Tata Sierra CNG is reportedly in the works, with a similar plan for the Curvv too, both expected to sit above the Nexon in Tata's CNG lineup. That's worth knowing if you're shopping in this segment, since right now only the Maruti Suzuki Grand Vitara, Victoris and Toyota Hyryder offer CNG here, and a Sierra CNG would actually give buyers a combination of size, practicality as well as lower running costs that just doesn't exist in the market yet. Here's a realistic look at the timeline, engine setup and pricing you should actually expect, based on what Tata's said before and how it's handled CNG on its other cars.
When Can Buyers Expect The Tata Sierra CNG To Launch?
Nothing's confirmed officially, but a Diwali 2026 launch window keeps coming up, which would actually line up well with the festive-season
demand bump CNG vehicles usually get. Tata had already flagged a Sierra CNG as something it's working on, separate from the Sierra AWD that's also in the pipeline.
The Tata Sierra sales have been sitting somewhere between 6,000 and 9,000 units a month since launch, averaging around 7,400 a month, along with a CNG option should push that number up further, given how much CNG demand has grown among Indian SUV buyers lately.
What Engine, Tank Setup, And Features Are Expected?
It's more likely the CNG version pairs with the Sierra's 1.5-litre naturally aspirated petrol engine rather than the turbo, since Tata's other CNG models stick to that same pattern of avoiding higher-output engines. You can expect Tata's usual twin-cylinder i-CNG setup here too, two smaller tanks instead of one big one, which eats into less boot space than the single-tank layouts some rivals use.
Tata's other CNG cars still come with a spare wheel, so there's a decent chance the Sierra CNG keeps that too, something not every CNG SUV manages. Seamless switching between CNG and petrol along with barely noticeable power loss on gas, should carry over as standard as well.
Will The Sierra CNG Cost More Than The Regular Model?
Nothing's surfaced on pricing yet, but Tata's usually kept its CNG variants priced close to the equivalent petrol trim rather than treating CNG as some separate premium tier. If that holds true here too, the Sierra CNG should just slot into the existing price range instead of pushing costs up meaningfully, which makes it an easy upgrade path for anyone who was already going to pick the standard petrol Sierra.
