RPM when speed at 80 - 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 07-31-2004, 12:21 AM
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Hi! I am new to this forum. It's great!
A dummy question. I just bought my 01' 325i couple days ago... found out that when the speed was around 80 mph, the RPM was 3500 (of course, use the 5th gear). Is this normal? My previous car was '99 Passat turbo. It hits 80 mph with only 3000 RPM, so does my Honda Accord (4-cylinder). Since bimmer has 6 cylinders, I thought the RPM should be lower, let's say, 2500 when the speed hits 80 mph. Please help.
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#2 (permalink) Old 07-31-2004, 12:42 AM
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I'd say that is about right.... If you look at the Honda and the other car... the red line is probably lower.... BMW make mid to high reving engines.... that is natural... I have a 97 M that produces 3k at 70mph. So 3.5k at 80 should be about right.


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#3 (permalink) Old 07-31-2004, 03:30 AM
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Its all got to do with the gearing, not the size of the engine. The passat and accord ahve their gear ratios more spaced out and/or their final drive ratio is taller to give a more relaxed cruise, whereas the BMW is more tighter, to give a more instance response. The 330Ci with 6-speed manual box, its 6th gear is pretty tall, it cruises 80mp/h at 2500rpm.
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