The all-new Tata Sierra marks the return of one of India’s most iconic SUVs, redesigned with modern engineering and equipped with a versatile powertrain lineup. The 2025 Sierra is offered with three distinct 1.5‑litre engines two petrol and one diesel along with multiple manual and automatic transmission options. All specifications below are taken directly from the official brochure.
1.5L NA Revotron Petrol Engine
The entry petrol option is the 1.5‑litre Naturally Aspirated Revotron, tuned for smooth power delivery and everyday driveability.
Key Specifications: – 1.5L, 4‑cylinder petrol – 106 PS @ 6000 rpm – 145 Nm @ 2100 rpm – Transmission options: – 6‑speed Manual (6MT) – 7‑speed Dual‑Clutch Automatic (7DCA)
This engine suits relaxed highway cruising and urban commuting where refinement and low running costs matter most.
1.5L TGDi Hyperion Turbo-Petrol Engine
The performance-focused option in the Sierra lineup is the 1.5‑litre TGDi Hyperion, engineered for strong acceleration and a refined, sporty drive.
Key Specifications: – 1.5L, 4‑cylinder turbocharged petrol – 160 PS @ 5000 rpm – 255 Nm @ 1750-4000 rpm – Transmission: – 6‑speed Automatic (6AT)
The TGDi engine features advanced technologies such as a variable geometry turbocharger, 350‑bar direct injection, dual variable cam timing, and intelligent lubrication. These systems work together to provide responsive performance with reduced NVH.
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1.5L KryoJet Diesel Engine
For drivers who prioritise long‑distance capability and strong low‑end torque, Tata offers the 1.5‑litre KryoJet Diesel.
Key Specifications: – 1.5L, 4‑cylinder diesel – 118 PS @ 4000 rpm – Torque: – 260 Nm @ 1500-2750 rpm (6MT) – 280 Nm @ 1500-2750 rpm (6AT) – Transmission options: – 6‑speed Manual (6MT) – 6‑speed Automatic (6AT)
This engine is suited for highway touring, hill driving, and carrying passengers or luggage without strain.
Transmission Options
The Tata Sierra offers a diverse set of transmission systems across its three engines.
6‑Speed Manual (6MT)
Available with the NA Petrol and Diesel engines, the manual gearbox provides direct control and good fuel economy for drivers who prefer engagement.
7‑Speed Dual‑Clutch Automatic (7DCA)
Paired with the 1.5L NA Revotron petrol engine, the 7DCA offers quick gear changes and smooth power delivery in city traffic.
6‑Speed Automatic (6AT – Aisin Torque‑Converter)
The automatic variants offered with the 1.5L TGDi Hyperion and 1.5L KryoJet Diesel utilise a 6‑speed torque‑converter automatic sourced from Aisin, Japan.
Aisin’s torque‑converter units are known for their long‑term durability, refined low‑speed behaviour, and smooth gear shifts. In the Sierra, this transmission pairs exceptionally well with both the high‑torque diesel and the performance‑oriented turbo‑petrol, offering a composed and predictable driving experience across varied road conditions.
Powertrain Summary
Conclusion
With three engines and multiple transmission choices-including a robust Aisin‑sourced 6‑speed torque‑converter automatic-the Tata Sierra offers one of the most flexible and technically advanced powertrain combinations in its segment. Whether the priority is refinement, performance, or long‑distance capability, the Sierra’s engine lineup has been engineered to meet diverse driving preferences while staying true to the SUV’s strong legacy.
