"If you can’t wait for the commercial arrival of Trev, the renewal energy vehicle, then roadsters in places like the UK and Australia may wish to consider the Hyundai i30, which picked up both the 2007 Car of the Year and 2007 Green Car of the Year in Australia.
Although claimed to have a fuel consumption of 4.7 litres per 100km, the i30 1.6-litre turbo-diesel managed to complete the 2007 World Solar Challenge conventional vehicle class (PDF) on a smell-of-an-oily-rag 3.2litres/100km (73.5 mpg!), while producing 97g/km of emissions. For comparision a Prius petrol hybrid averaged 5.6litres/100km with emissions of 146g/km.
So for Australians this means travelling from Melbourne to Brisbane on less than a tank of petrol, (Britons could do London-Paris return!) and with the cost of fuel on the rise this fuel economy should appeal to many.
The Hyundai i30 won the 2007 Green Car of the Year not only because of its spectacular fuel efficiency but because it matched this with pretty efficient pricing too. In Australia the i30 CRDi costs $21,490, while the Prius goes for about $37,400. (In the UK it looks like £12,995 on-road for the Hyundai i30 1.6 CRDi Manual.)"
Hyundai i30: 2007 Green Car (and Car) of the Year : TreeHugger