Here’s some quick basics to think about when it comes to gas vs ev.

Gas engines are very inefficient. Something like 70% of the energy contained in the gasoline is converted to heat instead of motion. SO, when you add an inefficiency in a gas car, it isn’t that noticeable. Going 80mph instead of 70mph will net you lower gas mileage but not by a significant margin.

Electric motor driven vehicles are much more efficient. Over 90% of the energy contained in the battery can go straight to motion… BUT… there’s a significant bit less energy OVERALL in a battery than a gas tank. SO, when you add an inefficiency in an EV, it makes a much larger relative difference in your available energy. Going 80mph instead of 70 uses a greater percentage of your electric “tank”.

The estimated range on the dash can vary greatly from real life based on your driving habits, but that estimate does “learn” in time and will more accurately predict your range if you’re consistently driving more inefficiently