A comparison between two of India’s premier high-capacity electric vehicles.
The upper tier of India’s electric mid-size SUV segment offers two credible options: the Tata Sierra EV (75 kWh) and the Mahindra BE 6 (79 kWh). Tata’s Sierra EV is a rugged, spacious SUV with both rear-wheel-drive and dual-motor all-wheel-drive configurations, starting at ₹22.19 lakh. The Mahindra BE 6, in contrast, is a dedicated born-electric coupe SUV constructed on the INGLO platform, priced from ₹25.20 lakh.
Here, we have taken a closer look at whether you want the upright family cabin and dual-motor AWD traction of the Sierra EV, or the 175-180 kW ultra-fast DC charging and futuristic styling of the BE 6. This piece compares the powertrains fitted across these two vehicles, the technological features they come bundled with and the clear difference in their off-road capability and grand touring credentials.
Dimensions, Stance and Cargo Practicality
The Tata Sierra EV has 622 litres of rear boot space alongside a 55-litre frunk, delivering 177 litres more combined cargo capacity than the Mahindra BE 6.
| Dimensions and Practicality | Tata Sierra EV (75 kWh) | Mahindra BE 6 (79 kWh) |
| Length | 4,340 mm | 4,371 mm |
| Width | 1,841 mm | 1,907 mm |
| Height | 1,750 mm | 1,627 mm |
| Wheelbase | 2,730 mm | 2,775 mm |
| Ground Clearance (Unladen) | 205 mm | 207 mm |
| Rear Boot Volume | 622 litres | 455 litres |
| Front Trunk (Frunk) Volume | 55 litres | 45 litres |
| Turning Circle Diameter | 10.6 metres | 10.0 metres |
| Standard Wheel Hardware | R19 Alloy Wheels | R19 Alloy / R20 Alloy Wheels |
The Tata Sierra EV has an upright SUV body, standing about 123 mm taller than the BE 6. This vertical glasshouse design offers high passenger headroom and large window apertures. And with 205 mm of ground clearance, it handles rough rural terrain and high water obstacles with little risk to its underbody.
The Mahindra BE 6 has more of an aerodynamic coupe design. Built on the INGLO skateboard architecture, it measures 4,371 mm in length and 1,907 mm in width, i.e., longer and wider than the Sierra EV. The 2,775 mm wheelbase also provides greater rear legroom.
While the Sierra EV offers a relatively bigger cargo area and higher headroom, the BE 6’s cabin remains wider and overall more accommodating for its occupants.
Powertrain: Dual-Motor AWD vs High-Output RWD
The Sierra EV Empowered AWD A 75 features a dual-motor setup generating 504 Nm of torque and a 5.8-second 0 to 100 kmph sprint. Meanwhile, the BE 6 79 kWh delivers 282 bhp through a dedicated high-performance rear-wheel-drive system.
| Specifications | Tata Sierra EV (75 kWh RWD / AWD) | Mahindra BE 6 (79 kWh) |
| Battery | 75 kWh (Liquid-Cooled Pack) | 79 kWh (LFP Chemistry) |
| Drivetrain | Rear-Wheel Drive (RWD) or All-Wheel Drive (AWD) | Strictly Rear-Wheel Drive (RWD) |
| Motor | Single PMSM (RWD) / Dual PMSM Motors (AWD) | Single 3-in-1 Integrated PMSM (Rear Axle) |
| Power | 206 bhp (RWD) / 306 bhp (AWD) | 210 kW (282 bhp / 286 PS) |
| Torque | 315 Nm (RWD) / 504 Nm (AWD) | 380 Nm |
| 0 to 100 kmph | 5.8 seconds (AWD in Boost Mode) | 6.7 seconds |
| Certified Range (ARAI / MIDC) | Up to 665 km | 683 km |
| Real-World Range (Estimated) | Approx 480 to 510 km | Approx 490 to 520 km |
| Multi-Terrain Hardware | 6 Modes (Normal, Grass/Snow, Mud/Ruts, Sand, Rock Crawl, Custom) | Multi-Drive Modes with Off-Road calibrations |
Tata offers the Sierra EV 75 kWh in two mechanical formats: a 206 bhp rear-wheel-drive setup or a flagship dual-motor all-wheel-drive system on the Empowered AWD A trim. The AWD version combines front and rear permanent magnet synchronous motors, offering around 306 bhp and 504 Nm of torque.
Mahindra offers the BE 6 79 kWh only with a rear-mounted 3-in-1 electric powertrain producing 210 kW (282 bhp) and 380 Nm of torque. Its suspension uses semi-active Frequency Dependent Damping (FDD) with MTV-CL valving paired with an independent 5-link rear suspension.
Overall, even though the Sierra EV AWD provides all-weather off-road security, the BE 6 provides more focused rear-wheel-drive chassis engagement.
Charging Architecture, Battery Tech and Energy Export
The Mahindra BE 6 79 kWh supports up to 180 kW DC fast charging to complete a 20 to 80 per cent charge in 20 minutes, while the Sierra EV 75 kWh has 3.3 kVA Vehicle-to-Load and 5.0 kVA Vehicle-to-Vehicle power sharing.
| Features | Tata Sierra EV (75 kWh) | Mahindra BE 6 (79 kWh) |
| Battery Chemistry | Liquid-Cooled Lithium-ion | BYD Blade-Derived LFP Cells |
| DC Fast-Charging Rate | 120 kW (CCS2) | 180 kW (CCS2) |
| DC Fast-Charge Time (20 to 80%) | 26 minutes | 20 minutes |
| AC Charging | Paid 7.2 kW Wallbox Charger | Paid 11.2 kW AC Wallbox Charger |
| AC Full Charge Time (0 to 100%) | Approx. 8.5 to 10.5 hours | Approx. 8.0 hours (via 11.2 kW AC) |
| Vehicle-to-Load (V2L) | 3.3 kVA AC (Standard) | Not Available |
| Vehicle-to-Vehicle (V2V) | 5.0 kVA AC (Standard) | Not Available |
The Mahindra BE 6 79 kWh takes full advantage of its INGLO architecture, accommodating up to 180 kW DC fast charging. When connected to a compatible ultra-fast highway charger, the 79 kWh pack charges from 20 to 80 per cent in just 20 minutes.
Conversely, the Tata Sierra EV 75 kWh supports a peak DC charging of 120 kW, requiring 26 minutes for a 20 to 80 per cent replenishment. Tata offers dedicated ACFC (AC Fast Charger) variants across the lineup for a ₹49,000 premium to bundle fast home hardware.
One area the Sierra EV excels in is its bi-directional power utility: standard V2L functionality delivers up to 3.3 kVA of AC power to run campsite appliances or tools. Also, its 5.0 kVA V2V capability allows the Sierra to jump-charge stranded electric vehicles.
Overall, the BE 6 reduces highway charging downtime, whereas the Sierra EV can act as an off-grid mobile power station when needed.
Cabin Architecture, Infotainment Displays and Safety Suites
Both flagship SUVs feature expansive triple-screen dashboards and Level 2 ADAS.
| Features | Tata Sierra EV (75 kWh) | Mahindra BE 6 (79 kWh) |
| Dashboard Display | Horizon View Triple Screen Experience | Coast-to-Coast Triple HD Screens (12.3-inch each) |
| Head-Up Display | HypAR HUD with Multicolour AR Guides | Augmented Reality Head-Up Display (AR HUD) |
| Audio | 12-Speaker JBL Audio with 13 Dedicated Sound Modes | 16-Speaker Harman Kardon Sound with Dolby Atmos |
| In-Car Entertainment | Arcade. ev Suite (30+ Apps) and Airconsole™ | MAIA Snapdragon 8295 OS with 5G and Video Calling |
| Front Seating | Ventilated Front Seats, 6-Way Power Driver Seat | Ventilated Front Seats, 6-Way Power Driver Seat |
| Airbags | 6 Airbags (Adventure/Empowered) | 7 Airbags (Includes Driver Knee Airbag) |
| Level 2 ADAS | Camera + Radar Suite on Empowered A / AWD | 5 Radars + 1 Vision Camera Suite (Four Trims) |
The Tata Sierra EV features the Horizon View Triple Screen Infotainment Experience over its dashboard, offering digital instrumentation, central navigation and a passenger media screen. Front passengers can check out the Arcade.ev suite with over 30 applications. It supports casual gaming as well. And safety-wise, you get a Level 2 ADAS suite.
So does the Mahindra BE 6, with its Level 2 ADAS offering auto-park assist, remote summon and a 540-degree surround-view camera. The cabin also gets a Coast-to-Coast triple 12.3-inch HD screen layout powered by the MAIA operating system. But Mahindra’s offering gets an extra driver knee airbag in its safety kit.
Variant Distribution, Pricing Hierarchy and Running Costs
The 75 kWh version of the Sierra EV comes in 8 variants.
| Variant Name | Ex-Showroom Price |
| Sierra EV Adventure 75 | ₹22.19 Lakh |
| Sierra EV Adventure 75 ACFC | ₹22.68 Lakh |
| Sierra EV Empowered 75 | ₹23.79 Lakh |
| Sierra EV Empowered 75 ACFC | ₹24.28 Lakh |
| Sierra EV Empowered A 75 | ₹24.79 Lakh |
| Sierra EV Empowered A 75 ACFC | ₹25.28 Lakh |
| Sierra EV Empowered AWD A 75 | ₹25.99 Lakh |
| Sierra EV Empowered AWD A 75 ACFC | ₹26.48 Lakh |
The BE 6 has a relatively shorter list for its 79 kWh variants.
| Variant Name | Ex-Showroom Price |
| BE 6 FE 79kWh – R20 | ₹25.20 Lakh |
| BE 6 Three+ 79kWh – R19 | ₹25.70 Lakh |
| BE 6 Four 79kWh – R19 | ₹27.70 Lakh |
| BE 6 FE Four 79kWh – R20 | ₹27.70 Lakh |
| BE 6 Launch Edition 79kWh – R19 | ₹27.70 Lakh |
Note: The Tata Sierra EV Adventure 75 starts at ₹22.19 lakh, undercutting the most accessible Mahindra BE 6 79 kWh (FE at ₹25.20 lakh) by ₹3.01 lakh.
Regarding running costs, both vehicles draw roughly 85 to 90 kWh from domestic meters for a full charge, with real-world ranges near 500 km. At ₹8 per unit of electricity, home charging expenses average ₹1.35 to ₹1.45 per kilometre for both.
AutoYugg Verdict: Tata Sierra EV 75 kWh or Mahindra BE 6 79 kWh?
The Tata Sierra EV 75 kWh is the pragmatic, versatile investment for those who have to deal with different road environments on a daily basis. With an upright cabin, high rear passenger headroom, a 622-litre boot and 205 mm of ground clearance, it fulfils the traditional SUV brief without any compromise. Combined with factory V2L and V2V power export and an accessible starting price of ₹22.19 lakh, the Sierra EV offers more practical utility.
But the Mahindra BE 6 79 kWh is the more sensible vehicle for buyers who want cutting-edge performance, striking road presence and highway touring efficiency. Supported by an optional 11.2 kW home charger, 7 airbags and a 16-speaker Harman Kardon Dolby Atmos sound system, it offers an immersive driving experience.
Get the Tata Sierra EV if you want dual-motor AWD traction and higher cargo volume. Choose the Mahindra BE 6 instead if you want your vehicle to have high-speed dynamics and a more digitally rich cabin.
