General Motors has yet to confirm if the upcoming Cadillac ELR is front-wheel drive like the Volt or is a rear-wheel drive. Last August, Cadillac said that the brand will build extended-range vehicle dubbed as the ELR. The sleek 2+2 coupe is based on the Cadillac Converj concept displayed at the 2009 Detroit Auto Show. Its powertrain is quite similar to what’s loaded on the Chevrolet Volt, with a T-shaped lithium ion battery pack, a gasoline-powered electric generator, an electric-drive unit and a four-cylinder engine.
Some people in the industry think that for a model, which uses technology shared with Chevy, to still command a Cadillac price, there has to be considerable differences between the two cars. It won’t be enough for a Cadillac to have a separate sheet metal, a more luxurious interior and advanced infotainment system.
It’s possible that for the ELR to stand out, it will use a new rwd platform from GM that will be shared by the Cadillac ATS, a compact sedan is available starting next year. But there may be a problem since to use a rwd platform, the battery pack may need to be modified so the driveshaft could be positioned under it. The Volt's T-shaped battery pack is located below the rear seats and center console. The battery pack may be raised but this will take up space in the passenger compartment. This will affect rear seat comfort, particularly headroom. Making it worse is the slope of the roof as it approaches the rear of the vehicle. The ELR is expected to debut in 2013. [source: Autonews]