Tata Sierra Mileage Revealed: RTI Uncovers Surprising Figures, 29.9 kmpl in Records

• RTI reveals Tata Sierra's 1.5L TGDi Hyperion Petrol version delivers 13.5 kmpl, while the 1.5L Cryojet Diesel engine offers 18.8 kmpl.
• The 1.5-liter naturally aspirated petrol variant has not yet received ARAI certification.
• Tata Sierra recorded an impressive 29.9 kmpl in a 12-hour continuous test at NATRAX, entering the India Book of Records.
• Despite mileage discussions, Tata Sierra has over 1 lakh bookings and a growing waiting period.
• Tata Sierra EV is expected to launch in June 2026, with current production at 15,000 units per month.