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Tata Sierra set to return as an EV

By Himanshu Walia | Published: 11 Jan' 22 | Updated: 14 Jan' 22

Tata Sierra

Image Source: Tata Motors

Exhilarated by the success of the Tata Nexon EV, which has propelled Tata Motors to first place in the Indian electric vehicle market, the Tata company is launching an aggressive campaign of electric vehicles. 


Tata Motors has declared it'll have a 10-EV lineup in the coming five years after establishing a new electric vehicle company, TPEML, and allocating a Rs 15,000 crore product development war chest to the venture.


The all-new Tata Sierra, which debuted in concept form at the 2020 Auto Expo, is perhaps the most crucial of these and has been the subject of the most speculation since its appearance. 


According to our sources, Tata Sierra has now been given the go-ahead for manufacturing. What makes it so notable is that it will be Tata's first stand-alone electric vehicle (EV) and the first to be built on the company's new 'Born Electric' platform. 


Here are some of the most important things you should know about the Tata Sierra.

No petrol or diesel options for Tata Sierra

The yesteryear readers may recall that the Sierra was Tata Motors' first true SUV and that it was introduced in 1998.  


The Tata Sierra car had a unique three-door layout as well as an iconic aesthetic element in the form of large (non-openable) back windows that arched upwards into the roof, which made Tata Sierra stand out from the crowd. 


A pick-up truck platform served as the foundation for the Tata Sierra, which was propelled by a 2.0-liter diesel engine (at first normally aspirated, later turbocharged) and offered the option of four-wheel drive.


However, aside from the nostalgic nameplate, the new Tata Sierra will have just a few similarities with the original, with the exception of a few design cues that may pay respect to the original Tata Sierra. 


The diesel engine option will be skipped in the Tata Sierra, in fact, there will be no combustion engine at all in the future, ever. 


The new Tata Sierra will be a born-electric vehicle, which means that it will be designed from the ground up as an electric vehicle, with no choice for traditional petrol or diesel engine, due to its new Sigma platform, which will not be able to accept an internal combustion engine. 


Contrary to the original Tata Sierra EV's three-door layout and the unique 'four-door' design (one driver's side door, two on the passenger's side) of the 2020 concept, sources have told us that the production of Tata Sierra EV will have a traditional five-door layout instead of the original's three doors.

What is the Sigma platform, and how does it work?

When compared to Tata's current electric vehicles, which are built on the same architecture as their petrol & diesel-powered equivalents, albeit with modifications to fit batteries and motors, the Tata Sierra EV will be built on a specifically designed electric vehicle platform. 


The new Sigma platform, which is built on the X4 or ALFA architecture used by the Tata Altroz and Tata Punch, has been extensively re-engineered all-around battery pack in order to prevent any compromises and to maximize packing space.


These alterations in the Tata Sierra will include the removal of the gear tunnel, adjustments to the area that would have served as the fuel tank, and the side members being pushed to the sides to make room for the new transmission tunnel and fuel tank. 


In addition, these modifications in the Tata Sierra may allow the Sigma platform to shed a lot of weight, save more energy, and be more spacious than ICE platform-based electric vehicles (EVs). 


As a result of these modifications, the platform will no longer be able to accommodate internal combustion engines and their auxiliary components; however, Tata's ALFA and OMEGA architectures will be able to meet these needs.

The new Tata Sierra Launch Date

While The Tata Sierra development may already be beginning, the Tata electric SUV is still some time away from making its debut on the market, which is not expected to happen until at least 2025. 


While there are at least six models planned, the ones that would be launched before the Tata Sierra will be built on the existing ICE platforms or would be enhanced versions of existing models, as previously stated. 


Expect future models on the Sigma platform beyond the Tata Sierra, as well as larger variants that would compete with the Tata Harrier and Tata Safari in terms of size and performance.