[piyush128k]

I just downloaded this app on my android to measure the sav 0 to 60 and 0 to 100 timings. App is "Drag timer". 0 to 60 was really varying every time. There are many factors to your timings like:
1) The wind direction
2) The road like straight road or does it have a curve or slight uphill or so
3) Octane level of gas
4) Type of tires and wheel size
5) Weight of the car like an included 3rd row to add on
6) Sea level
7) Mode of the car like comfort or sports plus or manual or automatic
8) The app or device that times the speed.

The first time i timed my X5 50i F15 was on a road with slight uphill and I got 7.59 sec for 0 to 60. Puzzled I was. Next time I did it was on a road with slight curve and got 6.65 sec when I realized what was going on.
I went on a flat straight road with not much wind and I got 5.1 with launch control. WHAT!
I immediately stop on the same road and continued to do the same and got 5.73 sec. BMW says it is 4.7 and some other sites have reported 4.5. BMW X5M is 4 sec for 0 to 60. I did not find launch control amusing at all just that it feels as if the front tires / suspension lift up a little and yes maybe a little more drama to it but nothing that pushes the adrenalin.
Not to forget the Turbo lag and BMW limits the top speed and for this F15 50i it is 132 mph.

Maybe I should buy a speed testing device rather than the app. Any suggestions on the device to buy?