While the Tata Sierra is an impressive-looking SUV, we have yet to drive it on the road and experience its performance.
Also, the price list for all the variants is not out yet, so it’s uncertain which variant will be available within your ₹15 lakh budget.
Tata's after-sales and service support does have some catching up to do in comparison to Maruti and Hyundai. If you really liked the way the Sierra looks and what it offers, it would be worth waiting for.
However, if it does not turn out as per your requirements, the Mahindra XUV 3XO in AX5 L variant is very good. It has a smooth powertrain and a good feature list, along with a spacious rear seat and low maintenance costs.

