Calling it “an ideal urban commuter for the 21st century,” Mazda showed the experimental HR-X at the end of 1991 at the Tokyo Motor Show.  A twin-chamber 1-liter rotary engine in this lightweight mini ran on hydrogen fuel and was targeted to produce  100 horsepower.  The 2+2 HR-X wrapped its fiber-resin plastic body panels over … Continue reading 1991 Mazda HR-X Hydrogen Concept Car