Tata Altroz CNG

CNG mileage and running cost

The Tata Altroz iCNG carries an ARAI-certified mileage of 26.2 km/kg in CNG mode. Real-world usage, as reported by multiple sources, typically falls in the range of 20–23 km/kg in city conditions and 24–26 km/kg on highways — still comfortably ahead of petrol-only rivals. With CNG prices in most Indian cities hovering around ₹75–90 per kg, the per-kilometre running cost works out to roughly ₹3.0–3.5, compared to ₹7–8 for the petrol variant at current fuel prices.

For a buyer covering 1,500 km per month primarily on CNG, the monthly fuel saving over the petrol version can exceed ₹5,000–6,000, meaning the CNG premium over the equivalent petrol trim is typically recovered within 18–24 months. The bi-fuel nature of the iCNG means you are never stranded: the car starts directly in CNG mode and switches to petrol automatically when the CNG runs low, with no manual intervention needed.

The CNG tank capacity is 60 litres (water equivalent), which translates to a practical CNG range of roughly 350–400 km on a full fill at real-world efficiency — adequate for most urban and semi-urban use cases before needing a top-up.

CNG kit, tank, and boot space

The iCNG system is factory-fitted by Tata Motors on the production line, not retrofitted at the dealership. This means the full manufacturer warranty applies without any asterisks, and the kit is integrated with the car's single advanced ECU for seamless petrol-CNG switching. A dedicated CNG button sits on the right-hand side of the steering wheel.

Tata's twin-cylinder setup is the key differentiator: instead of a single large cylinder eating into the boot floor, two smaller cylinders are mounted under the boot floor in a cradle structure. This preserves 210 litres of usable boot space in CNG mode — the petrol/diesel figure is 345 litres, so there is a reduction, but 210 litres is still enough for a week's grocery run or a couple of cabin-sized trolleys. The spare wheel is mounted underneath the car and is accessible by loosening a bolt inside the boot.

Safety provisions for the CNG system include a fire extinguisher, an automatic switch to petrol if a gas leak is detected, and a system that cuts CNG supply and vents gas safely in the event of a fire. The cylinders sit in a crash-tested cradle designed to prevent intrusion into the passenger compartment.

Performance on CNG

In CNG mode, the 1.2-litre Revotron engine produces 74 hp and 103 Nm — down from 88 hp and 115 Nm on petrol, a reduction typical of CNG conversions due to the lower calorific value of the fuel. In practice, Autocar India's review noted that the engine does not feel strained on CNG, and most drivers will be comfortable leaving it in CNG mode for the majority of their driving.

To compensate for the additional weight of the twin-cylinder setup (approximately 150–200 kg over the petrol variant), Tata Motors has stiffened the rear suspension by around 15%. The ride remains composed and comfortable, particularly at higher speeds, though it is perceptibly firmer at low speeds over sharp bumps compared to the petrol Altroz.

The May 2026 addition of an AMT (Automated Manual Transmission) to the iCNG lineup is a genuine segment-first — no other premium CNG hatchback in India offers an automatic option. The AMT is available on the Pure, Pure S, Creative, Creative S, and Accomplished S CNG trims, making stop-and-go city driving significantly less tiring. The 0–100 km/h time is approximately 12.8 seconds in CNG mode, which is adequate for urban use.

Cabin, space, and tech

The All New Altroz generation brings a substantially upgraded interior called the Grand Prestigia Dash — a 3-tone dashboard with soft-touch painted finishes, a Smart Digital Steering Wheel with subtle illumination, and a CentraLuxe Console with a centre armrest. The Executive Lounge Rear Seats feature extended under-thigh support, and Galaxy Ambient Lighting is available on higher trims.

Higher CNG variants (Creative S CNG and Accomplished S CNG) get the Ultra View 26.03 cm (10.25-inch) HD infotainment system by HARMAN with Android Auto and Apple CarPlay, paired with a 10.25-inch digital driver's display. A voice-assisted electric sunroof — a segment-first for a CNG hatchback — is available on select trims, as is a wireless charger and a 360° HD Surround View System. The cabin is five-seat, and rear legroom is described by reviewers as adequate for average Indian adults, with three adults fitting across the rear bench.

Flush door handles, Grand Entry 90° opening doors, Infinity Connected LED tail lamps, twin LED headlamps with DRLs, LED fog lamps, and new Diamond Cut R16 alloy wheels (on higher trims) give the exterior a premium presence that stands apart from more utilitarian CNG rivals.

Safety and ADAS

The Tata Altroz holds a 5-star Bharat NCAP rating — the highest available — and this rating applies to the petrol, diesel, and CNG versions alike. It is built on the ALFA Architecture with Ultra High Strength Steel (UHSS), which provides a stiff, energy-absorbing body structure.

Standard safety equipment across all variants includes 6 airbags, Electronic Stability Program (ESP), ISOFIX child seat anchor points, TPMS (Tyre Pressure Monitoring System), rear defogger, rain-sensing wipers, and an SOS Calling Function (E-Call/B-Call). Higher trims add a 360° HD Surround View System, auto headlamps, and LED fog lamps. The Altroz does not offer a full ADAS suite (like autonomous emergency braking or lane-keep assist) in the conventional sense, but the 360° surround view and ESP provide meaningful active safety support.

CNG variants and pricing

The Altroz iCNG is available in six trims, with both manual and AMT options on five of them. Ex-showroom prices (as of September 2026) are:

Variant	Transmission	Price (ex-showroom)
Smart CNG	5MT	₹7.30 lakh
Pure CNG	5MT	₹8.15–8.20 lakh
Pure CNG AMT	AMT	₹8.69 lakh
Pure S CNG	5MT	₹8.45–8.50 lakh
Pure S CNG AMT	AMT	₹8.99–9.00 lakh
Creative CNG	5MT	₹9.05 lakh
Creative CNG AMT	AMT	₹9.57 lakh
Creative S CNG	5MT	₹9.40 lakh
Creative S CNG AMT	AMT	₹9.82 lakh
Accomplished S CNG	AMT	₹10.77 lakh

The Smart CNG is the entry point and the only trim without an AMT option. The Accomplished S CNG tops the range at ₹10.77 lakh and is AMT-only at this trim level.

How it compares

The Altroz iCNG's closest CNG rivals are the Maruti Baleno CNG (claimed 30.61 km/kg, ₹8.99–9.64 lakh) and the Toyota Glanza CNG (same powertrain as Baleno CNG). The Baleno CNG edges ahead on claimed mileage, but it uses a single-cylinder setup that significantly reduces boot space and does not offer an AMT. The Altroz counters with its 5-star Bharat NCAP rating (the Baleno has not been tested under Bharat NCAP), 6 standard airbags, the twin-cylinder under-floor layout preserving 210 litres of boot, and the segment-exclusive CNG-AMT combination.

The Tata Tiago iCNG (claimed 26.49 km/kg MT, 28.06 km/kg AMT) is cheaper but is a smaller, less premium car with fewer features and a lower safety rating. The Hyundai Grand i10 Nios CNG is similarly positioned below the Altroz in terms of size and features. For buyers who want a CNG hatchback with genuine premium credentials and the peace of mind of a 5-star crash rating, the Altroz iCNG has no direct equivalent.

Who should buy it

The Tata Altroz iCNG is best suited to urban and semi-urban buyers who cover 1,200–2,000 km per month and want to cut fuel costs without sacrificing safety ratings or cabin quality. The CNG-AMT variants are particularly well-suited to buyers in congested cities who find clutch-heavy driving fatiguing. Families with young children will appreciate the 6 standard airbags, 5-star NCAP rating, and ISOFIX points as non-negotiable safety features.

Buyers who regularly carry bulky luggage or need the full 345-litre boot should consider the petrol or diesel Altroz instead, as the 210-litre CNG boot is a real-world constraint. Similarly, buyers who frequently travel on highways where CNG stations are sparse may find the bi-fuel flexibility reassuring but should plan fill-up stops carefully. For everyone else — the safety-conscious, the cost-conscious, and the feature-hungry — the Altroz iCNG makes a compelling case as the most complete CNG hatchback in India today.