largest does not make Hyundai a premium brand. In that case Rolls Royce will never be a premium brand. or in that case Mercedes, BMW, Audi.
Suzuki sell a lot of Mehran much more than Corolla and Civic.. does it make it better then Corolla, Civic and make it flagship model and premium ?
Don't confuse premium by having more sales. premium means luxury, features, equipment , quality of build and many other things. Or in other words.. do you think a Hyundai Sonata is a premium model and Audi A6, BMW 5 series or E class is not premium??
Also most valuable brand does not make it a premium..