The Tata Sierra returned to Indian roads in December 2025, reviving one of the country's most beloved SUV nameplates after a three-decade absence. The new Sierra is a fundamentally different machine from the original — a modern midsize SUV built on Tata's new ARGOS platform with three engine choices, a genuinely spacious cabin and a verified 5-star Bharat NCAP safety record. This page compiles every verified specification in one clean reference.
Platform and Body Dimensions
The Sierra's ARGOS platform pushes its proportions toward the outer boundary of the 4.3-metre class. Its 2,730 mm wheelbase — just 11 mm shorter than the significantly larger Tata Harrier — is the architecture behind the rear-seat space that rivals cannot match.
| Dimension | Value |
|---|---|
| Length | 4,340 mm |
| Width | 1,841 mm |
| Height | 1,693 mm |
| Wheelbase | 2,730 mm |
| Ground Clearance | 205 mm |
| Seating Capacity | 5 |
| Drive Type | FWD (AWD under development) |
The 2,730 mm wheelbase gives the Sierra's rear bench more legroom than the Creta (2,610 mm) and Seltos can offer — a six-footer leaves a fist-width of kneeroom behind their own driving position. The 1,841 mm width is one of the widest in this price band, giving three rear passengers genuine shoulder room on long journeys.
Three Engine Options
The Sierra launches with three powertrain configurations — naturally aspirated petrol, turbocharged petrol and turbo diesel — a broader range than most midsize SUV rivals at this price point.
| Specification | 1.5L Petrol NA | 1.5L Turbo Petrol | 1.5L Turbo Diesel |
|---|---|---|---|
| Displacement | 1,498 cc | 1,498 cc | 1,497 cc |
| Max Power | 106 PS @ 6,000 rpm | 160 PS @ 5,000 rpm | 118 PS @ 4,000 rpm |
| Max Torque | 145 Nm @ 2,100 rpm | 255 Nm @ 1,750 rpm | 260 Nm (MT) / 280 Nm (AT) |
| Transmission | 6MT / 7DCT | 6AT only | 6MT / 6AT |
| Fuel Cycle | Atkinson Cycle | Conventional turbo | Turbo diesel |
The NA petrol's Atkinson Cycle is hybrid-ready — Tata can add mild or full hybrid assistance without a platform change. The turbo petrol does 0-100 km/h in approximately 10 seconds and makes effortless overtaking routine. The diesel suits high-mileage owners; at 60-80 km daily, its fuel savings typically offset its price premium within two to three years. This diesel does not require AdBlue, simplifying maintenance.
ARAI Mileage Figures
- 1.5L Petrol NA Manual: ~17.4 kmpl (ARAI)
- 1.5L Petrol NA DCT: ~17.4 kmpl (ARAI)
- 1.5L Diesel Manual: ~21.26 kmpl (ARAI)
- 1.5L Turbo Petrol: 8-10 kmpl city / 14-16 kmpl highway (real-world estimate)
Real-world petrol figures typically run 15-20 percent below ARAI — expect 13-15 kmpl in mixed use for the NA petrol. The diesel is the economy pick for high-mileage owners. The turbo petrol trades economy for pace: choose it for the driving experience, not the fuel bill.
Boot Space — Segment Leader
| Configuration | Volume |
|---|---|
| Rear seats up | 622 litres |
| 40% rear seat folded | 828 litres |
| 60% rear seat folded | 1,051 litres |
| Full rear seat folded | 1,257 litres |
At 622 litres, two cabin-sized trolley bags stack on top of each other without touching the parcel shelf. The Sierra's boot is the largest in its segment by a meaningful margin — families who regularly travel with luggage will immediately feel the difference versus Creta or Seltos-class rivals. The removable parcel tray slots against the rear seat when removed, leaving a clean cargo floor.
Safety — 5-Star Bharat NCAP
The Sierra received a perfect 5-star rating for both adult and child occupant protection in Bharat NCAP crash testing in March 2026. Six airbags, ABS with EBD, electronic stability programme, all-wheel disc brakes and ISOFIX child-seat mounts are standard on every variant. Higher trims add hill descent control, tyre pressure monitoring, front parking sensors and — on the Accomplished Plus — a full Level 2 ADAS suite.
Six airbags and ESC as standard even on the base variant means every Sierra buyer gets meaningful crash and stability protection. The 5-star Bharat NCAP result on the India-spec car is the strongest verified safety credential in this price band.
Features by Variant Band
- Smart Plus: 6 airbags, ESC, all-wheel discs, LED DRLs, 4-inch driver display, push-button start, 17-inch steel wheels
- Pure: 10.25-inch touchscreen, wireless Android Auto/Apple CarPlay, cruise control, auto-folding mirrors, rear camera
- Pure Plus: Panoramic sunroof, dual-zone auto climate control, auto headlamps, rain-sensing wipers, 17-inch alloys
- Adventure: 360-degree camera, blind-view monitor, front fog lamps, 7-inch digital cluster, roof rails, 18-inch alloys
- Adventure Plus: 12.3-inch touchscreen, 10.25-inch digital cluster, ambient lighting, boss mode, terrain modes, 19-inch alloys
- Accomplished: Leatherette seats, ventilated front seats, 12-speaker JBL Dolby Atmos, head-up display, 6-way powered driver seat, Level 2 ADAS
- Accomplished Plus: Triple-screen setup, co-driver 12.3-inch screen, Bi-LED booster headlamps, Amazon Alexa, air purifier, in-built navigation
Variant Prices
| Variant | Engine / Gearbox | Ex-Showroom (approx) |
|---|---|---|
| Smart Plus | 1.5 Petrol MT | Rs 11.49 lakh |
| Pure | 1.5 Petrol MT | Rs 12.99 lakh |
| Smart Plus Diesel | 1.5 Diesel MT | Rs 12.99 lakh |
| Pure Plus | 1.5 Petrol MT | Rs 14.49 lakh |
| Adventure | 1.5 Petrol MT | Rs 15.29 lakh |
| Adventure Plus | 1.5 Petrol MT | Rs 15.99 lakh |
| Adventure Plus Turbo | 1.5 Turbo Petrol AT | Rs 17.99 lakh |
| Accomplished | 1.5 Petrol MT | Rs 17.99 lakh |
| Accomplished Turbo | 1.5 Turbo Petrol AT | Rs 19.99 lakh |
| Accomplished Plus Diesel AT | 1.5 Diesel AT | Rs 21.29 lakh |
Prices are ex-showroom and subject to revision. Confirm current on-road pricing with your nearest Tata dealer before booking.
Key Takeaways
The Sierra earns its segment position on data. The 622-litre boot, the 2,730 mm wheelbase and the 5-star Bharat NCAP result are genuine differentiators against the Creta and Seltos. Three engine choices give it flexibility rivals lack. The cautions: diesel refinement trails Hyundai-Kia's benchmark, no AWD at launch, and top-variant pricing overlaps with the larger Tata Harrier and Mahindra XUV700. For buyers between Pure Plus and Adventure Plus — the segment's value sweet spot — the Sierra is a strong, data-backed recommendation.