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      07-03-2013, 01:22 PM   #105
Matski
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Quote:
Originally Posted by bimmerjph View Post
Yes, 300lbs (135kg) is no small feat, but one needs to look at the competition's weight as well. Assuming the next 750Li X-drive is 300lbs lighter as well, then it is only a whopping 130lbs (60kg) lighter than the comparable A8L. Thats not really much of an advantage. And the 750Li will actually be 215lbs (100kg) heavier than the Jaguar XJ Supersport. So the carbon fiber 7er won't even be lighter than an aluminum Jag.
Not sure about that.

I think I might have got the wrong weight for the 5-er earlier, but I did't think the Jags were that light.. so I decided to do the numbers:

From BMW.com (EU weight inc all fluids and 75kg driver and cargo):
base 5-er (520d as SCOTT mention) = 1695kg
therefore base G11 7-er (730i) = 1695kg
base F01 (730i) = 1840kg
therefore a weight saving of 145kg

If we apply that to the F01 750i (2015kg) as well, that would give a G11 750i weight 1870kg

From Jaguar.com (Kerb weights excl. 75kg driver and cargo)
XJ 3l petrol s/c = 1755kg
XJ 5l pertol s/c (510PS) = 1870kg

If we add in the 75kg Jaguar don't seem to include for driver and cargo in their figures (I can't find anywhere on Jags website what they include or don't include so I've taken the definition of kerb weight form Wiki)

XJ 3l petrol s/c = 1830kg
XJ 5l pertol s/c (510PS) = 1945kg

So,
The 730i would be 1695kg vs. 1830kg for the Jag 3.0L (BMW is 135kg lighter)
The 750i would be 1870kg vs. 1945kg for the Jag 5.0L (BMW is 75kg lighter)

I've not bother with LWB versions or 4 wheel drive to keep it simple.

Please feel free to point out any errors if I've made them, but I've just gone from what SCOTT said about base 7-er equalling 520d, the manufacturers websites, and the wiki definition of kerb weight.

If I am correct, then I would say again, it's quite impressive for a car that will be bigger and have more gizmos.

And, at the end of the day, these cars are heavy for a reason, they're big and they're packed full of luxury, probably not bought for driving dynamics, so I'm more interested to know what the G? generation 3 er might weigh!

edit: Yes, thinking about it.. BMW are bound to introduce something like a 728i woth the 4 pot Turbo in it.

Since the most similar cars I can think of that have engines of the same type are the 530d and 730d... to work back to a 728i I did this:

The F10 528i is 85kg lighter than the F10 530d.. so if a theoretical F01 728i was also 85kg lighter than the F01 730d (1915kg), it's base weight would be 1830kg.. only 10kg lighter than the F01 730i is already... so even IF the entry level 7-er SCOTT was talking about was actually a 4 pot 728i, the weight saving from the engine alone would only be 10kg... meaning that the vast majority of weight loss still came from the chassis, not just downsizing the engine form 6 to 4...

... again I could be wrong!

Last edited by Matski; 07-03-2013 at 02:01 PM..
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