Without knowing further requirements, it is hard to recommend the ideal pick for you. However, we feel the New Kia Seltos will be the best pick in your budget. 

Prices will only be announced on January 2, but assuming a reasonable increase over current model prices, you should be able to get a decently equipped model within Rs 17 lakh. The Seltos has the edge over the other two with a far superior naturally-aspirated petrol engine. The Seltos also scores for space. 

The Maruti Suzuki Victoris is a sensible package and is good value. However, the dull engine and relatively small cabin mark it down. Tata's Sierra is the roomiest of the three options, but versions within your budget miss many features that you'd expect. 

The bigger issue is that the Sierra's 1.5-litre naturally-aspirated petrol engine feels underpowered, and performance is disappointing.   

The best option for you, aside from your loyalty to the Tata car, is the new Tata Sierra. It is a comfortable five-seater with the most spacious back seat in the segment. 

The Sierra’s cabin feels very premium, too, and is made of quality materials. The driver’s seat is quite spacious, and despite your weight, you should be able to find a comfortable driving position. Go for the automatic 1.5 turbo-petrol variant, which is a bit pricey, but is a nice and significant step up from the Tata Nexon.
 

The most fun-to-drive SUVs in your budget are the 1.5-litre Volkswagen Taigun and Skoda Kushaq twins, which are very engaging thanks to their brilliant dynamics and a powerful, punchy engine. 

Both are due for a facelift, and the upgraded Kushaq is just around the corner and scheduled to launch on January 20th 2026. The Volkswagen Taigun facelift will come a month later. Both these SUVs will see some significant enhancements to the air conditioning and interiors. 

Top-end variants will come with rear massage seats, a first in the segment. However, one weakness is the rear seat space, which is relatively narrow and best for four. 

Therefore, if this is a deal-breaker for you, you could consider the Tata Sierra. It is fantastically spacious, has superb ride and handling and an all-new 1.5 petrol engine, which is smooth, punchy and fairly efficient too. 

The Sierra is not as engaging to drive as the Kushaq and Taigun, as it is heavier and has a relaxed power delivery. We would rule out the MG Hector in your case as it is too big, it's not a very engaging car to drive, and as you said, it guzzles fuel.
 

If you’re choosing between the two, the Tata Sierra comes across as the better overall package. 

It’s built at Tata’s newest facility, and that shows - the quality, fit, and finish are a big step up from anything the brand has done before. The cabin feels nicely put together, and the petrol motor is smooth yet punchy. Moreover, the car strikes an outstanding balance between ride comfort and handling.

The Tata Harrier, on the other hand, is larger and offers a bit more space inside. But the Sierra still has more than enough room for daily city runs. Also, it’s a little smaller, and it’s actually easier to manage on Bengaluru’s packed roads and tight parking spots.
 

The Tata Sierra seems like a logical upgrade. It is built tough, its suspension can take on a beating yet it does well in terms of ride comfort, and the new turbo-petrol engine is smooth, refined and delivers diesel-like performance. 

Being a tall vehicle, space is also good, especially for you and your tall family members. Tata's service experience can be a hit or miss, but the Sierra is seriously worth considering. You may also shortlist the new Kia Seltos, which is also a very promising option.

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Yes, the Tata Sierra is an excellent choice and will feel like a huge upgrade over your existing car. Besides being spacious and comfortable, it feels well-built and drives with confidence. The Pure+ variant that you're considering is very well-equipped, and certainly good value for money. Go for it.