Bertrand Piccard has driven 778km in a Hyundai Nexo, breaking the world record for the longest distance driven in a hydrogen-powered vehicle on a single tank.
Hyundai's ix35 Fuel Cell underwent an independent test, achieving the longest journey on a single tank of hydrogen.
A Skoda Fabia GreenLine, at the hands of economy driving expert Gerhard Plattner, has managed to travel from Austria to Denmark and back on a single tank of fuel, a distance of over 2,000km