[Boss330]

Originally Posted by basscadet

I am pretty sure we have already debunked the 3300lb myth. Based on weight-loss %'s straight from BMW, I believe the popular current story is that the weight of the car, with no driver but with all fluids, is between 3450 and 3550 lbs.

(correct me if I am wrong, guys)

Originally Posted by Sapper_M3

I'll start: When was this debunked...?

EDIT: And I'll add that a figure of 3450-3550 lbs makes absolutely NO SENSE in line with BMW's quoted weight savings. You understand that the 3704 lb figure for the E92 M3 was EU weight correct? Do the math: BMW's listed weight for the E92 M3 was 3704 lbs. EU weight is calculated as the following: Weight of Car with 90% fuel, 68 kg driver, 7 kg cargo. Subtracting the 75 kilograms for driver and cargo, you're already down to 3539 lbs. When you add back the remaining 10% of fuel from the 63 liter tank, you're only up to 3550 lbs -- and that's CURB WEIGHT (all fluids, including 100% gas, no driver or cargo). You're claiming we should anticipate that the new M4 might (you gave a range, but that range extends all the way back to 3550 lbs) have the same exact curb weight as the E92 M3...?

Originally Posted by Sapper_M3

And to add to it, I'll maintain--as always--that I've never been optimistic about these weight savings, but BMW (and M specifically) is fanning the flames with this specific weight figure.

You're talking about weight loss percentages "straight from BMW," but Albert Bierman himself is the source of the 3306 lb speculation. I won't do the math for you, but read on for the "1500 kg" figure offered.

http://f80.bimmerpost.com/forums/sho...d.php?t=915648

Now, in Biermann's defense, he never unequivocally states that they ACHIEVED the sub-1500 kg goal, but he's the one putting that number out there, and he even uses it as the rationale for cost-cutting in other areas ("we saved money to spend on cutting weight more aggressively" followed immediately by his unsolicited offering of a 1500 kg weight figure). If the car is 150 lbs heavier than this claim, there will be a lot of unhappy folks, and BMW/M will only have themselves to blame. Car mags aren't coming up with these numbers on their own.

Originally Posted by CanAutM3

I think the most reliable number we can use is the "80kg less than a similarly equiped E92" quoted by BMW.

Originally Posted by Sapper_M3

...and E92 curb weight of 3550 lbs - 80 kg (176 pounds) still puts us at 3374 curb weight, or listed as EU weight at approximately 3528 lbs (slightly less, as I factored in the 75 kg driver and cargo, but did not account for the 10 percent fuel).

3374 lbs in the lightest trim possible wouldn't be a bad figure, but--again--Albert Biermann, the HEAD of development for BMW M, is the guy throwing out the "less than 1500 kg" figure. If they don't intend on delivering a product that at least approaches this, they should expect people to be miffed.

In the European E9x M3 brochure the unladen weight is stated as 1655kg (1675kg with DCT), or 3645lbs and 3689lbs respectively in the old School way of measuring things That weight includes 90% fuel and 68+7kg (75kg) driver and cargo plus all fluids.

As has been stated above, BMW has said that a similarily equipped F8x M will weigh 80kg less than a comparable E9x M3. The E9x M3 has also been quoted as having a curb weight of 1580kg (3480lbs), which doesn't include the driver (1655-75=1580kg).

From this we can deduct that the lightest F8x will weigh 1500kg (or a bit less) WITHOUT driver, but WITH 90% fuel and all fluids.

So, yes the standard F8x ready to drive, but without driver, will most likely weigh around 1500kg or 3303lbs.

Add the driver and we are at 1575kg or 3469lbs.