When traveling at 75 mph (highway speeds) you get only 70% of the range you would receive at 55 mph. In addition the battery capacity is reduced by 30% after 6-9 years.
Therefore your highway range (@ 75 mph) with an 85 kWh pack will be 210 miles initially and around the time the warranty expires it will be down to 150 miles.
For the 60 kWh pack it's even worse. 230 miles is 160 to start, dropping to 115 or so.
And for the 40 kWh pack you start at 115 on the highway and go to about 80 miles in range by year 8.
The Tesla Model S, even with the biggest battery pack, is more of an intra-city car than an inter-city car.
Under the best case scenario if you take the Model S on the highway you can drive for 2 hours and 50 minutes before you have to pull over for 1 hour to recharge. That's the biggest battery pack on the day that you bought the car. It only goes downhill from there. This is not going to be your road trip car.
Source: Roadster Efficiency and Range | Blog | Tesla Motors (see spreadsheet)
Therefore your highway range (@ 75 mph) with an 85 kWh pack will be 210 miles initially and around the time the warranty expires it will be down to 150 miles.
For the 60 kWh pack it's even worse. 230 miles is 160 to start, dropping to 115 or so.
And for the 40 kWh pack you start at 115 on the highway and go to about 80 miles in range by year 8.
The Tesla Model S, even with the biggest battery pack, is more of an intra-city car than an inter-city car.
Under the best case scenario if you take the Model S on the highway you can drive for 2 hours and 50 minutes before you have to pull over for 1 hour to recharge. That's the biggest battery pack on the day that you bought the car. It only goes downhill from there. This is not going to be your road trip car.
Source: Roadster Efficiency and Range | Blog | Tesla Motors (see spreadsheet)