4 ms·

I tried the range calculator but it doesn't let me compute expected range for driving 75 mph on a highway on a 120 degree F Arizona summer day..... Not to ment

• mikeyouse 12y ago
  Driving any car at 85mph will nuke the mileage.. DOE figures for 80mph vs. 55mph show a 30% reduction in mileage, so I'd imagine 85mpg is more like a 35% reduction. Given that MPG isn't a direct linkage, it's worth noting that this will roughly double your driving cost per mile depending on the car.. http://www.fueleconomy.gov/feg/driveHabits.jsp http://www.fueleconomy.gov/feg/driveHabits.jsp
  • mbell 12y ago
    I would imagine the DOE numbers are some sort of average. Considering how un-aerodynamic the average US car is I would guess that number isn't terribly accurate for a vehicle like the roadster.
  • nnethercote 12y ago
    You don't have to guess. The linked article has two graphs showing the range obtained at speeds ranging from 40 mph to 85 mph for different models. For the 85 KWh battery pack going at 55 mph you'll get about 350 miles of range. Going at 85 mph you'll just over 200 miles of range. That's slightly more than a 40% reduction.