Before World War II, when most cars used body-on-frame rather than unit body construction, upscale automakers like Rolls-Royce, Packard, Cadillac, and Duesenberg offered rolling chassis upon which specialty coachbuilders would add custom bodies. This idea could be coming back, now aimed at engineers and specialty vehicle builders for test beds, prototyping mules, and even marketable low volume electric vehicles.

Many companies plan to start delivering its versatile EV platform in 2011 at a cost of $15,999. This all-wheel-drive platform uses welded and bonded aluminum and carbon steel tubing covered by a fiber-reinforced thermoplastics shell. Electric vehicle components like batteries, electric motors, and power electronics lend themselves well to a low profile platform like this, which allows ready placement of a variety of bodies that can be permanently or interchangeable mounted. While the basic 1,250 pound platform has an 80 inch wheelbase, shorter 64 inch and longer 96 inch wheelbase variants will be optional.

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