I have seen two variants of Tata Indica Vista Diesel. TDi and Quadrajet. I am planning to buy one, but Quadrajet is more costly then TDi. But I need good performance car as I drive mainly on highways and that to long drives say 200-250Kms once or twice a week. So please let me know which a good model is so that it can help me in long terms. And also keeping in mind good mileage and it should be a long term car.