6sp Vs. 5sp - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 03-15-2005, 04:59 PM
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I am having trouble finding data on the difference. Does someone have a link of the ratios of these two compared. I found the 6sp, but not that 5sp. It seem that they say the 6sp gets 30mpg compared to 29mpg for the 5sp, but I don't know if that is correct. If so, why? Is the overdrive a different ratio?

I am looking at two different cars and they are very much the same. One is a 6 and the other a 5.

Thanks for any thoughts.
Curt
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#2 (permalink) Old 03-15-2005, 07:32 PM
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Quote:
Originally posted by h_curtis@Mar 15 2005, 06:59 PM
I am having trouble finding data on the difference. Does someone have a link of the ratios of these two compared. I found the 6sp, but not that 5sp. It seem that they say the 6sp gets 30mpg compared to 29mpg for the 5sp, but I don't know if that is correct. If so, why? Is the overdrive a different ratio?

I am looking at two different cars and they are very much the same. One is a 6 and the other a 5.

Thanks for any thoughts.
Curt
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You need to compare apples to apples. The current 5 speed and 6 speed have ALMOST the same ratios up through 5th, with 5th being 1.00:1 and 6th being an overdrive ratio. But, depending on which car you're looking at, the rear end ratio is different. So if you're comparing a 325i and 330i, the 330i with 6 speed has both the overdrive 6th gear and a lower rear end ratio (and because of the lower rear end, al the other final drive ratios are lower). That 29/30 mpg comparision, I believe is a 325i 5 speed with 3.15 rear end vs. a 330i 6 speed with 2.9x rear. The 325ix has a higher rear end ratio; I think the 330ix is the same as the 330i. I don't know about the coupes, nor about pre '04..

David
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#3 (permalink) Old 03-15-2005, 08:36 PM
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what about between the 5sp 330 and the 6sp 330?
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#4 (permalink) Old 03-16-2005, 11:48 PM
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Quote:
Originally posted by mk173@Mar 15 2005, 09:36 PM
what about between the 5sp 330 and the 6sp 330?
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Yes, I should have clarified. I am looking at two 2004 330i's. One with a 5sp and one with a 6.

Thanks,
Curt
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#5 (permalink) Old 03-18-2005, 05:58 PM
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You can download a .pdf sale brochure from bmw and look at all the dat on the transmissions. I thought that in the USA you could not get a 5-speed manual trans in a 330. The "5-speed" would then an automatic. Are coupes and convertibles different?

If you are in Europe I guess you can find just about anything. Maybe download the German language .pdf sales brochure. You will recognize the info on the trans even if you can't read German.

This is what I have gleaned: The 5-speed manual trans is smaller and the whole package is about 90 pounds lighter (including the smaller/lighter differential). I think but am not sure that all that is done because the 325i makes less power than the 330i, the 325i benefits from being 90 pounds lighter, and so the 330i comes standard with the 6-speed trans.

The poster-above's expanation on comapring the trans gear ratios is right on target. And the 6-speed has a .85 overdrive with a 2.93 in the rear end, while the 5-speed has a 3.15 ratio in the rear end. The 325i would be a dog with the 2.93 rear end ratio because it doesn't have much torque.
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#6 (permalink) Old 03-20-2005, 07:24 PM
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Stop talking about the 325...(did not mean to sound rude) the only question was what is the difference between lets say a 2003 330 5 speed stick-shift and a 2005 330 6 speed stick-shift...Is one better than the other in terms of performance?
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#7 (permalink) Old 03-21-2005, 08:23 AM
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Quote:
Originally posted by mk173@Mar 20 2005, 09:24 PM
Stop talking about the 325...(did not mean to sound rude) the only question was what is the difference between lets say a 2003 330 5 speed stick-shift and a 2005 330 6 speed stick-shift...Is one better than the other in terms of performance?
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I admit I am speculating/assuming just a bit here, but I assume the rear end on the 2003 is the same as on the 2005, and that the 5-speed now available in the 325 is the same one (give or take) that was available in the 2003 330. That being the case, I would expect no performance difference between the two transmissions, but better highway gas mileage with the 6-speed.

David
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