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View Full Version : Spreadsheet showing gearing of X3 compared





rumatt
11-17-2003, 10:32 PM
to other BMW's.

I noticed that the X3 2.5 has a 6-speed (manual) but the final drive ratio is 3.91 I made a spreadsheet to look figure out the speeds at various RPMs, and it looks like the X3 compares favorably against the wagon due to the 6-speed (and larger circumference tires).

Of course, this assumes my math is correct. The spreadsheet is here if you want to download it: <a href="http://<a href="http://**********.com/forums/showthread.php?t=45669">http://**********.com/forums/showthread.php?t=45669</a>"><a href="http://**********.com/forums/showthread.php?t=45669">http://**********.com/forums/showthread.php?t=45669</a></a>

325i 330i 325xiT 325iT X3 2.5 X3 3.0
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Final drive ratio 3.15 2.93 3.23 3.46 3.91 3.64
Highest gear 1 0.85 1 1 0.85 0.85
Tire circum.(in.) 78.16 78.16 78.16 78.16 85.38 85.38

RPM Miles/Hour
2500 58.7 74.3 57.2 53.4 60.8 65.3
3000 70.4 89.1 68.7 64.1 72.9 78.4
3500 82.2 104.0 80.2 74.8 85.1 91.4
4000 93.9 118.8 91.6 85.5 97.3 104.5
4500 105.7 133.7 103.1 96.2 109.4 117.5
5000 117.4 148.5 114.5 106.9 121.6 130.6
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rumatt
11-17-2003, 10:34 PM
a better view:


<a href="http://**********.com/forums/showthread.php?t=45669">http://**********.com/forums/showthread.php?t=45669</a>


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