F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > xDrive All-Wheel Drive Discussions > 340ix vs m340ix 0-60
ARMA SPEED
Post Reply
 
Thread Tools Search this Thread
      11-01-2020, 12:08 PM   #1
integr8d
Registered
4
Rep
3
Posts

Drives: 2017 340i
Join Date: Apr 2020
Location: SoCal

iTrader: (0)

340ix vs m340ix 0-60

I’m sure it’s been asked a million times now. But how is it that the 2018 340i xDrive manages 0-60 in 4.9sec, while the 2020 m340i xDrive with only 62hp more does it in 3.5? Those numbers are based on C/D tested (4.9) and BMW claimed (3.5). I’ve also seen tested 0-60s of 4.1 for the m340i...

Either way and plus or minus a tenth, how does 62hp buy you nearly a second off of your 0-60? Or is that totally reasonable?
Appreciate 0
      11-06-2020, 02:40 AM   #2
passanger
New Member
Serbia
9
Rep
20
Posts

Drives: Bmw f36 428i xDrive
Join Date: Jun 2020
Location: Belgrade

iTrader: (0)

Quote:
Originally Posted by integr8d View Post
I’m sure it’s been asked a million times now. But how is it that the 2018 340i xDrive manages 0-60 in 4.9sec, while the 2020 m340i xDrive with only 62hp more does it in 3.5? Those numbers are based on C/D tested (4.9) and BMW claimed (3.5). I’ve also seen tested 0-60s of 4.1 for the m340i...

Either way and plus or minus a tenth, how does 62hp buy you nearly a second off of your 0-60? Or is that totally reasonable?
Hey integr8d, if that is a truth.
My opinion is that they didn't gained that 1.4s with hp only. It's all about combination of transmission, xdrive, tires, engine, lunch control, etc
Appreciate 1
      11-17-2020, 12:41 PM   #3
VipinLJ
Petrolhead
VipinLJ's Avatar
United_States
1937
Rep
3,520
Posts

Drives: ‘20 330i,‘16 X3,‘18 SQ5,‘17 A7
Join Date: Nov 2019
Location: Illinois

iTrader: (2)

Quote:
Originally Posted by integr8d View Post
I’m sure it’s been asked a million times now. But how is it that the 2018 340i xDrive manages 0-60 in 4.9sec, while the 2020 m340i xDrive with only 62hp more does it in 3.5? Those numbers are based on C/D tested (4.9) and BMW claimed (3.5). I’ve also seen tested 0-60s of 4.1 for the m340i...

Either way and plus or minus a tenth, how does 62hp buy you nearly a second off of your 0-60? Or is that totally reasonable?
Bmw claims 4.1s for the M340i xDrive. Not 3.5. But people have gotten 3.9s stock. And yes. It definitely feels different. I've driven the 340i and M340i back to back and the M340i undoubtedly felt much faster. 60-70hp is a pretty decent difference. Enough for a 0.5-0.7s difference at least?
__________________
Current:
2020 BMW 330i xDrive
2018 Audi SQ5 Prestige
2017 Audi A7 Prestige
Appreciate 0
      12-07-2020, 04:48 AM   #4
Skyhigh
Brigadier General
Skyhigh's Avatar
1871
Rep
3,832
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

I honestly have no idea what you guys are talking about... the numbers you state look almost random.

F3x:
BMW claims 4.9 sec 0-100 for xDrive and automatic gearbox. I for one have not seen people do appreciably faster with a stock car and measured with Dragy! If there is a record of this anywhere in the forum - please advise.

G20:
BMW claim 4.4 sec 0-100 for xDrive, automatic gearbox, limousine
The difference in power delivery is 48 PS and 50Nm in favour of the G20.
0,5 sec reduction in 0-100 sounds about right to me Maybe some minor difference in the gearbox shifting contributed to 0,1 sec out of that, but generally it sounds about right.
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."

Last edited by Skyhigh; 12-07-2020 at 06:50 AM..
Appreciate 1
J555567.00
      12-07-2020, 08:43 AM   #5
lens
Colonel
lens's Avatar
2067
Rep
2,638
Posts

Drives: 2018 340i xDrive
Join Date: Sep 2015
Location: Halifax NS, Canada

iTrader: (5)

Quote:
Originally Posted by Skyhigh View Post
I honestly have no idea what you guys are talking about... the numbers you state look almost random.

F3x:
BMW claims 4.9 sec 0-100 for xDrive and automatic gearbox. I for one have not seen people do appreciably faster with a stock car and measured with Dragy! If there is a record of this anywhere in the forum - please advise.

G20:
BMW claim 4.4 sec 0-100 for xDrive, automatic gearbox, limousine
The difference in power delivery is 48 PS and 50Nm in favour of the G20.
0,5 sec reduction in 0-100 sounds about right to me Maybe some minor difference in the gearbox shifting contributed to 0,1 sec out of that, but generally it sounds about right.
Don't forget the M340i does have LSD in the xDrive version as well, it does make a pretty good difference.
__________________
Bootmod3, CTS Catless DP, B58TU HPFP, XHP, BM3 Flexfuel Kit
Appreciate 0
      12-07-2020, 10:31 AM   #6
Skyhigh
Brigadier General
Skyhigh's Avatar
1871
Rep
3,832
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Why should that make a difference for 0-100 on a flat asphalt?
xDrive does a great job with the traction either way.
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 0
      12-07-2020, 11:08 AM   #7
lens
Colonel
lens's Avatar
2067
Rep
2,638
Posts

Drives: 2018 340i xDrive
Join Date: Sep 2015
Location: Halifax NS, Canada

iTrader: (5)

Quote:
Originally Posted by Skyhigh View Post
Why should that make a difference for 0-100 on a flat asphalt?
xDrive does a great job with the traction either way.
Instead of a one wheel peel where xDrive is gonna send power to one side, it's going to split it between two wheels equally instead giving a better launch.
__________________
Bootmod3, CTS Catless DP, B58TU HPFP, XHP, BM3 Flexfuel Kit
Appreciate 0
      12-07-2020, 11:14 AM   #8
Skyhigh
Brigadier General
Skyhigh's Avatar
1871
Rep
3,832
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Are you sure we are talking about the same thing? First of all, I am not sure I understand your explanation, but more importantly an LSD is only useful in turns or when there is a loss of traction. We are talking 0-100 here, straight line, optimal conditions (for best time). Even without LSD, XDrive does not lose traction during such acceleration (assuming stock car). I for one have 0 traction problems when doing 0-100 on a dry surface. What is an LSD going to help me with?

An LSD solves traction problems better than an open differential. In this particular case however there is simply no problem to solve.
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 1
tomppa11.50
      12-07-2020, 12:19 PM   #9
lens
Colonel
lens's Avatar
2067
Rep
2,638
Posts

Drives: 2018 340i xDrive
Join Date: Sep 2015
Location: Halifax NS, Canada

iTrader: (5)

Quote:
Originally Posted by Skyhigh View Post
Are you sure we are talking about the same thing? First of all, I am not sure I understand your explanation, but more importantly an LSD is only useful in turns or when there is a loss of traction. We are talking 0-100 here, straight line, optimal conditions (for best time). Even without LSD, XDrive does not lose traction during such acceleration (assuming stock car). I for one have 0 traction problems when doing 0-100 on a dry surface. What is an LSD going to help me with?

An LSD solves traction problems better than an open differential. In this particular case however there is simply no problem to solve.
xDrive is 40/60 split, stock cars won't have an issue launching, but a tuned one will, I spin almost everytime launching my car, normally 3.9-4 second 0-60 if the one wheel peel happens, but when it doesn't happen (launching in 2nd gear for example) I get a nice 3.7-3.8 sec 0-60.
__________________
Bootmod3, CTS Catless DP, B58TU HPFP, XHP, BM3 Flexfuel Kit
Appreciate 0
      12-07-2020, 12:42 PM   #10
Skyhigh
Brigadier General
Skyhigh's Avatar
1871
Rep
3,832
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Are we now suddenly talking about tuned cars (and why)!?

And no, XDrive's default is 40/60, but dynamically adjusted between 50/50 and 0/100.
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 0
      12-07-2020, 05:45 PM   #11
imperfectluck
Lieutenant
imperfectluck's Avatar
392
Rep
408
Posts

Drives: 20' F87
Join Date: Jul 2016
Location: NYC, New York

iTrader: (0)

340ix vs m340ix 0-60

Quote:
Originally Posted by Skyhigh View Post
Are we now suddenly talking about tuned cars (and why)!?
He was using his car which is RWD with his setup explaining how it without an LSD can have trouble putting all that power down in lower gears. You also seem to miss the point that an LSD most certainly helps you actually put down the power to the wheels so that coupled with the X Drive system allows the car to actually plant its power and not wheel spin coming off of the line while doing so.
Appreciate 0
      12-07-2020, 06:09 PM   #12
BMWILUVU
Lieutenant Colonel
809
Rep
1,597
Posts

Drives: 340ix
Join Date: Mar 2017
Location: The Boibs

iTrader: (0)

Tune to tune should be almost the same. Most 340i owners on the forum are running flash tunes so power-wise, there is only some little difference between the two for us and the M340i is heavier too.
Appreciate 0
      12-07-2020, 08:19 PM   #13
Skyhigh
Brigadier General
Skyhigh's Avatar
1871
Rep
3,832
Posts

Drives: BMW F36
Join Date: Apr 2018
Location: Europe

iTrader: (0)

Quote:
Originally Posted by imperfectluck View Post
Quote:
Originally Posted by Skyhigh View Post
Are we now suddenly talking about tuned cars (and why)!?
He was using his car which is RWD with his setup explaining how it without an LSD can have trouble putting all that power down in lower gears. You also seem to miss the point that an LSD most certainly helps you actually put down the power to the wheels so that coupled with the X Drive system allows the car to actually plant its power and not wheel spin coming off of the line while doing so.
I am sorry, I was under the impression OP's question was about the performance difference between 2 stock XDrive cars.... I must have read wrongly.

The problems a RWD/tuned car has are irrelevant here (I thought).

And yes - an LSD can help overcome traction problems (putting the power down) if such a problem exists. That is however not the case for XDrive and a typical 0-100 in a straight line under optimal conditions (which is what those times are all about). There is nothing to "help" further - the power is already down with XDrive.
__________________
"Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
Appreciate 1
      12-07-2020, 08:31 PM   #14
imperfectluck
Lieutenant
imperfectluck's Avatar
392
Rep
408
Posts

Drives: 20' F87
Join Date: Jul 2016
Location: NYC, New York

iTrader: (0)

Skyhigh No worries, the comparison isn't exactly apples to apples even when trying to equate the hp aspect of it, we all know here that is only part of the larger equation.

I agree with your second point of the XDrive putting the power down vs RWD/tuned even with an LSD as I have that combo and have issues putting ~420hp power down.

Circling back to the OPs point, I never like the peak hp comparisons as I prefer more of a "what does the power band look like" if just comparing numbers for numbers sake excluding the chassis and other important bits that contributes to the overall 0-60 times.
Appreciate 2
      12-10-2020, 05:59 AM   #15
J555
Captain
567
Rep
611
Posts

Drives: F31 LCI 340iX
Join Date: Mar 2020
Location: Europe

iTrader: (0)

Quote:
Originally Posted by integr8d View Post
I’m sure it’s been asked a million times now. But how is it that the 2018 340i xDrive manages 0-60 in 4.9sec, while the 2020 m340i xDrive with only 62hp more does it in 3.5? Those numbers are based on C/D tested (4.9) and BMW claimed (3.5). I’ve also seen tested 0-60s of 4.1 for the m340i...

Either way and plus or minus a tenth, how does 62hp buy you nearly a second off of your 0-60? Or is that totally reasonable?
The figures you question are strange. In Europe, the official 0-100 kmph figures for the G20 M340i and F30 340iX (non M Perf) are 4.3 vs 4.9 secs (both with 8-speed auto). The F30 340iX M Perf 8AT is 4.7 secs.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 04:03 AM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST