Let's say for a "Company X" - there are two well-established, legitimate ways of growing. Organic - whereby one engages in R&D to develop indigenous technology. And Second - Inorganic - whereby one surpasses the long and tedious part, and simply buys out someone with the technical know how. Either ways, the technology, the product, the brand, the company and the know-how rests solely with "Company X", which in this case happens to be Tata Motors, which happens to be an Indian automotive giant.
And don't be so dismissive of the ability to write checks. Tata Motors worked itself into a powerful position to be able to challenge global giants. Today, Tata Motors' market cap, alone, is roughly 5 times that of the entire auto sector in pak.