Has anyone noticed that the fuel economy rating in the city for the E90 is better for the Steptronic in city driving? It's only 1mpg better, but it's better! I was surprised to see this. For highway driving it's reversed and the manual is better.
PS - I did search on fuel economy, auto and manual and only found a few threads. The most applicable one which was closed. I also noted that there's a current thread where someone is trying to decide between buying an auto and a manual but that thread has evolved into a lot of posters insulting each other, so I didn't want to hijack that thread and post this at the end.
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| Reply » Fuel economy ratings auto vs manual |
I have the exact same question actually. The gear ratios on the automatic are different (it has "taller" gears IIRC) which I imagine is one factor.
The highway mileage is certainly excellent, I got 7.2L/100kms on a pure highway trip on the weekend, very impressive. Manual transmission.
-Tim
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| Reply » Fuel economy ratings auto vs manual |
Hmmm I never looked at the gear ratios too closely and didn't notice that. The automatics do have a shorter rear differential, so I guess you'd have to do some math to figure out if the gears were shorter or taller.
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| Reply » Fuel economy ratings auto vs manual |
It doesn't make sense to me either, and it may be one of the issues that the EPA will address when it revises its testing methods.
The only thing I can figure is that the EPA assumes higher shifts to the manual.
Quote: Has anyone noticed that the fuel economy rating in the city for the E90 is better for the Steptronic in city driving? It's only 1mpg better, but it's better! I was surprised to see this. For highway driving it's reversed and the manual is better.
PS - I did search on fuel economy, auto and manual and only found a few threads. The most applicable one which was closed. I also noted that there's a current thread where someone is trying to decide between buying an auto and a manual but that thread has evolved into a lot of posters insulting each other, so I didn't want to hijack that thread and post this at the end. |
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Fuel economy ratings auto vs manual