XUV 3XO CNG vs Nexon iCNG vs Brezza S-CNG — Best CNG Compact SUV in India 2026

Why CNG Compact SUVs Suddenly Matter

For years, factory CNG was a hatchback and small-sedan story. That changed as buyers who wanted an SUV and hated the fuel bill found a middle path. In 2026 the compact SUV segment runs at roughly 30,000 vehicles a month, and within it, three models now offer a factory CNG option: the Maruti Suzuki Brezza S-CNG, the Tata Nexon iCNG, and, from 15 October, the Mahindra XUV 3XO CNG.

The logic is straightforward. CNG cuts running cost dramatically without asking you to plug in, and it sidesteps the range anxiety that keeps some buyers away from electric cars. But it comes with its own catches: a price premium, a fuel tank that can eat boot space, and a refuelling network that is dense in some cities and almost absent in others. This comparison sorts the three on the numbers that actually decide a purchase.

Model	Engine	CNG starting price (ex-showroom)	Claimed CNG efficiency
Mahindra XUV 3XO CNG	1.2-litre MPFI turbo-petrol (expected)	Around ₹9 lakh (expected)	To be announced
Tata Nexon iCNG	1.2-litre turbo-petrol	₹8.35 lakh	17.44 km/kg
Maruti Suzuki Brezza S-CNG	1.5-litre naturally aspirated petrol	₹9.30 lakh	26.9 km/kg

The Mahindra XUV 3XO CNG

Mahindra is the newcomer, and it is arriving late but with a clear advantage: it is the only one of the three whose model also offers diesel and electric power, giving buyers a full menu in one showroom. The CNG version is expected to use the 1.2-litre multi-point fuel injection turbo-petrol engine, the lower-output of the 3XO's two petrol units, adapted to run on gas. In petrol form that engine makes about 111hp and 200Nm, so the CNG version should feel reasonably lively once moving.

Mahindra has confirmed a panoramic sunroof and a front design close to its REVX range. Leaked images point to a twin-cylinder tank layout, which is the sensible choice because it preserves more luggage room than a single large cylinder. The 3XO carries a five-star Bharat NCAP rating, and its petrol range runs from ₹7.79 lakh to ₹15.04 lakh, so expect the CNG trim to land somewhere between ₹9 lakh and ₹10.5 lakh. That would make it the priciest of the three at entry level.

The Tata Nexon iCNG

Tata's claim to fame is being the first turbocharged CNG vehicle in India, and that matters. Where most CNG cars feel sluggish, the Nexon iCNG's turbocharged 1.2-litre engine delivers better mid-range punch, which shows up on highways and when the car is loaded. It also uses a twin-cylinder setup, so the boot stays usable. Prices start at ₹8.35 lakh and run up to ₹13.72 lakh ex-showroom, and the claimed efficiency is 17.44 km/kg.

The Nexon is also the cheapest way into a factory-CNG compact SUV, and it carries six airbags as standard plus a strong safety reputation. The trade-off is that its efficiency trails the Brezza by a wide margin, which matters over years of ownership. In plain terms, the Nexon asks you to trade a little running cost for a lot more driveability.

The Maruti Suzuki Brezza S-CNG

Maruti's pitch is efficiency, and on paper it wins comfortably. The Brezza S-CNG uses the larger 1.5-litre naturally aspirated K-Series engine and claims 26.9 km/kg, the best of the three and the most efficient variant in the entire Brezza line-up. The 2026 facelift brought a full price revision, with CNG variants now starting at ₹9.30 lakh for the LXi, ₹9.99 lakh for the VXi and ₹11.50 lakh for the ZXi, all ex-showroom.

The naturally aspirated engine makes the Brezza the smoothest of the trio in city traffic, though it lacks the turbo surge of the Nexon. Maruti's real advantage is its vast service network and the resale strength that comes with the brand, both of which count heavily in this segment. For a buyer who wants the lowest cost per kilometre and a car that is easy to live with and easy to sell later, the Brezza is the logical default.

Design and Features Compared

All three are modern, well-equipped compact SUVs, but they appeal to different tastes. The XUV 3XO is the most feature-forward of the trio, with its panoramic sunroof and a dashboard that leans into screens. The Nexon has the boldest exterior design and a strong safety-first image. The Brezza is the most conservative inside and out, which is exactly why it sells so consistently.

Feature	XUV 3XO CNG	Nexon iCNG	Brezza S-CNG
Sunroof	Panoramic (confirmed)	Panoramic (top trims)	Single-pane (top trims)
Airbags	6 standard	6 standard	6 standard
Crash rating	5-star Bharat NCAP	5-star Global NCAP	5-star Global NCAP
CNG tank layout	Twin-cylinder (reported)	Twin-cylinder	Single underfloor tank

The practical differences are smaller than the spec sheets suggest. All three protect the cabin with six airbags, and all three carry credible crash ratings. The XUV 3XO is the only one of the group that can also be bought as an EV or a diesel, which matters if you want the flexibility to change powertrain without changing model.

Safety and Ownership

Safety is now table stakes in this segment, and none of the three embarrasses itself. The XUV 3XO earned five stars for both adult and child protection under Bharat NCAP. The Nexon and Brezza both carry five-star Global NCAP scores, and the Nexon in particular has built its reputation on structural strength. On ownership, Maruti's service network is the largest by a distance, which lowers the friction of routine maintenance, while Tata and Mahindra have improved their networks substantially but still trail Maruti outside the big cities.

Running Cost: Where CNG Earns Its Keep

Running cost is the whole point of buying a CNG car, so let us put real numbers on it. Using Delhi's 14 October 2026 rates of ₹102.12 a litre for petrol and ₹86.98 a kg for CNG, and assuming a petrol SUV returns 15 kmpl while a CNG one returns 20 km/kg, the maths looks like this.

Fuel	Assumed efficiency	Cost per km	Monthly cost (1,500 km)
Petrol	15 kmpl	₹6.81	₹10,215
CNG	20 km/kg	₹4.35	₹6,525
Saving		₹2.46	₹3,690

That saving of roughly ₹3,690 a month is real but not dramatic. If the CNG variant carries a ₹1 lakh premium over an equivalent petrol model, the payback takes about 27 months at 1,500 km a month. Drive 2,000 km a month and it shortens noticeably; drive 800 km a month and it stretches past four years. The Brezza, with its higher efficiency, will pay back faster than the Nexon, which is why efficiency and not just the sticker price decides the value here.

Boot Space, Refuelling and the Real-World Catch

Both the Nexon and, reportedly, the XUV 3XO use twin-cylinder tanks, which is the modern answer to the old problem of a CNG cylinder swallowing the boot. Even so, expect some loss of luggage volume in every case. The bigger practical question is the pump. CNG infrastructure is concentrated in Delhi-NCR, Mumbai, Ahmedabad, Pune and a handful of other cities. Outside these, the fuel that looks cheapest on paper can be the hardest to find, which is why CNG is still an urban choice first.

Which One Should You Buy

If efficiency and low running cost are your priority, and you value a wide service network, the Maruti Suzuki Brezza S-CNG is the safest pick, and its 26.9 km/kg is the best number here. If you want the punchiest CNG drive and the lowest entry price, the Tata Nexon iCNG makes the strongest case, though it will cost more at the pump over time. If you want the newest car, a panoramic sunroof and the option of shopping petrol, diesel, electric and CNG under one roof, wait for the Mahindra XUV 3XO CNG and check its confirmed mileage and price before you commit.

What This Means for You

CNG is not automatically cheaper, it is cheaper if your driving profile and your city allow it. Work out your own monthly distance before you commit, then run the payback on our EMI calculator, check today's pump rates on our fuel price page, and line the three SUVs up on the Compare tool. If you live where CNG is scarce, a strong hybrid or an entry electric SUV may serve you better.

(Sources: Mahindra and Mahindra; Tata Motors; Maruti Suzuki price lists; Autocar India; The Hindu BusinessLine; Delhi fuel price references for 14 October 2026. Image credits: 2025 Mahindra XUV 3XO AX7L by LuvsMG481, CC BY-SA 4.0; 2023 Tata Nexon XZA+ by Dairokkan9, CC BY-SA 4.0; 2026 Maruti Brezza facelift, CC0; Maruti Suzuki Brezza front by Vis M, CC BY-SA 4.0.)

::KEY_NUMBERS:: Cheapest | Nexon iCNG from ₹8.35 lakh Best claimed mileage | Brezza S-CNG 26.9 km/kg Newest | Mahindra XUV 3XO CNG CNG running cost | about ₹4.35 per km ::TLDR:: India now has three factory-CNG compact SUVs: XUV 3XO CNG, Nexon iCNG and Brezza S-CNG The Nexon is the cheapest and the first turbocharged CNG in India The Brezza claims the best efficiency at 26.9 km/kg CNG saves roughly ₹2.5 to ₹3.5 per km over petrol, but only pays back if you drive enough and live near a pump ::CHART:: type: bar title: Claimed CNG efficiency (km/kg) labels: Brezza S-CNG,Nexon iCNG,XUV 3XO CNG (est.) values: 26.9,17.44,20.0 source: Manufacturer claims and estimate ::GLOSSARY:: km/kg | the unit for CNG fuel efficiency Twin-cylinder CNG | two smaller tanks that preserve more boot space S-CNG | Maruti's factory-fitted CNG system ::PULLQUOTE:: A CNG SUV only makes sense if you drive enough to earn back its premium, and if you live near a pump. ::POLL:: Which CNG compact SUV would you buy? || Mahindra XUV 3XO CNG || Tata Nexon iCNG || Maruti Brezza S-CNG ::SOURCES:: Mahindra and Mahindra, Tata Motors, Maruti Suzuki, Autocar India