07-24-2017, 07:40 AM | #1 |
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640XD - Record in low fuel consumption?
Hello guys!
I went for a ride this Friday and decided to try how low I could get in consumption. My car is a 640D X-drive. Here are my numbers: After 220km I could fuel up with 9,90 Liters of fuel = 4.5l/100 km or 52,27 mpg! Is this a record or can anybody challenge me According to the bord computer consumption was 4.3l/100km which is less than 5% wrong so it should also be more than ok... Amazing car! |
07-24-2017, 10:37 AM | #3 |
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That engine you have is fantastic, had the same in my 535 wagon. Best I got was 48mpg. I was debating to do a ecu flash to get 380hp/700nm. Never got to it before I switched to a 6’er
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07-24-2017, 01:49 PM | #5 |
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The 4.4liter petrol (n63tu) is nice, the torque delivery is actually very similar to the 3liter diesel at low rpm. Most of time I’m driving in comfort+, and at this setting the rpm stays low. For my average type of driving the diesel was at 32mpg while the petrol is 22mpg. Not bad for a 450hp v8, but obviously a bit behind the diesel. I don’t drive much so the gas budget doesn’t bother me, so yeah I take the petrol over the diesel, sorry. The 3liter diesel is a very good engine, so if the brand new diesel (they have released a new engine?) is better it must be absolutely superb.
Only wish the petrol had a bit more exhaust rumble Have investigated in replacing the mufflers, but think it’s a lot of money to spend on replace a perfectly good part. |
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07-25-2017, 05:22 AM | #7 |
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Drives: M135i, becoming an X3!
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I am, but can’t get them! My car is almost brand new (only got 2400 miles on it) and the best I’ve had is 43 mpg. Got a long drive tonight, so I’ll try and beat it!
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07-25-2017, 05:24 AM | #8 |
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Drives: M135i, becoming an X3!
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I notice I get late 30s mpg around town, and I can get 44mpg on a long drive. Last time I saw 50mpg was my F30 330D!
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07-25-2017, 05:26 PM | #10 |
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Drives: M135i, becoming an X3!
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Ok, 140 miles of mixed motorway and back roads. Computer says 47mpg and average of 56mph. So, that’s 225km, at an average of 90kph, using just over 5L/100km. Still, not bad for a big diesel, and I didn’t buy it to rival a Prius. Nice to know it can still do reasonable figures when needed. And I could have driven at 56mph, rather than 70mph. I reckon that would be the MPG sweet spot.
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09-29-2017, 07:50 AM | #13 |
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my best in my 2015 640 is 47/48 MPG. I then got bored and decided to sit at 75 it only fell to 44 MPG.
My weekly average is between 34-36 mpg sitting depending on route between 30-50 mph, going the other way more like 75 mph all the way. |
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