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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > X drive vs. non X drive, which E90 to buy?



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      11-01-2016, 04:39 PM   #1
naylon
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X drive vs. non X drive, which E90 to buy?

About to purchase an E90

Car # 1: 330xd. 43.000 miles. 2007 model year. Full time AWD

Car # 2: 320xd. 31.000 miles. 2011 model year. X Drive

Car # 1 allures due to bigger engine.

How is the X drive in snow on steep hills? Coming from E46 330xi, it performed well on snowy hills.

Does the X Drive react quick enough on steep hills?
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      11-01-2016, 09:20 PM   #2
floydarogers
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Quote:
Originally Posted by naylon View Post
About to purchase an E90

Car # 1: 330xd. 43.000 miles. 2007 model year. Full time AWD

Car # 2: 320xd. 31.000 miles. 2011 model year. X Drive

Car # 1 allures due to bigger engine.

How is the X drive in snow on steep hills? Coming from E46 330xi, it performed well on snowy hills.

Does the X Drive react quick enough on steep hills?
Both cars are xDrive - all E9x cars switched from the older fixed-torque transfer case that the E46 had. AWD == xDrive (probably the dealer doesn't know that.)

xDrive is a bit better than the older fixed-split, since it can put more torque to the front if necessary.
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      11-01-2016, 09:47 PM   #3
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Same system, BMW just changed the name for marketing purposes.
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      11-02-2016, 04:40 AM   #4
naylon
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Do you mean 2007 model is not permanent all wheel drive?

I though 2007 is full time AWD.
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      11-02-2016, 10:15 AM   #5
hassmaschine
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Quote:
Originally Posted by VTECaddict View Post
Same system, BMW just changed the name for marketing purposes.
it's not the same at all. For one, the E46 transfercase was an open differential - the only way it could "transfer" torque from a slipping wheel to the wheels that had grip was to fake it by braking the slipping wheels. It works ok, but not really great for performance (much like the E9x's E-LSD overheats the rear brakes when used heavily). Also, as stated above, the E46 has a fixed torque split. They had a reputation for eating front CV shafts as well.
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      11-02-2016, 10:16 AM   #6
hassmaschine
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Quote:
Originally Posted by naylon View Post
Do you mean 2007 model is not permanent all wheel drive?

I though 2007 is full time AWD.
2007 and 2011 are the same system.

I think the confusion here is the E46 vs the E90 systems
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      11-02-2016, 09:44 PM   #7
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Quote:
Originally Posted by hassmaschine View Post
it's not the same at all. For one, the E46 transfercase was an open differential - the only way it could "transfer" torque from a slipping wheel to the wheels that had grip was to fake it by braking the slipping wheels. It works ok, but not really great for performance (much like the E9x's E-LSD overheats the rear brakes when used heavily). Also, as stated above, the E46 has a fixed torque split. They had a reputation for eating front CV shafts as well.
He's comparing 2007 xi vs 2011 xDrive. Both E90. Same system. Marketing name change.
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      11-06-2016, 01:44 AM   #8
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+1

The AWD system is "x-drive" for all E90's, but up to some year the car models with x-drive had xi badge at the model name. After that certain year they dropped x letter from the model name, and started adding an "x-drive" badge on the car to indicate it has X-drive (AWD).
To me it looked like an effort to duplicate the "Quattro" badges on the Audi's.
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      11-14-2016, 10:48 AM   #9
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xdrive is really fantastic, its proactive and not reactive like most systems out there. Turn on dynamic traction control and you'll have a blast in the winter time.
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