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2011 Z4 steptronic a lot more quick/crisp than my 09 E90

blubyu2010-08-17 16:13:29 +0000 #1
I'm guessing they aren't the same exact transmission? The Z4 I have as a loaner has a lot quicker and less lag shifts than the steptronic in my 09 335i and that is just on a short sprint up to 55mph. I live close to work and don't like abusing cars that aren't mine but in 2 shifts I much preferred the steptronic in this Z4.
dmz2010-08-17 16:29:23 +0000 #2
They both use the same steptronic tranny. It's probably because the car is lighter and therefore feels more responsive to the throttle and gear changes.
blubyu2010-08-17 17:02:35 +0000 #3
Quote:

Originally Posted by dmz

They both use the same steptronic tranny. It's probably because the car is lighter and therefore feels more responsive to the throttle and gear changes.

I really wouldn't think 300lbs or so difference would cause the transmission characteristics to be that much different, I could be wrong though. This Z4 steptronic definitely has a lot quicker shifts than my 09 335i.
merlinfe2010-08-17 17:32:44 +0000 #4
Why don't you just find a 300lb person and put them in your E90 to see if there is a difference in your car. That way you can rule out the weight as a factor.

I think it just may be a programing thing with the Z4. It is supposed to be "sportier" than the E90 right?
RCS3282010-08-17 16:48:15 +0000 #5
Was it a 30i or 35i? 3.5 has DCT but I am sure that you would know the difference between the two. Possible different transmission software as well.

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