Volkswagen combines XL1 powertrain with up! for the twin up! concept plug-in diesel hybrid; 214 mpg DB2013AL12826_small Introducing the twin up! Click to enlarge. Volkswagen presented the twin up! concept car at the Tokyo Motor Show. Equipped with a plug-in hybrid system from the super-efficient XL1 ( earlier post ), the four-seater based on the up! city car achieves combined fuel consumption of 1.1 liters per 100 km (214 mpg US ) (NEDC), with corresponding CO 2 emissions of 27 g/km. All new Volkswagen vehicles are configured to accept alternative drive systems as well as conventional ones, making installation of the compact XL1 plug-in hybrid system in the twin up! relatively easy. The only modification made in the production version was to lengthen the up!’s extremely short front overhang by 30 mm. The drive unit of the twin up! (system power: 55 kW) is mounted at the front of […]