Is CNG the new diesel for mass market cars?

There was a time when diesel engines were the backbone of the Indian passenger vehicle market. Initially popular in commercial vehicles, diesel gradually made its way into SUVs and private cars, thanks to its torquey nature, strong low-end performance, and excellent fuel efficiency. Over time, diesel powertrains became a preferred choice for long-distance driving and heavy-duty usage.

Soon, even smaller vehicles began adopting diesel engines. Models like the Tata Indica brought diesel power to the masses, and it wasn’t long before several hatchbacks followed suit. Back then, having a diesel option was almost standard across segments. Take, for example, the Maruti Suzuki Celerio, which even came with a tiny diesel engine, highlighting how widespread diesel technology had become.

However, the landscape began to shift

With the government gradually discouraging diesel usage and implementing stricter regulations, the segment started to lose ground. A major factor has been the 10-year registration limit on diesel vehicles in Delhi-NCR, regardless of whether they comply with the latest emission norms. This regulatory uncertainty has made buyers increasingly cautious, especially in urban markets, leading to a steady decline in diesel’s popularity in smaller segments.

The rise of CNG

CNG, on the other hand, has followed a somewhat similar trajectory. Earlier, it was largely limited to commercial vehicles or available as an aftermarket installation. Factory-fitted CNG options were rare, and buyers often had to compromise on convenience and reliability.

This began to change when Maruti Suzuki introduced factory-fitted CNG kits across its lineup, making the technology more accessible and trustworthy. Soon, other manufacturers followed suit, expanding the availability of CNG options across multiple segments.

CNG technology itself has also evolved significantly. Earlier concerns such as compromised boot space have been addressed with innovations like dual-cylinder setups and underbody tank placement, allowing for better practicality. Additionally, while CNG was once restricted to lower variants, manufacturers like Tata Motors now offer CNG options even in higher trims, making it a more attractive and versatile choice for buyers.

Performance, which was once a major drawback of CNG vehicles, has also improved. While CNG variants still produce less power compared to their petrol counterparts, the gap has narrowed considerably, making them more usable for everyday driving.

So, is CNG the new diesel?

CNG emerged as the second most widely used fuel in India’s passenger vehicle market in FY2026, with its share increasing to 21.98 per cent from 19.60 per cent in the previous financial year. In contrast, diesel’s share stood at 18.08 per cent, while electric vehicles accounted for 4.25 per cent. Petrol remained the dominant fuel with 47.48 per cent.

CNG does mirror diesel in one key aspect: cost efficiency. It offers significantly lower running costs, which has always been the biggest draw for budget-conscious buyers. However, the comparison isn’t entirely straightforward.

CNG prices have risen sharply over the years. There was a time when CNG cost as little as Rs 34 per kg, but today, prices hover around Rs 77 per kg in many cities. While it still remains economical to run, the gap has narrowed compared to the past.

In that sense, cost efficiency is the primary similarity between CNG and diesel. Beyond that, they serve different purposes and cater to different needs. Whether CNG continues to grow and truly take over diesel’s former role in the mass market remains to be seen.

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