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10-09-2008, 09:38 AM | #1 |
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HUGE difference in economy around town v long distances
My previous car was a very slow, 1.2 petrol Renault Clio and the economy that managed was about 30mpg in town and 37-38 on long trips. All figures are UK gallons, so a bit different to US measurements.
Anywho my new 123d has been in town only for the 2 weeks I've owned it and I get around 30mpg again which was worrying me as it's significantly lower than I anticipated but I have now done a 200 mile motorway journey and I got 49.5mpg, driving around 80mph real speed most of the way, much more impressive! Anywho should I be surprised that it varies quite so much? For those of you curious in general figures, using the display that tells you current mpg: 70mph in 6th - 65mpg 80mph in 6th - 60mpg Tim
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10-09-2008, 10:03 AM | #2 |
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I'm in the middle of an economy run at the moment. Trying to hyper-mile (drive as absolutely efficiently as possible) for a whole tank of diesel to see how close I can get to BMW's claims. Hard to say at this point how it will go but I was quite disappointed with the economy to date. I've only had the car for 3 weeks but I've done 2600kms and it is averaging 7.44 litres/100 kms (37.97mpg UK or 31.61mpg US).
I mostly drive in town with a short motorway stretch on my way to work. Traffic lights are killers for fuel economy Will be very interested to see what I manage to get out of this VERY anally-retentively driven tank. You can see my figures here: http://spreadsheets.google.com/ccc?k...wewyd_HNDcvCBw
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10-09-2008, 10:45 AM | #3 |
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So your new car with 75% greater displacement, forced induction, 50% more weight and more than double the power, driven at an undoubtedly faster pace - manages the same city mileage as your old car, yet you are not satisfied?
:iono:
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10-09-2008, 11:04 AM | #4 | |
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Quote:
Nah I was merely perlexed why it's gone from 30/38 to 30/50, rather than say 35/45, whatever the technical reason behind that actually is. For interest, a much much faster pace 0-30 in what 3.1 they say I think, stupid speed limits. Tim
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10-09-2008, 12:14 PM | #5 |
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it's pretty simple actually, It takes a lot more energy to get the car moving from a stop, then to keep it moving when it's already going. My m3 is the same, I get 15-20 mpg around town and then 28-30 on the highway, so you should be very happy with the results
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10-09-2008, 12:17 PM | #6 |
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That makes sense, thanks
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