Submitted by erezarmo on Tue, 2012-08-28 14:40
I'll start by stating that I admire Tesla and its technological accomplishments with the Model S.
However, something doesn't work out with the EPA numbers, and I wanted to understand it.!
Motortrend got better consumption than epa (100.7 vs 89 mpge), yet it got a significantly worse range.
That doesn't make any sense, so it got me thinking.
If you use epa 89 mpge number on 85 kwh (assuming you could really use every bit of juice in it), you get a range of 224.5 miles ((85/33.7)*89), and around 210 mile assuming 80 kwh are usable (as found out by motortrend).
If you look at the epa 265 mile range - it requires over 100 kwh of USABLE battery capacity at 89 mpge ((265/89)*33.7).
These two numbers don't match. They match much better in the epa ratings of other electric vehicles.
Which one is correct - Mpge or range?