Cadillac has surprised the Detroit show with its Converj concept, an electric luxury coupe.
Designed by Brit Simon Cox, the Cadillac Converj uses the same propulsion system as the Chevy Volt. The so-called Voltec system means that the wheels are always battery powered, offering a 40-mile range which can then be extended with a four-cylinder petrol engine charging the lithium-ion battery.
GM's product czar Bob Lutz said that the Cadillac Converj concept proves that the blueprint lai...
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