Last post on May 09, 2013 at 9:32 AM
You are in the Sedans
What is this discussion about?
BMW 3 Series, Infiniti G37, Acura TL, Lexus IS 350, Mercedes-Benz C-Class, Cadillac CTS, Volvo S60, Audi A4, Acura TSX, Car Comparisons, Sedan
#14912 of 16087 #2 Re: BMW Transmissions - Best Choice?? [habitat1]
Sep 18, 2012 (7:07 am)
The ‘Best Choice’ for me [ YMMV ] is #2 - the 7-speed DCT in the BMW 335iS I currently drive.
I have driven several BMW 6-speed Steptronics and one new 8-speed Step [ in a 2012 535i ] and except in very slow & stop traffic [ 0 – 20 mph ] this transmission is a paragon of quick & precise gearchanges [ up & down ] with very well managed driveline shock.
No manual trans. for me anymore . . .
#14913 of 16087 Re: #2 Re: BMW Transmissions - Best Choice?? [rayainsw]
Sep 18, 2012 (7:58 am)
this transmission is a paragon of quick & precise gearchanges [ up & down ] with very well managed driveline shock.
Fortunately, I can still say the same thing about my right hand and left foot. But that's a debate for another forum.
#14914 of 16087 Re: BMW Transmissions - Best Choice?? [habitat1]
Sep 18, 2012 (8:06 am)
I'm sure it has to do with the EPA more than anything else, but the benefits of the 8 spd steptronic are three fold. One it helps with the EPA figure and two it keeps the engine in the torque band and three more people buy BMW with Auto's then manuals. With that being said, the 8 spd works will with the turbo 4, I haven't driven the turbo 6 with the 8 spd, but I would assume it would be a nice fit too.
In regards to the 7 spd manual in the 911, I'm sure BMW will be moving to this soon to get their manual cars into line with the EPA too.
I like the newer DCT a lot, very quick shifting up and down, and no lag when shifted
#14915 of 16087 Re: It finally happened [sweendogy]
Sep 18, 2012 (8:12 am)
Sweeny the issue Infiniti has, it is trying to one up BMW, and to do that it is doing it with more HP, and this comes at a cost. Infiniti for some reason just can not get the FM platform to handle as well as the 3 series, it has all the right box's checked to be a better car... Infiniti will have to do something to get in line with the EPA...
I have a question some of you experts, does Infiniti fall under Nissan when it comes to the EPA? I would suspect if it does, then Infiniti will not worry about the MPG of the G or M for a while.
#14916 of 16087 Re: You know what? [m6user]
Sep 18, 2012 (8:17 am)
Interesting I swear the window sticker said the 4 cyl had the 6 spd. Either way just too small, and I was told that the X1 might take over for the 3 series wagon, I hope not...
#14917 of 16087 Re: #2 Re: BMW Transmissions - Best Choice?? [habitat1]
Sep 18, 2012 (8:23 am)
I highly doubt you can shift your 911 faster then a DCT.
In regards to your X5d, the torque band if so flat that having a 8 spd auto would be very beneficial in aiding more MPG without sacrificing performance.
#14918 of 16087 Re: BMW Transmissions - Best Choice?? [habitat1]
Sep 18, 2012 (9:00 am)
Should have clarified that in my "rankings":
#1 6-speed manual
#2 7-speed DCT (M series, $2,900 option)
#3 7-speed DCT (non-M, $450 option)
#4 8-speed automatic
Let's not confuse high end DCTs in the M3 or Porsche's PDK in the 911 with the DCT used by BMW in the standard 3/5 series. Very different in terms of design, performance - and cost. $2,900 for the BMW, $4,000 for the PDK, $10,000 for Ferrari. You aren't going to get that level of engineering or construction by checking a $450 box with BMW or VW.
As for my manual shifting speed vs. a DCT. That's not the issue. I'll give up a tenth or two in the 0-60 (one shift) drag race in order to get the direct control and the engagement factor of driving the car. I understand that's a personal choice. I'm no Bubba Watson, but I still play golf from the tips of a 7,100 yard course because I want the full effect. I know I could score a few strokes better from the white tee box, but it wouldn't be as satisfying. It makes me laugh that some of my playing partners will spend $500 on a driver and then moan like babies when I suggest we play the black tees rather than the blues or whites.
Regarding the X5d, the flat torque curve is precisely why you don't need as many gears. Every gear change results in energy loss. Small, but a loss nonetheless. By the time you get to highway speeds, the final gear ratio is all that matters, not how many shifts it took to get there. Around town, an extra gear or two might help, but a 5,300 pound curb weight is still the overriding factor.
#14919 of 16087 #3 Re: BMW Transmissions - Best Choice?? [habitat1]
Sep 18, 2012 (9:03 am)
OK - my choice is now #3.
All other comments still apply.
Happy with the performance - and the cost....
#14920 of 16087 Re: BMW Transmissions - Best Choice?? [habitat1]
Sep 18, 2012 (4:04 pm)
I hear what you are saying as before I was the one who would never get a car that didn't have an auto, but not too sure if it age and or wisdom or both, but give me a good DCT over a manual...
So in theory a CVT would be the best transmission since it does not have to shift so no energy is lost. Even though we know that Nissan is working overtime to perfect it, they have come a long way with the new Generation Altima and Infiniti JX, but to see a CVT in a true performance car, Nissan has it's work cut out for themselves.
#14921 of 16087 Re: It finally happened [flightnurse]
Sep 18, 2012 (5:51 pm)
I agree Infiniti is doing it with HP- but it's also doing it with price- real dollars that can pay for a boatload of gas and oil changes.