10-24-2010, 09:31 PM | #45 |
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This video explains different systems used in Subaru, Toyota, VW , Honda pretty well.
for the heck of it: Last edited by watoowatoo; 10-24-2010 at 09:52 PM.. |
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10-25-2010, 09:13 AM | #49 |
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I've tested both systems (x-drive + quattro) in extreme dry conditions and it's not like the x drive has better gripping power than the quattro... both cars grip and will get you out of real world situations about the same but the major difference I found was:
X-Drive responds MUCH MUCH quicker than quattro does. It also responds more smoothely and thus does a better job at keeping you on the intended path. Example: You enter a ramp with 1ft of snow on it at 30 mph. You lose traction with both cars, but BMW reacts in 0.5 seconds, and Audi reacts in 1 second. That 0.5 second difference is HUGE and very scary when you are facing a metal barrier because even when the system intervenes, it still takes a while for the car to grab a bite at the road. As far as going uphill on a slippery surface and such, again, I think both are equally good given real world situations. The only advantage that x-drive has is that it will react quicker if a wheel slips while going uphill which will keep you moving better and more on the intended path. As far as this video goes: BMW found a flaw in Audi's system and they are making a fool out of them. If Audi finds a flaw in BMW's system, I'm sure they would do the same. It's fair game. Tires and ESP don't have anything to do with this video. Both cars are equally equipped...that's just how the quattro behaves in those situations. It's rare for that to happen, but IT IS a flaw. Period.
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10-25-2010, 09:34 AM | #50 | |
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10-25-2010, 10:24 AM | #51 |
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actually, I am pretty sure that the X-Drive system took after the Honda/Acura developed SH-AWD with Torque Vectoring. I think Torque Vectoring is what makes all the difference....It was first introduced in 2004 on a 2005 Acura RL SH-AWD/Honda Legend...
Check out this Video of the new 2010 MDX against the Q7 and RX... [u2b]http://www.youtube.com/watch?v=YidkaqlW9ns&feature=related [/u2b]
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10-25-2010, 11:49 AM | #52 |
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I would also state that any fwd car is also better than any rwd BMW in snowy conditions. My MINI and wifes Volvo V70 handle winter far better than my 3 series ever did.
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10-25-2010, 12:45 PM | #53 |
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10-25-2010, 01:10 PM | #54 |
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Drove my 335 xDrive coupe through the blizzard over presidents day in DC to see the Pens play the Caps. I passed a Subaru that was stuck at one point. The car was unstopable. All I had on were all season tires. xDrive is ridiculous.
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10-25-2010, 01:55 PM | #56 | |
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All I am saying is bogus fixed test by BMW. Says, absolutely nothing. I personally believe x-drive superiority if any really exists in the real world, is marginal if anything. Enternaing video though.
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10-25-2010, 01:59 PM | #57 | |
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Regarding the video, it's funny that they didn't show the BMW going up the hill even though in the description it says that the xDrive was a part of the comparison. Every video that I see (from BMW themselves) showcasing the xDrive, they show the car going up a hill like in this video, so maybe that's a strength in the xDrive system |
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10-25-2010, 02:03 PM | #58 |
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Nothing stops an audi, i have a 2000 A6 and its NEVER gotten stuck, just last year i pulled out two cars from a ditch during our blizzard. Test like the one above are just a marketing gimmics, real world test is what counts, and im pretty sure most of us would agree with that.
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10-25-2010, 02:16 PM | #59 | |
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10-25-2010, 05:24 PM | #61 | |
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IMO xDrive would perform better in this situation since the situation is very similar to the roller test seen in the previous videos. So, the controlled situation from "roller test" can be also found in real life situations. Not often but still. |
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10-25-2010, 07:34 PM | #62 |
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X6M, just like X6, has a rear differential system called "Dynamic Performance Control", which is NOT purely mechanical (unlike inferior Torsen). It, just like regular xDrive system in vehicles like X3 and X5, is being controlled by car's computer, which uses various electronic sensors and electric motor to control the mechanical clutches. http://www.caranddriver.com/features...ling-tech_dept |
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10-25-2010, 09:15 PM | #63 | |
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With the addition of DPC, the X5M/X6M can just better apply torque to the rear wheels than an open differential via individual wheel braking to transfer torque from one side to the other. As it seems, the xDrive system is probably a better system. Not saying the torsen Quattro is bad though. Just a little outdated now. But it may still suffice for most uses (seeing how many replies on this thread indicates good experience with it). However, you must not dis-credit the xDrive system as I have yet to see a negative comment about BMW's xDrive system on forums and users. Or looking at it from another perspective. xDrive scores arbitrary 95% and Quattro scores 90% in real world situations. Are both system good? Are both systems able to meet general needs? Yes. Its just in unfortunate certain situations where traction is not ideal at one wheel axis, the BMW WILL perform better and quicker than Quattro. Last edited by tctic; 10-25-2010 at 09:22 PM.. |
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10-26-2010, 01:50 AM | #66 |
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anyway...back to topic...
very impressed with BMW Xdrive.....cool technology!!
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