Q. Q. I am Confused between Tata Nexon and Tiago NRG. 1) I have a lot of distance to be driven on a regular basis. Hence from mileage perspective which of the two is a better a option? 2) Is there an option for a factory fitted CNG cylinder/tank? Also if this is a better option considering the performance of the vehicle in the long run? 3) Which of the two Nexon or Tiago NRG has a better ground clearance? 4) If I need to add an ac vent for the rear seat passengers how much would it cost?