what are your thoughts on why all 2019 performance models (with the Performance Upgrade Package) were rated for 310 miles; while the current 2020 performance models (with the PUP) are now rated for 299 miles. If Tesla was indeed able to improve efficiency with all 2020 Model 3’s, shouldn't we also see a range increase in this particular model/configuration?
Previously, Performance was regarded as a “trim level” of AWD. The EPA allows you to quote the range/efficiency of the vehicle which makes up more than 66% of sales, and ignore any trim levels which have a low take rate (like the Performance 20”).
So previously in 2019, Tesla was not obligated to quote the actual range of the 20” Performance. What was being quoted was the range of the AWD or Performance Stealth (which used to be identical vehicles with identical motors). There is no prior year rating for a Performance 20”. When you bought a Performance with PUP previously, the 310 mile rating it had was not for that actual vehicle - it was for the Performance Stealth (or AWD with aeros).
Now that the Performance has a different rear motor than the AWD, in 2020, this exception no longer applies, and furthermore Tesla has decided to just call out each trim level (18”, 19”, 20”) individually.
If there had been a rating for the Performance with PUP in prior years, it would have had a result lower than 299 (probably would have been something like 290 miles).