AC Propulsion' s tzero out-accelerated a Ferrari F355, a new Corvette, and a Porsche Carrera 4 in a series of impromptu 1/8 mile drag races held last weekend at Moffett Field in Mountain View, California, and at Calstart' s northern facility at the former Alameda Naval Air Station. ... The tzero is a silicon hot rod. It starts with the hot rodder's holy grail, horsepower - 200 of them. But the tzero harnesses the power with 120 IGBTs, equal to 7200 square millimeters of silicon-based control. The result is acceleration to 60 mph in 4.1 seconds, efficiency equivalent to 70 mpg, and emissions equal to zero. The tzero is an electric car.