[Nahlem]

Well if we are talking range, When it comes to my i3s during summer time if i am driving "normally" i have achieved at most 280 km in one charge when the guess o meter shows 300 km. And that is with about second setting on the fan and 19c in the car. Sens you Pre cool/pre heat your cabin when connected to the wall connector the heat/cold is rarely a problem.

Then comes winter the car drops to 250-240 km in one charge keeping the cabin at 21c inside again also Pre heating the cabin witch is one of those things you should learn to remember to do before using the car sens then the car have to use a lot less energy to heat up / cool down the car.

So i am guessing with this car if they are claiming 440 km it will probably drop to 390-400 km during winter if keeping 21c in the cabin, But to keep the heat in the car as much as possible BMW should probably heat isolate the car as much as possible as with when building a new home/house the isolation the more you put in the walls the more it keep the heat in the house and the more it will keep the heat outside of the house during summer.

But then again comes that dreaded equations that tells you the more weight you put in to a car the more energy is needed to move that object so you can't put to much weight either in to the car. Sens the car will probably weight a lot.

It is a tricky equation for BMW to solve.