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01-27-2013, 09:59 AM | #45 |
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As far as I know, Road & Track hasn't been adjusting their recorded acceleration times for weather conditions, I assume because they've been testing in conditions that don't tend to vary much over the seasons - in coastal southern California.
Seems to me they've moved (or are moving), so we'll see what they do in the future. Bruce |
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01-27-2013, 10:19 AM | #46 |
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Of course.
My reason for posting C&D's European test data was to show that R&T numbers that may be seen as "suspect"/questionable are not a one off as far as the M3 numbers are concerned; even relative the C63 AMG. However, it is always possible that C&D's data could be suspected the same as R&T's European test data, but if C&D gets a pass, with very close numbers from a second source, the case against R&T's numbers is pretty thin.
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01-27-2013, 10:21 AM | #47 |
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And once agan, I'm surprised by the relative weights of the cars. The M3 is lighter than a lot of us make it out to be. The C63 is a real porker, but has tremendous power. And the RS4 is lighter than I would have thought, especially compared to the C63.
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01-27-2013, 10:38 AM | #48 |
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How is their weight measured so much lighter than BMW's official curb weight? They measure with a full tank, don't they?
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01-27-2013, 11:58 AM | #49 |
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Conclusion appears to be if one gets a good launch, the MT maybe slightly slower/roughly the same as the DCT up to about 100-110mph. DCT likely to result in more consistency on track/dragstrip and can shift more quickly than any human, but doesn't mean that the MT under good launch conditions an get pretty close. There is a small weight penalty w/ the DCT (which is why some of these initial M3 test showed lower curb weights) that is more than made up for the quicker shifts.
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01-27-2013, 08:12 PM | #50 |
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If you are going to use the best 6MT times, you should compare to the best M-DCT times... straight from Car & Driver. 3.9 0-to-60, and 12.4 @ 114mph for a 2011 M3 w/ M-DCT during a head-to-head comparo with the RS5 and CTS-V.
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01-27-2013, 08:48 PM | #51 | |
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Quote:
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01-27-2013, 10:00 PM | #52 | |
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Quote:
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01-28-2013, 09:29 PM | #54 | |
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M3 weight
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Definitions: •US Curb Weight = Weight of Car with standard accessories, full fluids, no driver •EU Weight = Weight of Car with 90% fuel, 68 kg driver, 7 kg cargo •Unladen Weight = Appears to be Curb Weight less 8 kg (can't find definition) •1 US Gallon = 3.8 liters •Weight of 1 US Gallon of Gasoline = 6.35 pounds (2.87 kg) •Weight of 1 liter of Gasoline = 1.67 pounds (0.76 kg) Equations for Weight Conversion: •Curb Weight (metric) = EU1 Weight - 68kg for driver - 7 kg for cargo + (0.1 X Fuel Capacity X 0.76) •EU Weight (metric) = Curb Weight + 68 kg for driver + 7 kg for cargo - (0.1 X Fuel Capacity X 0.76) •1 KG = 2.2 pounds BMW M3 •EU Weight = 1655 kg •Curb Weight (manual) = 1655 kg - 68 kg - 7 kg + (0.1 X 63 liters X 0.76) = 1585 kg = 3,487 lb. •US Unladen weight per MBUSA (manual) = 3,707 lb. Certainly options standard or required here lead to some difference; the rest is up to your conjecture, unless someone has definitive information.
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