CNG Surges Past Diesel, Now Fuels Nearly One in Four Cars

While the electric vehicle narrative commands headlines, a quieter but arguably more consequential shift has been unfolding in India's passenger vehicle market. CNG's share of PV retail climbed to 21.98 per cent in FY 2025-26, up from 19.60 per cent in FY25 — and in March 2026, the monthly reading hit 23.76 per cent. Nearly one in four passenger vehicles sold in India now runs on compressed natural gas.

To put that in absolute terms: of the 47,05,056 PVs retailed in FY26, approximately 10.34 lakh were CNG vehicles. This makes CNG a larger powertrain category than diesel (18.08 per cent share) and nearly five times the size of the EV segment (4.25 per cent) in the PV space.

The trajectory is unmistakable. PV CNG share has expanded from roughly 12-13 per cent three years ago to nearly 22 per cent today, and the March reading of 23.76 per cent suggests the fiscal-year average for FY27 could well cross 25 per cent. At the same time, petrol's share has been retreating steadily: from 50.82 per cent in FY25 to 47.48 per cent in FY26, with the March reading dropping to 44.81 per cent. Diesel has held broadly flat at around 18 per cent.

Several forces are converging to drive the CNG expansion.

First, the economics are compelling. CNG fuel costs roughly 40-50 per cent less than petrol per kilometre, and the upfront premium for a factory-fitted CNG variant over its petrol equivalent has narrowed to Rs 80,000-1,00,000 for most mass-market models. For a buyer doing 15,000-20,000 km annually, the payback period is under 18 months — a straightforward calculation that an increasing number of Indian buyers are making.

Second, the supply-side push has intensified. Maruti Suzuki, which pioneered factory CNG in India, has expanded CNG options across virtually its entire portfolio — from the Alto and WagonR to the Brezza and Ertiga. Tata Motors has joined aggressively: its CNG volumes crossed 1.72 lakh units in FY26 (+24 per cent), with CNG variants now available on the Nexon, Punch, Tiago and Altroz. Hyundai offers CNG on the Grand i10 Nios, Aura and Venue. The result is that a buyer considering a CNG vehicle today has a range of options from Rs 5 lakh to Rs 15 lakh across hatchbacks, sedans and compact SUVs.

Third, the infrastructure has expanded. City gas distribution networks have spread from roughly 300 cities three years ago to over 600 today, covering most of the high-population northern and western belt where PV density is highest.

Fourth — and this is where the West Asia crisis becomes relevant: — fuel price anxiety is accelerating the shift. FADA's dealer survey shows 36.5 per cent of dealers reporting that rising or expected fuel prices are affecting customer purchase decisions, and 56.9 per cent reporting accelerating interest in CNG and EV options. Elevated petrol prices don't suppress demand — they redirect it.

The CNG story is not limited to PVs. Commercial vehicle CNG share stood at 11.79 per cent for FY26 (11.20 per cent in March), driven by urban freight and last-mile delivery applications where CNG's cost advantage over diesel is even more pronounced.

The competitive implications are significant. Maruti Suzuki's early and deep investment in CNG is one reason its 39.71 per cent PV retail share has proved resilient even as SUV-focused rivals have gained ground in the broader market. Tata's CNG push — 1.72 lakh units represents roughly 27 per cent of its domestic volumes — has been a key enabler of its 14 per cent growth in a year when the industry grew 13 per cent.

The question for the medium term is whether CNG cannibalises EV adoption or coexists with it. The evidence so far suggests coexistence: CNG appeals to the Rs 7-12 lakh buyer in Tier-2 and Tier-3 cities where charging infrastructure remains thin, while EVs are gaining traction in the Rs 12-20 lakh urban buyer segment where total cost of ownership — including home charging — makes the calculus work