3 Wheeled 225 mpg Electric / Diesel
The XR-3 hybrid is a three-wheeled vehicle loaded up with a diesel engine and lithium-ion batteries. Just like some other hybrid vehicles, it looks futuristic but not that practical. Since XR-3 is a two-passenger plug-in hybrid you can't load your family into it, they must also consider the shape of a vehicle that families would actually want to use on a daily basis. On the contrary its high performance design combines lightening-fast acceleration, a top speed of 85 mph, as well as fuel economy of 125- to over 200-mpg.