x35i weight: 3891 lbs
x28i weight: 3726 lbs
s28i weight: 3527 lbs
Power: 300hp/300ft/lbs
Power: 240hp/260ft/lbs
P/Wx2240=
Power to Weight: 172hp (x35i)
Power to Weight: 144hp (x28i)
Power to Weight: 152hp (s28)
Final Gear Ratio 35i: 3:64
Final Gear Ratio 28i: 3:15
1/4 Estimate: (just calculated with weight and power only)
14.4 (x35i)
15.3 (x28i)
15.0 (s28i)
So: x35i is .6 seconds faster than the s28i and .9 faster than x28i.
0-60 (BMWUSA)
5.3 (x35i)
6.3 (x28i)
6.2 (s28i)
So: x35i is 1 second faster than x28i, and .9 faster than the s28i.
Are you really going to notice that?
It's not always about power; weight, gear ratios, tire size (wheel weights), etc also affect how the car will perform.
Last edited by mabrahams; 08-30-2012 at 08:04 AM..
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