The roadster should soon be upgradeable to 640 km (official) range, so probably 450 to 500 km practical. Quotation: Tesla的s very first car, the Roadster, was based on a lightweight Lotus Elise chassis and launched back in 2008. Its range of 245 miles is still pretty impressive, but Tesla boss Elon Musk is planning an upgrade for owners that will see that range increase to about 400 miles. pack and it should have a range of about 400 miles, which wants to allow you to drive from LA to San Francisco non-stop.