Yes, if your driving is primarily in the city, the combination of naturally aspirated petrol and a smooth automatic is the best option for you. Advantages of the Maruti Victoris are a slightly lower price and official fuel economy rating. 

However, do note that the Victoris uses a 6-speed torque converter automatic, while the Hyundai Creta uses a CVT, and in real-world use, the CVT is likely to be more efficient. The Creta outscores the Victoris in most other areas, too, including your requirement of comfortable back seats, where the Victoris is lacking in space. 

You could also check out the new Kia Seltos, which offers the same 1.5 petrol CVT powertrain as the Creta, but even better rear seat space and comfort.

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.   

Firstly, we don’t think you should worry about diesel restrictions on new cars in Mumbai. The current diesel engines are quite clean, and if there is a ban in the future, it will only be the older diesels that will be taken off the road. 

The Maruti Suzuki Victoris hybrid would have been a good choice. But as you said and we have pointed out too in our tests, the boot space is compromised because of the hybrid batteries, and the rear seats are not very spacious. 

The other cars you have listed are all turbo-petrol petrol, so they won’t be economical and will burn a hole in your pocket if you drive 80km every day. Since you have shortlisted some compact SUVs, we suggest you look at the Hyundai Venue diesel. It has just been launched, so it's very fresh and will age well over a 10-year lifecycle, and the diesel engine is very efficient and keeps your running costs under control.