Let's recall that the AMD Ryzen is now used instead of the Intel Atom (there will be no retrofits for already produced cars). It uses more power to increase computing power, which directly translates to higher energy consumption and slightly less range.
It's probably a very small decrease in range, but big enough that it requires updated range ratings and even customer confirmations (at least in some markets) that they agree on the reduced range.
Most recently, Teslascope shared info provided by a Model 3 buyer in Australia, who was asked whether he accepted less range - 22 km (14 miles) or 3.5% less:
"We have updated Model 3 vehicles to optimize the touch screen experience with our new car computer. This hardware change requires more power, resulting in a minor drop in range. Your Model 3 range is now 602 kilometers (WLTP), 22 kilometers less than originally communicated."
This should explain why recently we saw adjustments to the WLTP range rating in Europe, where the new Model 3 got a lower range.
Interestingly, the new Model Y received a higher range - which might be associated with a bigger battery (82 kWh instead of 77 kWh, according to reports) or other changes (more usable battery capacity or other changes that resulted in overall higher efficiency).
Here are the Tesla Model 3/Tesla Model Y WLTP range adjustments:
- Model 3 RWD (no changes)
18" wheels: 510 km (317 miles)
19" wheels: 491 km (305 miles)
- Model 3 LR AWD
18" wheels: 626 km (389 miles), down by 11 km or 1.7% from 637 km
19" wheels: 602 km (374 miles), down by 12 km or 2.0% from 614 km
- Model 3 Performance
20" wheels: 547 km (340 miles), down by 20 km or 3.5% from 567 km
- Model Y LR AWD
19" wheels: 565 km (351 miles), up by 28 km or 5.2% from 537 km
20" wheels: 533 km (331 miles), up by 26 km or 5.1% from 507 km
- Model Y Performance
21" wheels: 514 km (319 miles), up by 34 km or 7.1% from 480 km