There are a lot of variables for range. So some questions I have:
- How fast were you driving? Going 85 vs 65 makes a BIG difference. But a lot of Tesla drivers have "led feet" and see much shorter than expected range.
- The hilly terrain - was it mostly uphill, or downhill, or did you end up at roughly the same altitude as before. You'll lose a lot going uphill, but regen braking should give some of it back.
But one thing is sure... it is very difficult to reach Tesla's claimed range numbers without going 50mph without A/C. The practical max range for most seems to be 70-80% of the claimed Tesla EPA range. But it depends on how you drive, and weather/wind can also reduce it further.
But that is all from my online reading, I'm still waiting for my car to be delivered.
I was driving closer to 80 mph, and it was mostly uphill when I lost 60% driving 77 miles. It was just so shocking for me. That's when I went back and checked the trip details from last month when I drove the same route with the Avalon. Was quite shocked to see I drove the same terrain in the Avalon covering around 400 miles on tank of gas with some left to spare at the end of the trip!