The Tesla Model S is a stunning all-electric executive car which has the design and practicality of a five-door luxury saloon. This is an exciting choice of private or business car for several reasons. The electric motor delivers supercar-rivalling performance figures. Importantly, however, the range you can achieve makes it feel like a credible choice next to any petrol or diesel-powered alternative. The Model S is cool, fast, fun to drive, filled with gadgets and returns a zero CO2 emissions output. This is one of the most interesting and cheap-to-run luxury cars around.