[Martinjlm]

Originally Posted by 90503

...400+ miles on the electric "tank"...hmmm....If they are going to sell these all electric vehicles, they need to be more specific and honest...Gas engines show highway mileage and city mileage...Electrics never disclose how many miles they will go continuously at highway speeds....The mileage drops like a rock....My guess, at continuous highway (60-80mph) speeds this Rivian won't go barely about 100 miles...


The advertised "range" of electrics is usually an unicorn-fantasy that can only be obtained by going 20-30 mph or something like that....and going 400 miles in one shot would take about two days....Maybe I'm wrong, but I don't think so...You never see an electric say how many miles it can go strictly at highway speeds...and that's because it is usually abysmal and is a deal killer once realized and the true cause of "range anxiety".

Early EVs I'd say you're spot on. Newer ones are really not bad at all. Having driven numerous Teslas in mixed (some city, some highway, some "suburban thoroughfare") I can say from personal experience that most newer EVs do a better job of predicting range on the in-vehicle display than gas vehicles. If they say you have 54 miles left, you probably have 55. My wife has been driving Chevrolet Volts since mid-2011. The first one was rated 38 miles on a full charge. Depending on the temperature that day, when she got in the car it would read anywhere from mid-20s to mid-40s (lowest on really cold days). It was very accurate in that regard. Some variation due to driver behavior. Her current Volt (no pun intended) is rated at either 43 or 44 miles per full charge. On cold days it says 34 - 37. On warm days I've seen as high as 54. Whenever I drive her car I outperform the estimate. That's because I know how to use regen braking better than she does.

I had a Bolt EV for two weeks in November 2016. Not too cold, definitely not hot. Rated at 238 per full charge. Again, mixed driving like in the Teslas I've driven. I NEVER had the range estimate fall short of what it started at. The guess-o-meter was usually pretty much dead on or maybe a little conservative.