Tesla has consistently exaggerated the driving range of its electric vehicles, reportedly leading car owners to think something was broken when actual driving range was much lower than advertised. When these owners scheduled service appointments to fix the problem, Tesla canceled the appointments because there was no way to improve the actual distance Tesla cars could drive between charges, according to an investigation by Reuters.
Every road test I’ve seen has shown Tesla cars being more efficient and getting more range than other manufacturers. But I do question the results. I have a BMW i3. I always get about 2/3 of the official range. Always been happy with that. But people complain about the range while having the temperature at max in winter (with t shirt on) and then AC set to freezing in the summer (wearing a jumper). They just drain the battery.
The range is determined by no use of any electronics (lights, radio, climate control, stereo etc) and ideal weather and road conditions. You get less than the max because you aren’t driving at max efficiency at all times.