IT can keep up with a Ferrari, travel 400km on an empty fuel tank and is completely silent. The latest boys' toy for Silicon Valley multi-millionaires is a full-blooded American sportscar - only its blood is electricity, not oil. The Tesla Roadster, which can go from zero to 100km/h in about four seconds, is named after Serbian electrical engineer Nikola Tesla, who invented alternating current. The car is assembled in England and the electric motor is imported from Taiwan. The cars will be sold only in Los Angeles, San Francisco, Chicago, New York and Miami. The first deliveries are expected...