Running on ethanol and electricity: Why flex-fuel hybrids matter

As India accelerates ethanol adoption and cleaner mobility solutions, flex-fuel hybrid vehicles are emerging as a promising alternative, combining ethanol-powered engines with hybrid technology to reduce emissions and fuel imports.

As India pushes towards cleaner mobility solutions while reducing its dependence on imported crude oil, flex-fuel is emerging as a key part of the country's alternative fuel strategy.

What exactly is a flex-fuel hybrid?

A flex-fuel vehicle is designed to run on petrol as well as higher blends of ethanol. Unlike conventional petrol cars that are typically compatible with fuel containing up to 20 percent ethanol, flex-fuel vehicles can operate on ethanol-rich blends such as E85 (85 percent ethanol and 15 percent petrol) or even E100 in certain applications.

A flex-fuel hybrid combines this capability with a hybrid powertrain. In simple terms, the vehicle uses an internal combustion engine that can run on varying ethanol-petrol blends while also benefiting from an electric motor and battery pack. This allows the vehicle to deliver improved fuel efficiency and lower emissions compared to a traditional petrol-powered car.

Why is ethanol important?

Ethanol is primarily produced from agricultural feedstocks such as sugarcane, maize and other biomass sources. Since it is domestically produced, greater adoption of ethanol-blended fuels can help reduce India's reliance on imported oil. Higher ethanol usage can also support farmers by creating additional demand for agricultural produce while potentially lowering tailpipe emissions.

The Indian government has already accelerated ethanol blending programmes, achieving significant progress toward its ethanol adoption targets. The next phase involves enabling vehicles capable of running on much higher ethanol concentrations.

The Toyota Innova HyCross connection

Toyota has been one of the strongest advocates of multiple pathways towards decarbonisation, including hybrids, flex-fuel vehicles and hydrogen-powered technologies. A flex-fuel strong-hybrid prototype of the Innova HyCross was seen recently in Delhi.

What are the advantages?

A flex-fuel hybrid vehicle offers several potential benefits:

• Reduced dependence on fossil fuels and imported crude oil
• Lower greenhouse gas emissions compared to conventional petrol vehicles
• Improved fuel efficiency through hybrid technology
• Support for India's ethanol ecosystem and agricultural sector
• Greater flexibility for consumers as ethanol infrastructure expands

Challenges remain

Despite the promise, widespread adoption will depend on the availability of higher ethanol blends across the country. Automakers also need to ensure durability and performance when operating on ethanol-rich fuels, which have different chemical properties compared to petrol.

However, with manufacturers such as Toyota actively testing the technology and India expanding its ethanol infrastructure, flex-fuel hybrids could become an important bridge between conventional internal combustion vehicles and fully electric mobility.

At present, E85 fuel availability remains limited. In Delhi, E85 is priced at Rs 82.12 per litre, which is Rs 20 less than the current price of E20 petrol. To ensure motorists can easily identify the fuel, E85 pumps will carry dedicated branding and clear signage.

The newly inaugurated outlet on Pusa Road is Delhi's first station dispensing E85 fuel, marking the start of a wider rollout. In the initial phase, authorities plan to set up between 50 and 100 E85 stations across the Delhi-NCR and Mumbai-Pune-Nagpur corridors.

The expansion is expected to gather pace, with nearly 500 E85 dispensing stations targeted by the end of this year. By the close of 2027, the government aims to increase the network to around 5,000 outlets across major cities nationwide.

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