Looking more like a spaceship or an imaginary vehicle out of the Jetsons than anything else currently on the road, the Accelerated Composites Aptera uses a diesel/electric hybrid drivetrain which they claim is good for over 200 mpg at a constant 55 mph, using nickel-zinc batteries. The performance appears quite livable, with zero to sixty times coming in at 10 seconds. Using some sort of advanced carbon fiber technology for production hopes, the three-wheeled vehicle is expected to be available for less than $20 thousand.
It would be appropriate to mention that with three wheels, here in the U.S. at least it would be considered a motorcycle. This means that wearing a helmet and a motorcycle endorsement would be required in states where they are necessary for three-wheeled motorcycles. The normal motorcycle benefits would be included as well, such as being able to use carpool and high occupancy lanes and the like. As more information becomes available, we will keep you informed.
[Source: Aptera via Wired via Hugg.