My guess is that Tata is trying to establish itself as a more global retail auto brand in general. They figure that owning Jaguar and Land Rover will help them get their foot in the door of markets they currently have no existence. As far as I know Tata sell NO cars in Europe, South America, or North America. Basically they have Asia, Australia and Africa?? I also get the impression that they are a very industrial sorta auto company. They know how to build stuff and even build stuff for commercial sale, but have only limited marketing and retail sorta presence in automotive. They do OK with retail passenger cars in India, but India's car market is different in a big way from most western markets. The Indica they sell there is kinda the first car ever designed in India and is really not competitive with any similar cars sold in Europe or North America. They aimed even lower with the Nano, but I think they would really like to become a more serious Auto manufacturer and are looking for some western help. So they have kinda purchased that western help in buying JLR. I am sure they will invest well in JLR to keep them successful, but I think they are also going to ask a lot of JLR in the form of help in getting Tata to have a presence outside of India as an Auto brand.