One of the coolest concept cars here at the Tokyo Motor Show isn't even new. In fact, it's almost forty years old. Originally displayed at the Tokyo show in 1970, this Mazda RX-500 Concept features styling similar to the legendary Ferrari 250 GTO Breadvan, gullwing doors that swing forward, and a 491cc rotary engine just behind the seats. Weighing in at just 1873 pounds, the 247-horsepower concept was said to have reached nearly 150 mph on Mazda's test track.
