Want to buy a new car. My regular running is around 2000 to 2500 km a month. I am confused between buying a CNG car or a petrol automatic, as our route has very heavy traffic. If I go for a petrol automatic, it will increase fuel bills, and CNG does not come in an automatic. I am planning to go for an SUV or sedan, so the only cars available in automatic CNG are Tiago and Tigor.

Since your monthly usage is rather high, a CNG car will be much more economical than a petrol car. As you've rightly mentioned, the only cars available with a CNG + automatic combination are Tiago and Tigor. However, you haven't mentioned your budget, hence we're not sure how much you're comfortable spending.

That said, a CNG SUV that you could consider is the Maruti Brezza - its light clutch and smooth gearbox will ease your commute to a great extent. If budget isn't a constraint, you could also consider a diesel-automatic option like a Kia Sonet or a Mahindra XUV3XO.