The German automakers—BMW, Mercedes, Audi, and Porsche—typically provide a relatively conservative range figure, allowing us to meet or even at times exceed the range numbers in Car and Driver’s real-world tests. Tesla, meanwhile, pursues an impressive figure for its window stickers, and ends up returning real-world results that are on average two times as far off the label value as most EVs. 

https://www.theverge.com/2023/10/23/23928563/tesla-doj-ev-range-exaggerate-investigation