People tend to under estimate the effect of speed on energy consumption. A general rule is to take the speed at which you get your rated range (call it 50 mph for a tesla), and use this formula to guesstimate the drop Range*50^2 / mph^2.

So at 80 mph, it's 324*(50*50)/(80*80) or 324 * 0.39. So you should get about 40% of your rated range.

Add on the fact that no one starts at 100% battery and no one drives until 0% battery (let's say you go from 90 to 15%)...

Now your real world range at 80 mph is 324*(0.90-0.15) * (50*50) / (80*80) = 243 * 0.39 = 95 miles.

This is true for any vehicle, but ICE engines are so inefficient in the first place, the 'loss' from a speed increase is not as noticeable.

For a Tesla, there is almost no other energy 'losses', so the wind resistance 'loss' is THE most important factor (the dang thing has like 6 moving parts!!)

Just wait until the Ford Lightning launces...300 miles of range my

[email protected]@! That parachute at 80 mph is probably going to get 80 miles of range!