Mazda RX-8 Hydrogen RE

The Mazda RX-8 Hydrogen RE, also called the RX-8 HRE, is a 2003 bi-fuel version of the Mazda RX-8 sports car in which the twin-rotor Wankel rotary engine can run on either hydrogen or gasoline, and the driver switches between them with a button in the cabin. It was the fifth Mazda vehicle fitted with a hydrogen rotary engine. An aluminium and carbon fibre tank holding up to 2.4 kilograms of hydrogen at 350 bar sits beside the 61 litre gasoline tank and takes up most of the trunk, and in hydrogen mode the car emits only water vapour and has a range of about 100 km. Mazda obtained street approval in 2005, leased the first cars to Idemitsu and Iwatani the following year, and in November 2007 announced the delivery of 30 cars to the Norwegian hydrogen project Hynor.