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The fuel cell buses Tata is looking at will be able to run about 155 miles (250km) on one fill and could be used for inter-city and intra-city trips. The same fuel cell technology will later be used in smaller cars as well as SUV's. Tata is also working on a Hydrogen-based internal combustion engine as well as an Indica model that would run on a mix of compressed natural gas (CNG) and Hydrogen.
The push by Tata Motors comes along with the government of India's plan to pump in more than $5 billion (Rs 25,000 crore) into a national Hydrogen energy board to support the Technology Information Forecasting and Assessment Council and their focus on building technologies and engines using Hydrogen as fuel.
http://timesofindia.indiatimes.com/Business/India_Business/Tata_inks_plan_for_green_cars/articleshow/2570425.cms