MINI2 - MINI Forum - View Single Post - R56 MCS Auto 0-62mph figures????

wayche · Mar 10th, 2007, 02:01 PM

My guess is that has to do with the gear ratios, which are different between the manual and auto boxes. These figs are for the MCS:

Getrag 6sp MT:

Gears I - VI : 3.308 / 2.130 / 1.483 / 1.139 / 0.949 / 0.816
Final Drive: 3.647

Aisin 6sp AT:

Gears I - VI: 4.044 / 2.371 / 1.556 / 1.159 / 0.852 / 0.672
Final Drive: 3.685

Looks like your answer is right there... the autobox has a MUCH taller 1st gear, and the gap gently tapers off in 2nd - 4th. I'm guessing this is what leads to your slower 0-62 time.

As for the 1/4 mile time: The autobox has an ever so slightly longer final drive ratio, and shorter 5th and 6th gears, so I'm guessing that gives it greater legs than the manual once it gets past 4th gear and closer to the 1/4 mile trap. It probably ends up with a higher trap speed as well.

Mar 10th, 2007, 02:01 PM	#18
wayche MINI2 Newbie Join Date: May 2004 Location: Baton Rouge, LA Local Time: 09:09 PM Posts: 14 Offline	My guess is that has to do with the gear ratios, which are different between the manual and auto boxes. These figs are for the MCS: Getrag 6sp MT: Gears I - VI : 3.308 / 2.130 / 1.483 / 1.139 / 0.949 / 0.816 Final Drive: 3.647 Aisin 6sp AT: Gears I - VI: 4.044 / 2.371 / 1.556 / 1.159 / 0.852 / 0.672 Final Drive: 3.685 Looks like your answer is right there... the autobox has a MUCH taller 1st gear, and the gap gently tapers off in 2nd - 4th. I'm guessing this is what leads to your slower 0-62 time. As for the 1/4 mile time: The autobox has an ever so slightly longer final drive ratio, and shorter 5th and 6th gears, so I'm guessing that gives it greater legs than the manual once it gets past 4th gear and closer to the 1/4 mile trap. It probably ends up with a higher trap speed as well.