We've spent our fair share of time behind the dash of Tesla's gorgeous Model S, though there hasn't been an opportunity to push the all-electric vehicle to its limits on the fuel battery front. The sedan still isn't quite ready for a full-on range test, but the manufacturer has provided a teaser in the form of some updated stats, with a line graph demonstrating consistent improvements over the Roadster. Assuming constant highway travel at speeds of 50-70 miles-per-hour, the Model S is expected to contin
