Why Petrol Car Sales Are Falling and Alternate Fuels Are Winning?

Panic over India’s rapid rollout of E20 fuel (20% ethanol blended with petrol) is changing the country’s car market. Recent sales data for July shows a clear trend: Indian car buyers are moving away from standard petrol cars.

Many buyers worry that high ethanol blends could damage older engines or reduce mileage. Because of this uncertainty, people are choosing alternatives like Compressed Natural Gas (CNG), Electric Vehicles (EVs), and even diesel cars. This shift has left car dealerships with a large backlog of unsold petrol vehicles.

Unsold Petrol Cars Pile Up at Dealerships

Overall showroom visits remain strong across India. People still want to buy cars, but they are changing which fuel types they prefer.

Data from the Federation of Automobile Dealers Associations (FADA) shows that over 25% of dealer stock is now older than 60 to 70 days. Normally, car stock stays at a dealership for 30 to 33 days before being sold. FADA recommends keeping inventory down to just 21 days.

This build-up happened because car makers shipped far more vehicles than dealers could sell in July:

• Factory Shipments to Dealers: 4,69,000 cars

• Actual Sales to Customers: 4,16,000 cars

• Unsold Extra Stock: 52,000 cars (mostly petrol models)

Petrol Loses Popularity to CNG, EVs, and Hybrids

For years, petrol cars were the top choice for Indian buyers. That gap is now closing fast.

In the past, petrol cars held a 13% lead over all other fuel options combined. Today, petrol’s market share has dropped to 41.68%, while alternative fuels (CNG, EVs, and Hybrids) have risen to 40.59%.

“At this rate, alternate fuels will likely overtake petrol within the next month or two.”

— Sai Giridhar, Vice President, FADA

Diesel Makes an Unexpected Comeback

Surprisingly, diesel cars are seeing a jump in demand. In July, diesel car market share climbed to 17.73%, which is a 1.4% increase over the previous period.

Car buyers view diesel as a safe choice because standard diesel does not contain ethanol. However, the government is separately considering blending Isobutanol into diesel in the future.

What Automakers Are Seeing

Car companies confirm this shift. Tata Motors reports stronger interest in its diesel models, especially mid-size SUVs around the ₹15 lakh price range. Buyers like these models for their strong pulling power and better fuel efficiency on long drives.

Heavy Discounts on Unsold Petrol Models

To clear out aging stock and free up locked money, car companies and dealers are offering big discounts on petrol models.

Discounts on current models include:

• Hyundai Grand i10 & i20: Up to ₹95,000 off

• Tata Nexon & Kia Sonet: Up to ₹95,000 off

• Kia Carens Clavis: Up to ₹95,000 off

Older unsold cars from the 2025 model year carry even larger price cuts. Reductions often pass ₹1.5 lakh, with models like the 2025 Tata Curvv seeing discounts as high as ₹3.5 lakh. These offers aim to clear out older stock while car makers adjust their factories to produce more CNG and electric vehicles.