VW to Build 250 XL1 314 MPG PHEVs

Volkswagen has designed a PHEV that achieved 314 MPG partly due to its highly efficient diesel-electric propulsion system. Not only are diesel engines much more efficient than gasoline engines, but electric motors are far more efficient than both of them, so Volkswagen combined diesel and electricity to achieve this. It is called the VW XL1, and Volkswagen hopes to sell about 250 of these unpriced super hybrids.

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