The Air Car runs on compressed air, managing speeds of 68 mph (109 kph) and has a range of 125 miles on one tank of air. A duel-fuel version that can use petrol-powered compressor in the country would have a range of up to 2,000 miles between refills.
The tank can be filled for around $2.00 (but only at specially equipped gas stations), or can be plugged into your home power socket to fill the tank in around 4 hours.
I'd love to see an off-road version developed based on the old Haflinger AWD vehicle (I have an old haflinger that is patiently waiting restoration). Combined with a removable air tank (so you could recharge one tank using solar power while driving with the other), I think this would be the perfect "post apocalypse" transportation. And while waiting for WWIII you could drive it around town ;)