi is offline   Reply With Quote
Old 2nd January 2016, 19:32   #88
BHPian
 
Join Date: Feb 2015
Location: BANGALORE
Posts: 28
Thanked: 5 Times
Default Re: Your car's engine rpm at highway cruising speeds

Quote:
Originally Posted by prithm View Post
Man.. I am seriously jealous of guys who are reporting 100 @ under 3000 rpm.

Car : DZire Petrol ZXi
Passenger : 1
Gear : 5th
80 : 2700
100 : 3000
120 : 3500
Hi prithm,

I think this has to do with the additional weight of your car. (I mean compared to a swift vxi ). Both cars ( vxi and zxi ) share the same engine. My car does 80 at 2200 RPM and 100 kph at exactly 2750 RPM.

Experienced friends may shed some more light here.

Thanks & Regards,

Sajeesh
SAJEESH is offline   Reply With Quote
Old 2nd January 2016, 20:29   #89
BHPian
 
Join Date: Apr 2011
Location: Pune
Posts: 521
Thanked: 450 Times
Default Re: Your car's engine rpm at highway cruising speeds

Quote:
Originally Posted by SAJEESH View Post
Hi prithm,

I think this has to do with the additional weight of your car. (I mean compared to a swift vxi ). Both cars ( vxi and zxi ) share the same engine. My car does 80 at 2200 RPM and 100 kph at exactly 2750 RPM.

Experienced friends may shed some more light here.

Thanks & Regards,

Sajeesh
Hi SAJEESH,
If Vxi and Zxi have the same engine and the same gearbox, they will have same engine rpm at given kmph in 5th gear.

If prithm notices higher rpm, he shall check the rpm once again (if he is reading the meter correctly). If the reading is correct prithm needs to check his clutch.
Rahul Bhalgat is offline   Reply With Quote
Old 2nd January 2016, 20:56   #90
Distinguished - BHPian
 
Join Date: Oct 2011
Location: India
Posts: 9,359
Thanked: 13,315 Times
Default Re: Your car's engine rpm at highway cruising speeds

Quote:
Originally Posted by prithm View Post
Man.. I am seriously jealous of guys who are reporting 100 @ under 3000 rpm.


I am jealous of all owners whose cars have 6-speed gearbox rather than 5-speed that makes cruising more effortless and silent.

I hate my Swift's NVH levels when it at 100 kmph @ 2300 RPM.
a4anurag is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Whats your comfortable cruising speed? Shan2nu Street Experiences 212 6th March 2013 12:47
Shuddering problem at highway speeds swarnava.m Technical Stuff 20 11th January 2013 06:17
Is Fuel efficiency strictly a function of RPM or is it speed+gear+RPM? Astleviz Technical Stuff 54 25th November 2011 09:22
Engine stalling at low speeds in my Fiat Grande Punto 1.2 E motor spirit Technical Stuff 20 7th February 2011 19:43
rpm below idle rpm tortoise Technical Stuff 12 2nd April 2007 00:51


All times are GMT +5.5. The time now is 04:28.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks