I have been driving a Zest diesel for the past 9 years, and earlier drove a Vista diesel and an Indica diesel. I now want to buy the Sierra. My usage is around 1,500-2,000 km per month, both in the city and on highways. Should I opt for a petrol or diesel version, given my usage? Kindly advise.

Since you have been using diesels for a long time, you are obviously happy with a diesel car’s characteristics of good efficiency, strong torque and are used to the higher noise levels as well. 

It would be logical for you to buy the diesel version of the Tata Sierra, which, though a touch noisy by class standards, has enough performance to make city and highway driving easy. We would suggest you opt for the smooth-shifting automatic transmission if your budget allows.