XR3: 225 MPG Plug-In Hybrid Trike Headed for Production

Robert Riley’s XR3 kit car is an amazing three-wheeled plug-in diesel hybrid. The trike gets a jaw dropping 225mpg on combined diesel-electric power and 125mpg when using only the 23hp diesel engine.

And hey, it kinda looks like that Back to the Future car!

Introduced back in June of 2008, the two-passenger car was designed so it can be assembled using readily available parts. Fully constructed, the car weighs in at 1480 pounds and has top speed of 80mph. And while you can only get 40 miles out of its li-ion battery pack, it can be plugged into any standard wall socket.

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