The Cadillac Converj concept caused quite a stir at 2009′s Detroit auto show—it was sporty, sleek, and, perhaps most buzz-worthy of all, used the Chevrolet Volt’s extended-range plug-in hybrid powertrain. Indeed, the two-door Converj concept was essentially a Volt in more dapper duds, and today GM announced it will go into production as the ELR. [...]

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