New Tata Sierra 1.5L Turbo Petrol Engine Sets Fuel Economy Record

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New Tata Sierra is powered by a 1.5L turbo petrol engine producing 160 PS maximum power and 255 Nm, paired with a six-speed AT

Tata Motors has announced that the all-new Sierra has now entered the India Book of Records for setting the highest fuel efficiency figure achieved over a 12-hour period. During a certified endurance run at the NATRAX proving ground in Indore, the Sierra clocked an impressive 29.9 kmpl – surpassing the previous national record and placing the SUV in a league of its own.

The continuous drive was carried out on November 30, 2025, by the Pixel Motion team, who kept the vehicle running from 7 AM to 7 PM with only short, scheduled stops for driver changes. Officials validated the record on the same day. The test vehicles used Tata’s new 1.5-litre Hyperion turbocharged petrol engine.

It has been said to be engineered around efficiency-first architecture without sacrificing smoothness, drivability or performance headroom. Its finely calibrated combustion process, wide and usable torque band and reduced internal friction allowed the Sierra to maintain consistent delivery throughout the lengthy half day cycle according to Tata.

Also Read: New Tata Sierra Detailed Drive Review & 700+ Km Mileage Test

To know how the new powertrain works in real-world conditions, our detailed drive review and 700 km mileage test is already up on our Youtube channel. The record-setting run wasn’t limited to efficiency alone. In a separate test at the same facility, the Sierra hit a top speed of 222 kmph under controlled conditions – further demonstrating the performance potential of the Hyperion engine.

However, Tata Motors clarified that customer vehicles will be electronically limited to 190 kmph in adherence to the company’s safety norms. Tata Motors has also issued an advisory stressing that the fuel efficiency and top speed tests were conducted by trained professionals under tightly regulated environments and it strongly discourages owners from attempting to replicate such speeds or driving styles.

Also Read: Big Year-End Tata Discounts Across ICE Cars – Nexon, Altroz, Punch, Safari

The new midsize SUV is also equipped with a 1.5-litre NA petrol engine and a 1.5-litre diesel mill. The transmission options include a six-speed manual, a six-speed torque converter AT and a seven-speed dual clutch automatic unit. The new Sierra scored five stars in Bharat NCAP crash tests and is underpinned by the modular ARGOS platform.

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