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      10-21-2012, 08:40 PM   #1
V8Beatr
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My wife has her eye on the X1 Xdrive and I want the 35i and she could care less either way if 28 or 35, except she loves driving my 135i. We'll be trading in our '10 GMC Terrain (v6) with shit for power so either will be an upgrade.

Please convince me one way or the other why or why not to spend/save the price difference.

Oh, and it'll have to be the M-Sport of course.
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      10-21-2012, 10:22 PM   #2
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You appear to live in Florida, so the presumption is that it's going to be mostly flat driving, and not a lot of snow. Unless she is going to constantly load up the car with heavy stuff or drive in semi-manual most of the time, I'd say go with the 28 "s" (28i sDrive instead of xDrive). RWD is more fun than 4WD, in my opinion, and it's (marginally) quicker than the 4WD 28i.

With the four of the 28 instead of six of the 35i, you save not only the initial price difference and lower insurance costs, but get a much better mpg, which adds up over time. If you drive 50,000 miles before selling it, at an average of $4.50/gal, that's a saving of $1,700 (hwy) - $3,100 (city) in addition to the $8,000 initial price difference. More if the gas creeps towards or cross the $5 mark, or you drive more.
Is the 15% faster 0-60 and better sound effects when accelerating in a tunnel worth more than ten grand?

Disclaimer: I ordered the 35i, but also live in steep and snowy New England, so it was for practical reasons. Otherwise, I would have gotten a 28s (or 25d if they had sold them).

Last edited by Grovsnus; 10-22-2012 at 08:50 AM.
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      10-21-2012, 10:37 PM   #3
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If you post more info about what you're looking for that will sway opinions. I'm in the same boat, debating on the 28 and 35. For me I want xenon lights (lots of deer out here) but with 28i you have to buy the premium package and the 35 it and the sunroof are included so there's $400 difference for me.

For my thoughts at the moment Pro 35:
Has more power, especially over 50mph.
Top 'model of the X1 line
Better looking wheels IMO (I like the summer performance option that's $0 cost)
Servo steering is standard (wife might really like, you might not)
Engine sounds better IMO
Cons of 35i:
Worse gas millage than 28 (Others should confirm, but I think it's only about 3-5MPG less in the real world worse than the 28, as some people report the 28 is not hitting numbers they expected. Some people said they hit 35mpg on the highway for the 35 and some report 29MPG max in the 28)
Pro's of the 28i:
Newer engine, more effecient (and avaliable/used on just about every BMW series)
8 speed transmission (quicker shifting and gives better MPG)
Possibly cheaper (unless you wanted xenon or sunroof which are about $1k each, so only $2k more for the 35i engine) depending on what options you want
Cons:
Less power
Lots of extra gear shifting (some it bothers, others like it)
ECO mode (ASS mode can be turned off though)
And two possible issues I'm watching, the 8 speed transmission doesn't have the cleanest history so far, not anything to worry about if you're not keeping the car but I plan to drive it 10-15 years (until it's dead) and I am not sure 8 speed will last longer than the older 6 speed with a better history. I also wonder how the ECO/ASS will effect the life of the starter motor and engine. So far it seems good but it's riskier IMO.

One thing I'm still checking into is if the 28i or 35i have the same brakes. I thought I rear somewhere the 35i or a certain trim had bigger brakes but I can't seem to find that information again.
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      10-21-2012, 11:28 PM   #4
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Quote:
Originally Posted by edx1 View Post
One thing I'm still checking into is if the 28i or 35i have the same brakes. I thought I rear somewhere the 35i or a certain trim had bigger brakes but I can't seem to find that information again.
As far as I know, and I'm the first to admit I could be wrong (EDIT: And I was, see Bill's reply below), the 35i was supposed to have larger brakes with brake energy regeneration, before BMW decided to add that also to the 2013 US 28i (s- and i-). All three models appear to have 13" discs, front and rear.

For European models, I do not believe that BER is standard except on the top model.
I also have not read anything about these larger BER brakes being stronger brakes, i.e. stopping the vehicle quicker, just allowing the engine to deliver more power to the wheels and less to charging, for a minimal power boost.

I also believe the M-Sport package gives you tuned dynamic brake handling linked with the ESP, where the inner wheel is braked during sharp turns when ESP deems it's safe, to give you a mild oversteer. But that doesn't change the brakes themselves.

Last edited by Grovsnus; 10-22-2012 at 10:17 AM.
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      10-22-2012, 09:21 AM   #5
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Quote:
Originally Posted by edx1 View Post
One thing I'm still checking into is if the 28i or 35i have the same brakes. I thought I rear somewhere the 35i or a certain trim had bigger brakes but I can't seem to find that information again.
The 35i front brake rotors are 348X30mm rears 336X22mm, the 28i fronts are 312X24mm rears 300X20mm.
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      10-22-2012, 09:36 AM   #6
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Originally Posted by Bill B. View Post
The 35i front brake rotors are 348X30mm rears 336X22mm, the 28i fronts are 312X24mm rears 300X20mm.
That's welcome news - I stand corrected. Does this also mean that the 28i doesn't have BER, just like originally announced, and that Autosport is in error saying that all models got the larger brakes with BER?

(Now why is this information so hard to find on the internetz?)

Last edited by Grovsnus; 10-22-2012 at 09:40 AM. Reason: Follow-up question
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      10-22-2012, 10:03 AM   #7
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Quote:
Originally Posted by Grovsnus View Post
That's welcome news - I stand corrected. Does this also mean that the 28i doesn't have BER, just like originally announced, and that Autosport is in error saying that all models got the larger brakes with BER?

(Now why is this information so hard to find on the internetz?)

The brochure indicates that they all have BER, and that makes sense because it is really a function of the charging system, not the brakes, other than the fact that it needs to sense when the brakes are applied.

They do use different generators, but aside from that not much else is different in that system.

I pretty much use realoem to determine what is different (parts-wise) between the different models when in doubt.
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      10-22-2012, 11:21 AM   #8
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I wonder if the stopping distance between the two is much if any different.

The 35 weighs 165lb's more, so I'm not sure if that negates the bigger brakes stopping in a shorter distance.

The 35 also is a 52.1/47.9 weight distribution vs the 50.6/49.4 of the 28. A local SA said there is a noticeable difference but I would think occupants would affect the distribution more, am I wrong? 3 series xdrive28i is 51.3/48.7 for reference, and the xdrive35i is 52.2/47.8.
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      10-22-2012, 11:44 AM   #9
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Quote:
Originally Posted by edx1 View Post
I wonder if the stopping distance between the two is much if any different.

The 35 weighs 165lb's more, so I'm not sure if that negates the bigger brakes stopping in a shorter distance.

The 35 also is a 52.1/47.9 weight distribution vs the 50.6/49.4 of the 28. A local SA said there is a noticeable difference but I would think occupants would affect the distribution more, am I wrong? 3 series xdrive28i is 51.3/48.7 for reference, and the xdrive35i is 52.2/47.8.
It could be related to pads too, but the pedal feel sure felt better on the 35i and is one of the reasons we chose it over the 28i. I'd guess initial stopping differences aren't all that different, but the capability of the 35i's larger rotors to dissipate heat is much, much better, not only are they taller, but they're also significantly thicker and better vaned, so braking distances over multiple stops should start to show sizable advantages.
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      10-22-2012, 12:52 PM   #10
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Quote:
Originally Posted by edx1 View Post
I wonder if the stopping distance between the two is much if any different.

The 35 weighs 165lb's more, so I'm not sure if that negates the bigger brakes stopping in a shorter distance.

The 35 also is a 52.1/47.9 weight distribution vs the 50.6/49.4 of the 28. A local SA said there is a noticeable difference but I would think occupants would affect the distribution more, am I wrong? 3 series xdrive28i is 51.3/48.7 for reference, and the xdrive35i is 52.2/47.8.
That's a good question. I doubt if I could recognize a 1.5% difference (~ 40 lbs) in weight distribution without being confounded by steering rack, tire/size, and suspension component differences. If someone's butt dyno is that highly tuned, then my hat is off to them.

I know I CAN feel the 1 second difference in 0-60, and the 60-80 difference!
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      10-22-2012, 02:18 PM   #11
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Quote:
Originally Posted by Bill B. View Post
I know I CAN feel the 1 second difference in 0-60, and the 60-80 difference!
On a track, of course - we wouldn't think you were speeding
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      10-23-2012, 09:28 AM   #12
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On a track, of course - we wouldn't think you were speeding
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      10-23-2012, 10:13 AM   #13
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Speaking of tracks (and blatantly hijacking a thread) - I've heard that some tracks will allow the X1 and X6 where they won't allow the X3/X5. Anyone have any experience?

I'd sure love to take my X1 to a track day at Lime Rock, just to learn how to drive it better.
(Note that this doesn't mean I think X1 M-sports is in any way M-class, just that unless I drive it like an idiot, it probably won't flip over or burn out the brakes, and I'll be a little better at driving it at the end of the day.)

Last edited by Grovsnus; 10-23-2012 at 02:50 PM.
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