Tata Tiago's claimed mileage is between 23.84 to 27.28 kmpl. If you are not getting the better mileage from your car, we would suggest you to please get the car checked from the nearest dealership. You may also check the followings links to get better mileage from your car: 10 Tips To Improve Your Car’s Mileage: click here to Ensure Good Fuel Economy: click here
The Tata Tiago XZA Plus being a higher variant has been offered with more features in comparison to the Tiago XZA. However, you may check the detailed feature and specification comparison in the link given below by adding the variants to compare.Click here for the comparison: click here
The Tiago petrol engine returns a fuel efficiency of 23.84kmpl, while the diesel engine has a claimed mileage of 27.28kmpl. If we talk about the Swift petrol variant, it delivers an ARAI-certified mileage of 22kmpl. If we talk about the power figures, both the cars deliver similar outputs. So, if mileage is the only preference and you are on a budget, then you may go for Tiago. On the other hand, Swift would be a better pick as it gets the better refined engine. Moreover, we would suggest you to take a test drive in order to clear your all doubts.