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Discussion Starter · #1 ·
The window sticker says 35.2 kWk/100mi = 270 miles of range.

If the battery is 83.6 or 81.9 usable, then 81.9/35.2*100 = 233 miles.

What am I missing?

As for real life range, it's been in the mid-30s (2-4C) over my 10 days of ownership. Local driving, very short trips, is maybe 200, but trips longer than 10 miles have all been 250-300, Need a lot more time to suss it out, love the car, just trying to do the math. My average usage is 36.3 kWh, but short cold trips and not shy about letting it rip from time to time.
 

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35.2 kWh/100mi seems kinda high. It would have to be around 30.2 to get the 271mi range. What does the sticker say about combined MPGe?

I assume this is an M50. Do you have 20" rims, or 19"? If 20inch, then the range should be more like 227mi (according to the configurator), which is closer to the quoted 35.2 kWh/100mi = 233mi.
 

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You're right, though, there's definitely a disconnect between the combined MPGe (or kWh/100mi) and the stated range, even if you use the more optimistic 83.6kWh battery capacity. For example, the edrive40 with 18" rims is quoted at 109 MPGe, and 301mi range. Using 33.7kWh per gallon equivalent, here is my conversion spreadsheet:
Font Material property Parallel Pattern Number

It would have to get around 120 to 125 MPGe in order to get 301 miles of range.

I suspect they're using the more optimistic highway efficiency for the range calculation, rather than the combined city+highway measured efficiency.
 

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Discussion Starter · #4 ·
35.2 kWh/100mi seems kinda high. It would have to be around 30.2 to get the 271mi range. What does the sticker say about combined MPGe?

I assume this is an M50. Do you have 20" rims, or 19"? If 20inch, then the range should be more like 227mi (according to the configurator), which is closer to the quoted 35.2 kWh/100mi = 233mi.
Responding to both your posts here

I have 19" rims. Based on your reply and other threads, no one reports a missing function in the math, it SHOULD be straightforward. The sticker says 96 MPGe, then says 94 city, 98 highway, 35.0 kW-hrs per 100 miles. Then, directly under that info it says "when fully charged, vehicle Driving Range 271 miles".

Nitpicking, I had said 35.2, but I have it out and it's 35.0. If it's simple math, 271 miles would be 95 kWh. So, I remain perplexed. My real world trips over 10 miles, even in sub-40 weather so far average about 30 kWh, so I'm optimistic it will get the job done on trips to the beach this summer, but this is only ownership Day 10, so I'm early in the info gathering process.
 

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Discussion Starter · #5 ·
You're right, though, there's definitely a disconnect between the combined MPGe (or kWh/100mi) and the stated range, even if you use the more optimistic 83.6kWh battery capacity. For example, the edrive40 with 18" rims is quoted at 109 MPGe, and 301mi range. Using 33.7kWh per gallon equivalent, here is my conversion spreadsheet:
View attachment 22634
It would have to get around 120 to 125 MPGe in order to get 301 miles of range.

I suspect they're using the more optimistic highway efficiency for the range calculation, rather than the combined city+highway measured efficiency.
Further update - by random chance, I added up my battery used and I hit 100% (100 to 31, filled to 81, then 81 to 50) exactly as I came home an hour ago. And, I traveled 222 miles. And average usage of 35.6 which corresponds to 79 kWh. Give or take a percent for rounding and that's close enough to specs. So...the window sticker is just wrong.

Again, beating a dead horse, I expect warmer weather and less having my friends and neighbors feel the launch mode will reflect stated range of 271 or better as time goes by. I took my brother for a spin on Saturday and hit 65 kWh / 100 for that brief 3 mile rip. That won't be the norm.
 
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