Due to financial hardships during that time, the luxury brand was abandoned as well as those two engines.
Like several other Japanese makers, Mazda produced V-twin engines for their three-wheeled delivery vehicles of the 1950s.
Mazda is the only producer of successful Wankel engines, positioning them as a prime sports car powerplant.
All of Mazda's Wankels are based on their first design of the 1960s, though there have been significant developments over the four decades.
After Mazda RX-8 production ceased in 2013, Mazda has carried on with testing prototypes to re-introduce the rotary as part of the "SkyActiv" lineup, dubbed SkyActiv R, displacing 1600 cc and featuring direct injection, laser ignition and forced induction.