Tata Sierra 1.5 turbo-petrol AT real-world mileage tested: City, highway, and verdict

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The Tata Sierra 1.5 Turbo-Petrol AT promises strong performance with modern automatic convenience, but what does it deliver in the real world? In this detailed test, we measure its city, highway and mixed mileage.

Utsav Chaudhary

Apr 14, 2026 09:19 am IST

Tata Sierra
Tata Sierra 1.5 Turbo-Petrol AT Mileage Test

Tata Motors has yet to announce official mileage figures for the Sierra 1.5-litre turbo-petrol engine with a six-speed automatic transmission. The mid-size SUV, launched in December last year, starts at Rs. 11.49 lakh (ex-showroom). The Sierra recently underwent independent fuel efficiency testing, providing real-world data for prospective buyers.

Key Highlights

  • Tata Sierra 1.5 turbo-petrol AT tested for real-world fuel efficiency
  • City mileage recorded at 8.95 kmpl and highway at 13.12 kmpl
  • Average fuel efficiency stands at 9.99 kmpl for the tested variant
  • Official mileage figures from Tata Motors remain undisclosed

Key Specifications and Performance

Tata Sierra Performance
Tata Sierra Performance

The tested Tata Sierra variant features a 1.5-litre turbo-petrol engine paired with a six-speed torque converter automatic gearbox. This combination delivers 158 HP of power and 255 Nm of peak torque. During city driving, the Sierra achieved a fuel efficiency of 8.95 kmpl. On the highway, the vehicle returned 13.12 kmpl. The combined average fuel efficiency recorded was 9.99 kmpl.

Despite these test results, Tata Motors has not released official mileage figures for any Sierra variant. The tested model represents the automatic petrol option, which is expected to be a popular choice among buyers seeking convenience and performance.

Safety and Market Position

The Sierra competes in the mid-size SUV segment, where safety and efficiency are key considerations. A prominent rival recently received top honors in the BNCAP crash test, highlighting the segment's focus on occupant protection. The Sierra aims to attract buyers with its turbocharged performance and automatic transmission, alongside competitive pricing starting at Rs. 11.49 lakh.

As more data becomes available, buyers can expect further clarity on the Sierra's real-world efficiency across different variants. For now, the independent test results provide a useful benchmark for those considering the 1.5-litre turbo-petrol automatic model.

Also Read: How Post-Purchase Assurances are Changing Used Car Buying for Good

CarBike 360 Says

The Tata Sierra 1.5 Turbo-Petrol AT strikes a practical balance between performance and efficiency, especially if you drive with a light right foot and use Eco or City mode intelligently. Its relaxed highway manners and refined powertrain make it a capable long-distance companion, while acceptable urban economy keep running costs in check. If you value comfort and features over outright frugality, this combo makes solid sense.

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