Since you frequent highways and the economy is a priority, a diesel SUV would be a good choice for you. In the Rs 15-20 lakh price range, the Kia Seltos is the newest option and has the right makings with a strong diesel engine, a well-equipped cabin and Kia’s widespread network. The HTK (O) trim comes well packed with features that you would need and makes for a strong case.
The Tata Sierra is also an option to consider if the Seltos’ design is a bit too over the top for you. The Sierra has lots of room in the cabin, and the diesel engine is refined and punchy as well.
If both these dont sit well with you, the Hyundai Creta is the safest bet. It has a clean, no-nonsense design, a well-equipped cabin and the same strong diesel engine as the Seltos. It will also hold its value better since the Creta brand name is much stronger.
All three have good room in the cabin, and boot space for four is sufficient too.