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"Using the interior space and fuel economy of the current production Prius as a starting point, the 1/X Concept (pronounced one-Xth) is intended take fuel economy and weight savings to the extreme, resulting in a vehicle that is twice as fuel efficient and two-thirds lighter.   Weighing just 926 lb., the 1/X is constructed of lightweight, yet rigid, carbon-fiber-reinforced plastic. This high-strength material allows for thin pillars, and the clear body panels enhance outward visibility.   The plug-in hybrid powertrain includes a 500-cc internal combustion engine that enables the batteries to be recharged while the vehicle is in motion. The drivetrain is located beneath the vehicle&amp;#039;s rear seat, which not only increases room in the passenger cabin, but also contributes to a low center of gravity and improved vehicle dynamics.   While the shape is interesting, the fact that Toyota chose to show the vehicle with the right side cut away and only two of the four seats inside in order to display the powertrain layout indicates that we won&amp;#039;t be seeing the 1/X any time soon, but that a future Prius may in fact be rear drive using the same configuration. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/car-shows/tokyo-auto-show/news/a13620/toyota-1x-concept/>