While we all wait for the Model X and Model III, the Model S continues to be Tesla's sole product. Under its attractive body, the Model S hides a 100% electric drivetrain. Several versions are available, from the 329-horsepower 70D to the 691-horsepower P85F. When there’s a “D” in the name, it indicates that there are two engines, one for the front wheels and the other for the rear wheels. This makes for all-wheel drive, of course. The other versions are almost equally fantastic.