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Posted by Bob ///M3 on January 30, 2001 at 17:53:02:

In Reply to: Saddam has 95,96 questions posted by Saddam Hussein on January 30, 2001 at 16:16:52:

The following is "ground speed" in mph versus "engine speed" in RPM based on the following information for the '96 thru '99 M3. Note that engine speeds for 80mph and 100mph for the '95 M3 with a 3.15 Final Drive Gear are included for reference:

Transmission gearing:

1st Gear - 4.20
2nd Gear - 2.49
3rd Gear - 1.66
4th Gear - 1.24
5th Gear - 1.00
6th Gear - 0.83 *

* Note: 6th Gear was calculated for Euro versions. The Euro version M3 has slightly different transmission gears in 1st (4.23), 2nd (2.51) and 3rd (1.67) gears which makes less than 1 mph difference compared to the U.S. version M3.


Final Drive Gearing:

3:23 to 1 **

** Note: The '95 model M3 has a 3:15 to 1 Final Gear Ratio. Depending on rear tire diameter size, the calculations will be different. Note that engine speeds for 80mph and 100mph for the '95 M3 with a 3.15 Final Drive Gear are included for reference


Rear (Drive) Tire Diameter:

245/40 X 17" (24.72" Diameter)


Figures will be "RPM" in 500 rpm increments followed by "Speed" beginning with 1st gear and so on.

1st Gear:

1,000 rpm - 5 mph
1,500 rpm - 8 mph
2,000 rpm - 11 mph
2,500 rpm - 14 mph
3,000 rpm - 16 mph
3,500 rpm - 19 mph
4,000 rpm - 22 mph
4,500 rpm - 24 mph
5,000 rpm - 27 mph
5,500 rpm - 30 mph
6,000 rpm - 33 mph
6,500 rpm - 35 mph
7,000 rpm - 38 mph
7,500 rpm - 41 mph
8,000 rpm - 43 mph


2nd Gear:

1,000 rpm - 9 mph
1,500 rpm - 14 mph
2,000 rpm - 18 mph
2,500 rpm - 23 mph
3,000 rpm - 27 mph
3,500 rpm - 32 mph
4,000 rpm - 37 mph
4,500 rpm - 41 mph
5,000 rpm - 46 mph
5.500 rpm - 50 mph
6,000 rpm - 55 mph
6,500 rpm - 59 mph
7,000 rpm - 64 mph
7,500 rpm - 69 mph
8,000 rpm - 73 mph


3rd Gear:

1,000 rpm - 14 mph
1.500 rpm - 21 mph
2,000 rpm - 27 mph
2,500 rpm - 34 mph
3,000 rpm - 41 mph
3,500 rpm - 48 mph
4,000 rpm - 55 mph
4,500 rpm - 62 mph
5,000 rpm - 69 mph
5,500 rpm - 75 mph
5,686 rpm - 80 mph('95)
6,000 rpm - 82 mph
6,500 rpm - 89 mph
7,000 rpm - 96 mph
7,107 rpm - 100 mph('95)
7,500 rpm - 103 mph
8,000 rpm - 110 mph


4th Gear:

1,000 rpm - 18 mph
1,500 rpm - 28 mph
2,000 rpm - 37 mph
2,500 rpm - 46 mph
3,000 rpm - 55 mph
3,500 rpm - 64 mph
4,000 rpm - 73 mph
4,247 rpm - 80 mph('95)
4,500 rpm - 83 mph
5,000 rpm - 92 mph
5,309 rpm - 100 mph('95)
5,500 rpm - 101 mph
6,000 rpm - 110 mph
6,500 rpm - 119 mph
7,000 rpm - 129 mph
7,500 rpm - 138 mph
8,000 rpm - 147 mph


5th Gear:

1,000 rpm - 23 mph
1,500 rpm - 34 mph
2,000 rpm - 46 mph
2,500 rpm - 57 mph
3,000 rpm - 68 mph
3,425 rpm - 80 mph('95)
3,500 rpm - 80 mph
4,000 rpm - 91 mph
4,282 rpm - 100 mph('95)
4,500 mph - 101 mph
5,000 rpm - 114 mph
5,500 rpm - 125 mph
6,000 rpm - 137 mph
6,500 rpm - 148 mph
7,000 rpm - 159 mph
7,500 rpm - 171 mph
8,000 rpm - 182 mph


6th Gear *(Euro version)

1,000 rpm - 27 mph
1,500 rpm - 41 mph
2,000 rpm - 55 mph
2,500 rpm - 69 mph
2,843 rpm - 80 mph('95)
3,000 rpm - 82 mph
3,500 rpm - 96 mph
3,557 rpm - 100 mph('95)
4,000 rpm - 110 mph
4,500 rpm - 123 mph
5,000 rpm - 137 mph
5,500 rpm - 151 mph
6,000 rpm - 165 mph
6,500 rpm - 178 mph
7,000 rpm - 192 mph
7,500 rpm - 206 mph
8,000 rpm - 219 mph


Please note I have included data up through 8,000 rpms! This is so anyone who has aftermarket performance software, which increases the rev limiter, will have the necessary information up through and beyond the new limits.

Also of interest, one can determine what the rpm will be when downshifting into a lower gear so as not to redline the engine and cause damage. This information can also be used to determine at what rpm the engine speed was "if" there happened to be a mis-shift on a downshift if you knew what speed you were traveling.

It is assumed that everyone knows our M3s should not be operated at the upper most limits of the rpms which I have listed and it is also assumed that everyone knows our M3s will not approach the upper limits of the ground speeds (mph) which I have listed due to aerodynamic drag!

Lastly, if you happen to have a tire and wheel combination which does not have a 24.72" diameter the above calculations will be different.

Bob ///M3



In as much as the diff ratios are so different beetween both cars
I'm interested in the rev speed at 80mph beetween a 95 car and the 96+ car
I suppose most of you laugh at 80 so try 100mph if it's easier for you
If there are europeans or australians readin I'd also be interested in the 6th gear rev speed and for an SMG
If I do not receive a satisfactory answer I will have everyone flogged.





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