The reason for this is that whereas the XL1 was designed for uncompromising fuel efficiency, the design brief of the XL Sport took this a step further with the inclusion of uncompromising driving dynamics. The special requirements regarding the downforce values of a 270 km/h car and the parameters of the drive technology led to the XL Sport being longer and wider than the XL1. Dimensions in detail: The XL Sport showcased in Paris is 4,291 mm long (XL1: 3,888 mm), 1,847 mm wide (XL1: 1,664 mm), 1,152 mm high (XL1: 1,153 mm). The wheelbase has also been increased to 2,424 mm (XL1: 2,224 mm). These proportions in themselves create a compelling look. Design concept. When extreme proportions encounter an innovative, progressive and precise design, icons are created. Such is the case with the XL Sport. As outlined above, the concept car builds on the dynamic and extravagant design of the XL1.