3. The Mazda RX-500
Produced in: 1970
Cost Estimate: Not revealed
Another window into the past was the Mazda RX-500 concept automobile from 1970. This two-door coupe with swiveling butterfly doors was a mid-engine vehicle. The original RX-500 was a concept vehicle meant to encourage driving safety. It included features like back lights that changed color to indicate different information rather than just turning on when the vehicle was braking.
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The car’s lights changed to green while it was speeding and to amber when it was cruising. The RX-500’s usage of plastic during production also contributed to its low weight of 1,873 pounds. With 247 horsepower, the car could reach a top speed of 150 miles per hour.
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