Maruti Baleno CNG

CNG mileage and running cost

The Maruti Baleno CNG's headline number is its CMVR-certified mileage of 33.61 km/kg, tested under Rule 115 of the Central Motor Vehicles Rules 1989. This is among the highest certified figures in the premium hatchback segment and comfortably ahead of the petrol manual's 23.80 km/l. With CNG prices typically running 40–50% below petrol on a per-km basis in most Indian cities, the Baleno CNG can cut fuel costs by more than half compared with the petrol variant for a typical urban commuter.

Autocar India's independently measured real-world figure stands at approximately 26.51 km/kg, which is realistic for mixed city and highway use. Even at this real-world number, a full 55-litre (water equivalent) tank translates to a practical range of roughly 290–300 km on CNG before needing a refill — enough for most weekly commuting cycles without daily top-ups. The CNG premium over the equivalent petrol manual is ₹92,000 at each trim level, a gap that high-mileage users can recover in fuel savings within 18–24 months depending on their city's CNG price.

For context, the petrol AMT variant is certified at 24.77 km/l — the CNG's 33.61 km/kg figure is roughly 35% better on a certified basis, and the running cost advantage is even larger once fuel price differentials are factored in.

CNG kit, tank, and boot space

The Baleno CNG uses Maruti's proprietary S-CNG system, which is factory-fitted on the production line — not installed at the dealership. This matters for warranty: the full 3-year / 1,00,000 km manufacturer warranty applies without any exclusions related to the CNG fitment. The system features dual inter-dependent Electronic Control Units (ECUs), an intelligent injection system, and integrated wire harnesses designed specifically for the Z12E engine, ensuring seamless switching between CNG and petrol (gas) modes.

The CNG cylinder has a capacity of 55 litres (water equivalent), which is a meaningful tank for a hatchback. Maruti has not published a separate boot space figure for the CNG variant; the petrol Baleno's boot is rated at 318 litres (VDA method). As is typical for under-boot CNG installations, the cylinder occupies a portion of the boot floor, and buyers should verify usable luggage space at a dealership before purchase. The 60:40 split rear seat is retained on CNG variants, which helps with longer items.

The CNG variants are heavier than their petrol equivalents: kerb weight rises to 1,045–1,055 kg for the CNG MT, versus 950–985 kg for the petrol MT — an increase of roughly 70–95 kg attributable to the cylinder and associated hardware.

Performance on CNG

In CNG mode, the Z12E engine produces 51.3 kW (69.75 PS) at 5,700 rpm and 101.8 Nm at 2,900 rpm. Compared with petrol/gas mode (82.93 PS, 112.4 Nm at 4,500 rpm), this represents a reduction of about 13 PS and 10.6 Nm — a trade-off that is typical of factory CNG conversions. The torque peak in CNG mode arrives earlier (2,900 rpm vs 4,500 rpm), which actually aids low-speed city drivability.

Autocar India's review of the Baleno noted the engine feels slightly weak just before 2,000 rpm, with a more confident pull arriving around 4,000 rpm — this characteristic is more pronounced in CNG mode. For city commuting and moderate highway use, the performance is adequate; overtaking at highway speeds requires more planning than in the petrol variant. The 5-speed manual is the only gearbox available with CNG — there is no AMT option at launch, though user forum discussions suggest a CNG AMT variant may follow.

The Baleno CNG is front-wheel drive with MacPherson strut front suspension and a torsion beam rear, shared with the petrol variants. The additional weight of the CNG system does not noticeably alter the ride character, which Autocar India describes as a genuine strength at low speeds.

Cabin, space, and tech

Both CNG variants — Delta and Zeta — seat five and share the same 3,990 mm × 1,745 mm × 1,530 mm body on a 2,520 mm wheelbase. The cabin is positioned as a premium NEXA product, with a dual-tone theme and fabric upholstery on the Delta CNG. The Zeta CNG steps up to automatic climate control, rear AC vents, a 22.86 cm (9-inch) SmartPlay Pro+ touchscreen with wireless Apple CarPlay, wireless Android Auto, and 'Hi Suzuki' voice assist with barge-in capability, plus a wireless charging dock with active cooling.

The Zeta CNG also gains LED projector headlamps with NEXTrØ LED DRLs, 195/55 R16 alloy wheels (the Delta CNG runs 185/65 R15 steel wheels), and Suzuki Connect telematics — controllable via phone, smartwatch, or Alexa voice command. Both CNG variants include idle start-stop, electric rack-and-pinion power steering, and a 60:40 split rear seat. One notable omission across the entire Baleno range is a sunroof — no variant offers one.

User reviews highlight that rear headroom can feel tight for taller occupants, and the absence of a sunroof is a common complaint in the segment. The Zeta CNG's rear AC vents and larger alloys make it the more rounded package for family use.

Safety and ADAS

All Baleno variants, including both CNG trims, come with 6 airbags as standard — a segment-leading baseline. Additional safety equipment across the CNG range includes ABS with EBD, Electronic Stability Programme (ESP) with Hill Hold Assist, Tyre Pressure Monitoring System (TPMS), reverse parking sensors, and 3-point ELR seat belts for all occupants with pre-tensioners and force limiters. ISOFIX anchorages and Emergency Stop Signal are also standard.

Level 2 ADAS — comprising Adaptive Cruise Control with Curve Speed Reduction, Lane Keep Assist, Lane Departure Prevention and Warning, Advanced Emergency Braking (AEB for cars, motorcycles, pedestrians, and cyclists), Forward Collision Warning, and High Beam Assist — is exclusive to the petrol Alpha (O) variant and is not available on any CNG trim. Buyers who prioritise ADAS must choose petrol. The Baleno's platform sibling, the Toyota Starlet, scored 0 stars in a Global NCAP test (May 2026); the Baleno itself has not been rated by Bharat NCAP or Global NCAP as of September 2026.

CNG variants and pricing

The 2026 Maruti Baleno CNG is available in exactly two variants, both with a 5-speed manual gearbox:

Variant	Ex-showroom Price
Delta CNG MT	₹7.92 lakh
Zeta CNG MT	₹8.92 lakh

The CNG premium over the equivalent petrol manual is ₹92,000 at both trim levels. The Zeta CNG at ₹8.92 lakh is the better-value pick for most buyers, given the significant feature jump — automatic climate control, LED projector headlamps, 16-inch alloys, wireless smartphone integration, and Suzuki Connect telematics — over the Delta CNG. The Alpha and Alpha (O) trims are petrol-only.

How it compares

The Baleno CNG's closest factory-CNG rival in the premium hatchback space is the Tata Altroz CNG, which offers a twin-cylinder CNG setup that preserves more boot space but is priced similarly. The Toyota Glanza CNG is mechanically identical to the Baleno (same Z12E engine, same S-CNG system, same certified mileage) but is sold through Toyota dealerships at a slight premium and with Toyota's service network. The Glanza CNG does not offer the Baleno's NEXA-exclusive features like the SmartPlay Pro+ system with 'Hi Suzuki' voice assist.

Against the Hyundai Grand i10 Nios CNG and Hyundai Aura CNG, the Baleno CNG is larger, better-equipped, and more expensive — it targets buyers who want a premium feel alongside CNG economy. The Baleno CNG's 33.61 km/kg certified figure is higher than most rivals in the segment, and the factory-fitment warranty coverage is a meaningful differentiator over dealer-fitted alternatives.

Who should buy it

The Maruti Baleno CNG is best suited to buyers who cover 1,200 km or more per month, live in a city or town with reliable CNG infrastructure, and want a premium NEXA product without paying petrol running costs. The Zeta CNG at ₹8.92 lakh is the sweet spot — it adds automatic climate control, wireless smartphone integration, and 16-inch alloys over the Delta, and the ₹1 lakh step-up is easy to justify. The Delta CNG makes sense only for buyers on a strict budget who primarily want the lowest possible running cost.

Buyers who need an automatic gearbox, Level 2 ADAS, ventilated front seats, a 360-degree camera, or a head-up display must look at the petrol range — none of these features are available on CNG variants. Similarly, those who regularly carry bulky luggage should verify boot space with the CNG cylinder fitted before committing.