High Quality Content by WIKIPEDIA articles! The Premacy Hydrogen RE Hybrid is a 2007 bi-fuel version of the compact MPV Mazda5, in which the two-rotor Wankel engine allowes operation with hydrogen or gasoline. The hydrogen tank with 110 liters at 350 bar stores up to 2.4 kilograms of hydrogen and is in addition to the 60 liter petrol tank.