Green Cars of the Future

by Dan Lienert
Forbes.com
Robert Q. Riley Enterprises, a Phoenix-based design company, recently unveiled a "do-it-yourself" kit for building an advanced hybrid car.

For $200, you get the company's construction plans for a three-wheeled sports car called the XR-3. A completed XR-3 will reportedly deliver between 125 and 225 mpg. A three-cylinder diesel engine powers the front wheels and an electric motor run by a lithium-ion battery powers the rear wheel. The driver can switch between battery-only, diesel-only and hybrid driving modes. The DIY kit will be available this May or June.
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