Mazda RX-8 Hydrogen RE

The Mazda RX-8 Hydrogen RE is a 2003 bi-fuel version of the RX-8 sports car, in which the twin-rotor wankel rotary engine is configured to run on either hydrogen or gasoline. This is the fifth Mazda vehicle to be fitted with a hydrogen wankel rotary engine.

Mazda RX-8 Hydrogen RE
Overview
Manufacturer	Mazda
Also called	Mazda RX-8 HRE
Production	2003; 2006 (1 built)
Body and chassis
Related	Mazda RX-8
Powertrain
Engine	1.3 L, 2-rotor Renesis R2 Wankel Rotary engine
Transmission	5-speed manual 4-Speed Jatco-Mazda RC4A-EL automatic
Hybrid drivetrain	dual-fuel system
Range	100 km (62 mi) (Hydrogen mode)

Specifications

Mazda RX-8 Hydrogen RE rear

The hydrogen tank is made up of aluminum and carbon fibre and has a capacity of 110 liters at 350 bar stores up to 2.4 kilograms of hydrogen and is fitted in addition to the 61-liter gasoline tank. The car can be switched from gasoline to hydrogen mode using a button in the cabin.^[1] The Hydrogen tank takes up most of the RX-8s trunk space and all the hydrogen components weigh in at 187 lbs in total. Running in hydrogen mode, it produces no emissions other than water vapor and has a range of around 100 km (62 mi).^[2] In 2005, Mazda obtained street approval for this vehicle. The following year, the first vehicles were leased to customers in Idemitsu and Iwatani at a price of 420,000 JPY per month.^[3] In November 2007, Mazda announced the delivery of 30 RX-8 HRE to the Norwegian hydrogen project Hynor.^[4]

The bivalent RENESIS wankel rotary engine has the following data:

Engine	twin-rotor Wankel engine
Chamber volume	2 x 654 cc (equivalent Displacement: 1,308 cc)
Mode	Hydrogen	Gasoline
Performance	80 kW (107 hp, 109 PS)	154 kW (206 hp, 210 PS)
Maximum torque	140 Nm (103 lb ft) at 5.000 U/min	222 Nm (164 lb ft) at 5.000 U/min
Maximum speed	170 km/h (106 mph) (H2-operation)
Acceleration from 0–100 km/h (0-62 mph).	10 seconds	7.2 seconds

See also

• Mazda Premacy Hydrogen RE Hybrid
• List of hydrogen internal combustion engine vehicles