Volkswagen first showed its XL1 diesel plug-in hybrid electric vehicle prototype during the last week of January. The prototype, representing the third evolutionary stage of Volkswagen’s 1-liter car strategy features, according to VW, combined fuel consumption of 0.9 L/100 km (261 mpg US).  The plug-in hybrid system consists of a 0.8L two-cylinder TDI engine (35 […]

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