Tata Nano: 4-door hatchback. India. $2,497.

You know already the specs: 0.6 liter, 2-cyl (non-opposed), 33 HP and a fuel economy (combined) of about 5 l/100 (47 mpg). This car is well thought out, and lots of patents have been resulted from the creation process, from the Nano's powertrain to the assembly process itself. Will this car ruin the world? Some voices say that more cars on the roads imply more pollution, which is hard to argue against. On the other hand, Tata is betting that a green sheen won't hurt. The company will offer this model with Euro III compliant emissions from the start and with Euro IV compliance in the near future.

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