At a glance, the Tata Sierra and the Mahindra Thar Roxx can both look like aspirational SUVs, but they are built with very different priorities. The Sierra is positioned as a modern, road-focused 5-seater aimed at comfort, cabin tech and everyday practicality. The Thar Roxx is a rugged, lifestyle-oriented 5-door SUV built around stance, durability and genuine rough-road capability.
Tata Sierra vs Mahindra Thar Roxx: Dimensions
Dimensions tell you how the SUV will fit into your daily life. A taller, longer SUV can feel commanding and more confident on broken roads, but it can be harder to park and manoeuvre. Wheelbase influences rear-seat comfort, and boot space changes how convenient road trips are.
| Dimension | Tata Sierra | Mahindra Thar Roxx |
| Length | 4340 mm | 4428 mm |
| Width | 1841 mm | 1870 mm |
| Height | 1715 mm | 1923 mm |
| Wheelbase | 2730 mm | 2850 mm |
| Boot space | 622 L | 447 L |
| Ground clearance | 205 mm | 226 mm (commonly listed) |
Also Read: Complete Guide to Buying a Mahindra Thar Roxx
Tata Sierra vs Mahindra Thar Roxx: Engine & Transmission
Powertrain choices decide how relaxed the SUV feels with passengers, how easy overtakes are, and how smooth it is in city traffic. Petrol typically prioritises refinement, diesel usually prioritises torque and long-run efficiency, and drivetrain options (2WD vs 4×4) change the vehicle’s character more than most features do.
| Powertrain detail | Tata Sierra | Mahindra Thar Roxx |
| Engine options | 1.5L naturally aspirated (NA) petrol (1498 cc) • 1.5L turbo-petrol (T-GDI) • 1.5L diesel | 2.0L turbo-petrol (mStallion, 1997 cc) • 2.2L diesel (mHawk, 2184 cc) |
| Transmission options | NA petrol: 6-speed MT / 7-speed DCT • Turbo-petrol (T-GDI): 6-speed AT • Diesel: 6-speed MT / 6-speed AT | Petrol: 6-speed MT / 6-speed torque-converter AT • Diesel: 6-speed MT / 6-speed torque-converter AT |
| Power | NA petrol: 108 PS Turbo-petrol (T-GDI): 160 PS Diesel: 118 PS . | Petrol: 162 PS (MT) / 177 PS (AT) Diesel: 152 PS (MT/AT lower tune) / 175 PS (AT higher tune) |
| Torque | NA petrol: 145 Nm • Turbo-petrol (T-GDI): 255 Nm • Diesel: 260 Nm (MT) / 280 Nm (AT) | Petrol: 330 Nm (MT) / 380 Nm (AT) • Diesel: 330 Nm (MT/AT lower tune) / 400 Nm (AT higher tune) |
| Mileage | Petrol automatic (ARAI-claimed): 29.9 kmpl • Mileage figures for other variants are not consistently listed in the same published data set. | ARAI-claimed: Petrol MT 12.4 kmpl • Petrol AT 12.4 kmpl • Diesel MT 15.2 kmpl • Diesel AT 15.2 kmpl |
The Thar Roxx is built to feel robust and capable, and it typically suits buyers who value torque, ground clearance confidence and the option of 4×4 on suitable variants. The Sierra is expected to be more road-biased, which usually means a more car-like driving experience for commuting and highway touring, but you should make the call only once the final engine and gearbox options are officially published.
Thar Roxx is the safer choice if you want a proven rugged powertrain with optional 4×4, while Sierra’s advantage will depend on its final, confirmed engine and gearbox mix.
Tata Sierra vs Mahindra Thar Roxx: Features & Comfort
Features matter when they improve daily comfort, not when they just add to the brochure. Screen usability, AC effectiveness in traffic, seat comfort, and convenience features like cameras and cruise control have the biggest real-world impact.
| Feature | Tata Sierra | Mahindra XUV700 |
| Infotainment system | 31.24 cm touchscreen (higher variants) | 26.03 cm touchscreen (AX7L) |
| Instrument cluster | 26 cm digital cockpit with navigation | 26.03 cm digital cluster |
| Music system | Premium JBL audio on higher variants (variant-wise) | 12-speaker Sony audio |
| Climate control | Dual-zone DATC (variant-wise) | Dual-zone climate control |
| Ventilated seats | Available on higher variants | Ventilated seats (1st row) |
| Adjustable steering | Tilt and telescopic | Tilt and telescopic |
| Drive modes / terrain modes | Terrain Modes: Normal, Wet & Rough | Drive Modes: Zip, Zap, Zoom |
| Sunroof | Panoramic sunroof (variant-wise) | Voice-assisted panoramic skyroof |
| Adjustable seats | Powered driver seat on higher variants | Powered front seats (variant-wise) |
| Rear AC vents | Yes | Yes (2nd row; 3rd row AC on 7-seater variants) |
| 60:40 rear seat split | Yes (variant-wise) | Seating layout varies by 6/7-seater configuration |
| Cruise control | Yes (variant-wise); ADAS-linked on higher variants | Yes (variant-wise) |
Also Read: Complete Buying Guide: Tata Sierra
Tata Sierra vs Mahindra Thar Roxx: Safety Features
Safety is best judged in two layers: crash-test performance (when officially published) and safety equipment (airbags, ESC, ISOFIX, cameras, ADAS). If an official crash-test rating exists for the exact model and variant family, it should carry more weight than simply counting airbags.
| Safety parameter | Tata Sierra | Mahindra Thar Roxx |
| GNCAP / Bharat NCAP safety rating | Bharat NCAP rating not published yet | Bharat NCAP 5-star (adult & child) |
| Airbags | 6 airbags | 6 airbags (standard) |
| ABS with EBD | Yes | Yes |
| ESC | Yes (ESP with safety aids) | Yes (ESC standard) |
| Traction control | Yes (TCS) | Yes (TCS) |
| Automatic headlamps | Available (variant-wise) | Available (variant-wise) |
| Rain-sensing wipers | Available (variant-wise) | Auto wiper (variant-wise) |
| Hill hold assist | Yes (HAC / HHC) | Yes (HHC) |
| Hill descent control | Yes (HDC) | Yes (HDC) |
| Rear sensors | Rear parking sensor; front parking sensor on higher variants | Parking sensors (variant-wise) |
| Rear parking camera | Rear camera; 360° camera on higher variants | Rear camera; 360° surround view on higher variants |
| ISOFIX | Yes | Yes / i-SIZE compatibility |
| ADAS | ADAS L2 / L2+ on higher variants | Level 2 ADAS (higher variants) |
Tata Sierra vs Mahindra Thar Roxx: Price Comparison
Price is where intent becomes obvious. The Sierra is expected to be positioned as a value-forward midsize SUV with a premium cabin feel. The Thar Roxx is a lifestyle SUV, and variants with bigger engines, automatics and 4×4 capability typically sit higher because the hardware costs more.
| Ex-showroom pricing | Tata Sierra | Mahindra Thar Roxx |
| Base variants | ₹11.49 lakh onwards (Smart+) | ₹12.39 lakh onwards (MX1 RWD Petrol MT) |
| Mid variants | ₹12.99 to ₹15.29 lakh (Pure to Adventure start) | ₹14.57 to ₹16.95 lakh (MX3 range incl. AT/diesel entries) |
| Upper mid variants | ₹15.29 to ₹17.99 lakh (Adventure start to Accomplished start) | ₹15.90 to ₹20.38 lakh (MX5 / AX5L incl. 4WD diesel AT entries) |
| Top variant | Up to ₹21.29 lakh (Accomplished Plus) | Up to ₹22.25 lakh (AX7L 4WD Diesel AT) |
If you want the most “SUV for the money” in a family sense, Sierra’s pricing will be the deciding factor. If you want rugged capability and the option of 4×4, you should expect to pay more for the right Thar Roxx variant, and the value is in capability rather than pure features-per-rupee.
Summary
Choose the Mahindra Thar Roxx if you want a rugged 5-door SUV with real rough-road intent, the option of 4×4 on suitable variants, and a character that prioritises durability and presence. Choose the Tata Sierra if you want a modern, comfort-focused 5-seater that’s likely to be more road-friendly and family-practical, but make the final call only after Tata officially confirms production specs, safety details, Sierra variants and the full price ladder.
Overall, if you are buying right now and want the least uncertainty, the Thar Roxx is the better SUV to consider because it is a known, on-sale package with clear variant-wise hardware choices. If you are comfortable waiting and you want a more premium, family-first daily SUV experience, the Sierra can be the better fit once its final details are officially confirmed.
FAQ about Tata Sierra vs Mahindra Thar Roxx
Q. Which one is better for city commuting?
The Tata Sierra is the better fit for most city buyers because it is positioned as a more comfort-focused midsize SUV, while the Thar Roxx leans more toward rugged capability. Tata has launched the Sierra as a road-oriented SUV, while Mahindra positions the Thar Roxx as a lifestyle SUV with stronger off-road hardware.
Q. Which one is better for off-road and bad roads?
Thar Roxx, especially if you choose a 4×4 variant, because it is built around rugged capability and rough-road hardware.
Q. Does the Thar Roxx come with 4×4?
Yes, 4×4 availability depends on the variant and powertrain combination.
Q. Should I wait for the Sierra or buy the Thar Roxx now?
Opt for the Tata Sierra if you want a newer, more urban-family SUV with a lower starting price. Buy the Mahindra Thar Roxx if you want a more rugged SUV with stronger off-road credentials and available 4WD. Tata lists the Sierra from ₹11.49 lakh, while Mahindra’s Thar Roxx lineup includes both 2WD and 4WD variants at higher price points depending on configuration.
Q. What should I prioritise while choosing variants?
Prioritise the drivetrain that matches your life first (2WD vs 4×4), then safety equipment (ESC, airbags, ISOFIX, cameras), then comfort features you will use daily (AC, seats, infotainment).
