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      12-14-2007, 06:57 AM   #1
AltecBX
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Question 335xi sedan vs. 335i Sedan Suspension

After reading several threads I can't seem to find an answer. I read alot of assumptions, but no real facts. Are the suspension and ride height the same? I have an 335xi with the sport package, and i know it doesn't come with sport suspension. I want to know if it has the same suspension as a 335i non sport package. Also, does the 335xi have the same suspension as the 328xi and 328i?
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      12-14-2007, 07:57 AM   #2
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Quote:
Originally Posted by AltecBX View Post
After reading several threads I can't seem to find an answer. I read alot of assumptions, but no real facts. Are the suspension and ride height the same? I have an 335xi with the sport package, and i know it doesn't come with sport suspension. I want to know if it has the same suspension as a 335i non sport package. Also, does the 335xi have the same suspension as the 328xi and 328i?
I might be wrong but I believe xi is about 10mm or so higher than i.
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      12-14-2007, 08:11 AM   #3
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What is the difference at this point, if you have already purchased?
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      12-14-2007, 09:25 AM   #4
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I want to know if there is significant differences between them.

10mm is not much.
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      12-14-2007, 09:27 AM   #5
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Quote:
Originally Posted by AltecBX View Post
After reading several threads I can't seem to find an answer. I read alot of assumptions, but no real facts. Are the suspension and ride height the same? I have an 335xi with the sport package, and i know it doesn't come with sport suspension. I want to know if it has the same suspension as a 335i non sport package. Also, does the 335xi have the same suspension as the 328xi and 328i?
My understanding is all xi's (including 335xi) w/sport or non sport have the same suspension setup which is different from the i. It's said to be firmer than regular i and not quite as firm as i w/sport.

I have an xi w/sport and the ride seems firmer and sportier to me than some of the xi loaners I've had. Could just be my imagination though. True or not, I love the ride and handling in mine.

All xi's have a slightly higher ride height than their i bretheren. Again true for all models including 335xi. Not sure what if any difference there is in height between E90/E91 xi and E92 xi models.
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      12-14-2007, 09:28 AM   #6
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The xi's have their own suspension setup which is different then the i's sport and non sport. Not sure of the ride hight but they are all within a 1/2 inch or so inch of each other.
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      12-14-2007, 09:40 AM   #7
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I checked out the 335i and 335xi. By my measurements the gap between the tire and the fender was 12mm more on the front and about 6mm higher in the back. This was on a coupe though. But I am guessing the sedan would be the exact same. At least from what I have seen.
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      12-14-2007, 10:34 AM   #8
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So there is no real documentation I can check in a website from BMW. I have done so much searching, and nothing. I just want to know if the Sports suspension is that much better. My car handles real good and my friends as the sport i, and his ride handles the same but it feels a bit tighter.
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      12-14-2007, 10:51 AM   #9
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an XI suspension is set higher than an I's suspension... the sport suspension carry the same charcteristics, as far as height difference... XI sport isn't as low as I sport.....
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      12-14-2007, 12:45 PM   #10
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All XI's have the same suspension whether you get the sport option or not. They sit about 1" to 1-1/2" taller than the sport suspension on the i.
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      12-14-2007, 12:48 PM   #11
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The regular 335 sedan/coupe (e90/e92) have largely aluminum components in the suspension system. The sport package is "calibrated" although the exact nature of this calibration is not stated on the BMW website, but presumably includes different spring and damping rates.

Here is the description of the non-xDrive 335i suspension from BMWUSA.com:

Extensive aluminum componentry, including front suspension components (forged-aluminum lower arms, steering knuckle); subframe; steering rack; and brake components
Double-pivot type front suspension with dual forged-aluminum lower arms
5-link rear suspension with cast-aluminum upper transverse arms



The 335x sedan has some steel components added to this as noted in the small print at BMWUSA.com:

328xi and 335xi have steel lower arms and a steel subframe, plus an aluminum thrust plate.


The 335x coupe (e92) does not have the steel componentry that is put on the 335x sedan. The e92 335x also lacks the "calibrated" suspension which comes on sports package equipped non-xDrive 335s.

Therefore, it seems there are four suspension variations in the three series:

1. Standard non-Xdrive
2. Sport package (non-Xdrive)
3. Xdrive Sedan
4. Xdrive Coupe
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      12-16-2007, 03:31 AM   #12
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Wish BMW would of informed us a little better.
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      12-16-2007, 09:02 AM   #13
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Look at the BMW website.

As near as I can tell....I had to zoom the spec page to 200%
The 335i sedan is listed with an overall height of 55.9
The 335xi sedan is listed with an overall height of 53.9

335i: http://www.bmwusa.com/Standard/Conte...fications.aspx
335xi: http://www.bmwusa.com/Standard/Conte...fications.aspx
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      12-16-2007, 09:07 AM   #14
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Now here, they're both listed as 55.9"
http://www.bmwusa.com/Standard/Conte...ehiclesRD.aspx

I think the differences are anecdotal.
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      12-16-2007, 09:12 AM   #15
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The cars in the lineup with "lowered" suspension height:
- all i Coupes (with or without sport)
- i Sedans with sport

These cars all have the higher suspension setting:
- i Sedan without sport package
- all xi Sedans, with or without sport
- all xi Coupes, with or without sport

Hope that helps.

In xi's, the sport package stiffens the suspension but does not lower the ride height. All i coupes have sport calibrated suspension.

D
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      12-16-2007, 09:16 AM   #16
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Quote:
Originally Posted by dougman View Post
The cars in the lineup with "lowered" suspension height:
- all i Coupes (with or without sport)
- i Sedans with sport

These cars all have the higher suspension setting:
- i Sedan without sport package
- all xi Sedans, with or without sport
- all xi Coupes, with or without sport

Hope that helps.

In xi's, the sport package stiffens the suspension but does not lower the ride height. All i coupes have sport calibrated suspension.

D

Can you link to where you obtained these numbers? I'm very curious, as I'm working on my suspension upgrades right now.
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      12-16-2007, 11:13 AM   #17
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Quote:
Originally Posted by TurboFan View Post
Look at the BMW website.

As near as I can tell....I had to zoom the spec page to 200%
The 335i sedan is listed with an overall height of 55.9
The 335xi sedan is listed with an overall height of 53.9

335i: http://www.bmwusa.com/Standard/Conte...fications.aspx
335xi: http://www.bmwusa.com/Standard/Conte...fications.aspx
The xi looks like a coupe. I think that's why the height is different.

From BMWUSA, These numbers ar ethe same.
Specifications & Dimensions Sedans
335xi / 335i
Exterior length 178.2 " / 178.2 "
Exterior body width 71.5 " / 71.5 "
Exterior height 55.9 " / 55.9 "
Wheelbase 108.7 " / 108.7 "
Turning radius 18.0 ' / 18.0 '
Front legroom 41.5 " / 41.5 "
Rear legroom 34.6 " / 34.6 "
Front headroom 38.5 " / 38.5 "
Rear headroom 37.5 " / 37.5 "
Front shoulder room 55.4 " / 55.4 "
Rear shoulder room 55.1 " / 55.1 "
Passenger volume 93.0 cu.ft. / 93.0 cu.ft.
Cargo capacity 12.0 cu.ft. / 12.0 cu.ft.
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      12-16-2007, 11:18 AM   #18
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no they are different and the reason all the non xi suspensions won't work with the xi's is because of the added weight in the front which adds understeer and even makes it worse when adding a suspension that is not setup for the xi but the rwd version....the ride height is also different which makes a huge diff allso...i even just read in tech talk in roudel the same thing i just said....you need to get it setup differently because of the weight and height differences..if bmw made them the same with the xi and rwd versions they would drive like crap and understeer even more...which is why they are different!!!
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      12-16-2007, 11:26 AM   #19
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From what I read, the xi steel just adds a few lbs to the front suspension. It's not noticable when car is moving.
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      12-16-2007, 11:43 AM   #20
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They had to swap out some of the aluminium for steel in the xi's front axle to beef it up because it's powered.
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      12-16-2007, 01:42 PM   #21
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Quote:
Originally Posted by AltecBX View Post
From what I read, the xi steel just adds a few lbs to the front suspension. It's not noticable when car is moving.
Whether noticeable or not is subjective, but it is certainly most advantageous when moving to have lighter suspension components.
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      12-16-2007, 01:45 PM   #22
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Quote:
Originally Posted by Sparkplug View Post
They had to swap out some of the aluminium for steel in the xi's front axle to beef it up because it's powered.
The Xi coupe has forged components, so it's not because the front wheels have power applied to them. It is likely that the sedan has steel components because BMW feels that if one wanted a sportier Xi, they would buy the coupe. I don't agree with that, but it's likely the case.
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