Maruti Brezza 2026 CNG Variant: Tank, Boot Space Impact, Efficiency

CNG buyers have put up with a real compromise for years, a boot-mounted cylinder that ate into luggage space just when you needed it most, like on a family road trip. The 2026 Brezza facelift finally addresses this directly with a redesigned underbody CNG tank. Here’s exactly what changed, what it means for your boot space, and what mileage to actually expect.

What Changed: From Boot-Mounted to Underbody

The outgoing Brezza CNG used a conventional boot-mounted cylinder, a 55-litre tank that occupied nearly half the car’s total luggage space. It was functional but genuinely limiting, especially for buyers who needed the boot for both CNG range and everyday cargo at the same time.

The 2026 facelift replaces this with an underbody-mounted tank, technology borrowed directly from the Maruti Victoris, where it debuted in 2025. The cylinder is now mounted externally beneath the rear chassis rather than sitting inside the boot, freeing up the full luggage compartment for actual use.

Tank Capacity

The new underbody CNG tank has a capacity of 55 litres water equivalent, matching the outgoing car’s tank size. This is worth noting because the boot-space improvement here comes entirely from repositioning the tank, not from shrinking it. You’re not trading capacity for practicality, you get to keep the same CNG range while regaining the boot space that used to be sacrificed for it.

For comparison, the Tata Nexon’s CNG variant uses a dual-cylinder setup with a combined 60-litre water equivalent capacity, marginally larger than the Brezza’s single-tank design. Despite the smaller tank, Maruti’s engineering and ARAI-certified efficiency numbers put the Brezza ahead of the Nexon on outright mileage per kilogram, covered in more detail below.

Boot Space: What You Actually Get Back

This is the headline benefit. With the underbody tank design, the Brezza CNG preserves the full 328-litre boot space that petrol variants offer. On the outgoing car, the boot-mounted cylinder occupied close to half of the available luggage area, a genuine daily-use compromise that pushed some CNG-interested buyers toward petrol instead, purely for practicality reasons.

With this change, CNG buyers no longer have to choose between lower running costs and a usable boot. You can fit a full set of luggage for a family trip, a stroller, or weekly grocery hauls without the CNG tank eating into that space the way it used to. This is arguably the single biggest practical upgrade in the entire 2026 Brezza facelift for CNG-specific buyers, more impactful day to day than the new turbo engine is for petrol buyers.

Efficiency: ARAI Figures and What to Expect in Real Driving

The Brezza CNG carries an ARAI-certified mileage of 26.90 km/kg. This is a certified test-cycle figure, not a guarantee of real-world performance, actual mileage will vary based on driving style, traffic conditions, air conditioning use, and vehicle load, the same factors that affect any fuel type’s real-world efficiency versus its official rating.

That said, 26.90 km/kg is a strong number for the segment. It comfortably beats the Tata Nexon CNG’s ARAI-rated efficiency, despite the Brezza’s tank being smaller in water-equivalent capacity. For buyers whose priority is minimizing running cost per kilometre, this efficiency advantage compounds meaningfully at high monthly mileage.

Keep in mind that CNG mode reduces the engine’s power output compared to running on petrol. The 1.5-litre engine makes less power and torque on CNG than it does in petrol mode, a normal characteristic of factory-fitted CNG systems generally, not something unique to the Brezza. Acceleration and highway overtaking will feel noticeably less eager on CNG than on petrol, a trade-off that comes with the running-cost benefit.

Who Should Actually Choose the CNG Variant

CNG makes the strongest financial sense for buyers covering roughly 1,500-2,000 km or more per month, fleet operators, ride-hailing drivers, or anyone with a genuinely high daily commute. At that kind of usage, the fuel-cost savings over petrol compound quickly enough to offset the reduced power output within a reasonable ownership period.

For buyers with lower monthly running, the calculation is less clear-cut. The reduced power on CNG mode and the manual-only gearbox restriction (there’s no automatic CNG option on the Brezza) are real trade-offs that matter more if you’re not covering enough distance to make the fuel savings decisive. In that case, weighing CNG specifically against the naturally aspirated petrol’s own running costs is worth doing before committing.

CNG Variant Limitations to Know Before Buying

A few restrictions apply specifically to the CNG variant that are worth knowing upfront. CNG is available only with the 1.5-litre engine, paired exclusively with the 6-speed manual gearbox, there’s no automatic CNG option, and no CNG on the Boosterjet turbo-petrol either. CNG is also not available on the range-topping ZXi+ trim at all, if you want the top-spec Brezza with all its features, CNG simply isn’t offered at that trim level, only LXi, VXi, and ZXi get the CNG option.

Frequently Asked Questions