Reuters reported that Audi AG plans to increase the capacity at its Indian plant by 50%, the head of its India unit said, as it looks to become the country's biggest luxury vehicle brand. Mr Michael Perschke head of Audi India said that the Volkswagen AG owned carmaker plans to increase capacity at its Aurangabad plant in western India to 9,000 vehicles from 6,000 vehicles by the end of 2012. Audi sold just…