Hydrogen vs LNG trains in India represents two very different approaches to reducing the railway sector’s dependence on conventional diesel. While hydrogen uses fuel-cell technology to generate electricity onboard, LNG allows a modified diesel engine to operate using both LNG and diesel.
India’s first hydrogen fuel-cell train began operations on the Jind-Sonipat section in Haryana in July 2026. Two months later, Indian Railways introduced its first LNG-diesel dual-fuel train from Sabarmati in Gujarat.
Both projects are being tested as cleaner alternatives to conventional diesel. However, the technologies, infrastructure requirements and long-term applications are significantly different.
Hydrogen vs LNG Trains in India: What Is the Difference?
The key difference between hydrogen and LNG trains is their propulsion technology.
- Hydrogen train: Uses a fuel cell to generate electricity onboard.
- LNG train: Uses a modified internal-combustion engine that can operate on LNG and diesel.
- Hydrogen: Hydrogen reacts with oxygen in a fuel cell to generate electricity, with water vapour as the direct by-product.
- LNG: LNG is still burned in an engine and therefore produces carbon emissions.
- Hydrogen: Requires dedicated hydrogen production, storage and refuelling infrastructure.
- LNG: Can retain the basic diesel-engine architecture after conversion.
- Hydrogen: Represents a new propulsion system.
- LNG: Primarily reduces diesel consumption without completely replacing the existing propulsion system.
Hydrogen Train Is Not Simply a Diesel Train With New Fuel
The biggest difference in the hydrogen vs LNG trains in India comparison is the way the train generates power.
The hydrogen train stores hydrogen onboard. The hydrogen reacts with oxygen inside a fuel cell to produce electricity, which then powers the train.
India’s hydrogen train is a 10-coach rake equipped with two Hydrogen Driving Power Cars. Together, the power cars have a combined output of 2,400 kW and are supported by lithium iron phosphate batteries.
The train is being operated on the Jind-Sonipat section as an indigenous pilot project. Indian Railways has also established dedicated hydrogen storage and dispensing infrastructure at Jind.
According to the Railway Ministry, the train had travelled more than 1,200 km and saved over 3,200 litres of diesel by July.
Therefore, the hydrogen project is testing more than an alternative fuel. It is also testing an entirely different railway propulsion ecosystem.
LNG Train Retains the Diesel Engine
The LNG project follows a different approach.
Indian Railways converted two 1,400-HP Driving Power Cars at the Sabarmati Integrated Coaching Depot to operate using both LNG and diesel.
Therefore, the train is not an LNG-only train. It can continue operating on diesel when required, while LNG replaces a portion of the diesel requirement.
The system is designed to substitute around 40% of diesel consumption with LNG. More than 2,000 km of field trials were conducted before the train was introduced.
As a result, LNG represents more of a fuel-switching strategy than a complete change in propulsion technology.
LNG Train: Key Numbers
The Indian Railways LNG project includes:
- Two converted Driving Power Cars
- 1,400 HP per power car
- Around 40% diesel substitution
- More than 2,000 km of field trials
- An eight-coach rake
- Estimated annual saving of around ₹11.9 lakh per Driving Power Car
- Estimated annual saving of around ₹23.9 lakh for an eight-coach rake, based on trial data
These figures show why LNG can be considered an incremental approach to reducing diesel consumption.
Which Train Is Cleaner: Hydrogen or LNG?
The answer depends on the environmental measure being considered.
At the point of operation, a hydrogen fuel-cell train produces water vapour as its direct by-product and does not have tailpipe carbon emissions.
LNG is different because it remains a fossil fuel. However, replacing part of the diesel requirement with LNG can reduce emissions compared with conventional diesel operation. Railway project estimates indicate reductions in emissions such as carbon dioxide, nitrogen oxides and particulate matter.
Hydrogen also has an important qualification: its overall environmental benefit depends on how the hydrogen is produced.
The Jind project uses electrolysis for hydrogen production. When electrolysis is powered by renewable electricity, hydrogen can be produced through the green-hydrogen pathway.
Therefore, hydrogen offers a zero-tailpipe-emission propulsion system, while LNG primarily aims to reduce diesel consumption while retaining combustion-engine technology.
Hydrogen Requires New Infrastructure
Infrastructure is another major difference between the two technologies.
For hydrogen trains, Indian Railways needs systems for hydrogen production or procurement, high-pressure storage, dispensing and safe operation of fuel-cell equipment.
The Jind facility has hydrogen storage capacity of around 3,000 kg. Hydrogen can be stored at pressures of up to 500 bar and dispensed at 350 bar.
LNG does not require the same type of new propulsion ecosystem. Instead, the existing engine architecture is modified to accommodate LNG while retaining the ability to operate on diesel.
This creates two very different infrastructure questions for Indian Railways.
Hydrogen asks: Can India establish a reliable hydrogen production, storage and refuelling ecosystem for railways?
LNG asks: Can Indian Railways reduce diesel consumption by modifying existing train technology?
Why Does Indian Railways Need Alternative Fuels?
Indian Railways has rapidly expanded electrification across its broad-gauge network, reducing its dependence on diesel.
Therefore, hydrogen and LNG trains are not necessarily intended to replace electric locomotives across India’s main railway network.
Instead, these projects are testing alternative propulsion options for railway sections and applications where such technologies may be considered.
Hydrogen could eventually provide a completely different zero-tailpipe-emission propulsion option. However, it requires new infrastructure, fuel supply chains and specialised equipment.
LNG provides a more incremental pathway. It allows Indian Railways to retain the basic engine architecture while introducing another fuel and reducing diesel consumption.
Hydrogen vs LNG Trains: Two Different Transition Strategies
The hydrogen vs LNG trains in India comparison ultimately highlights two different stages of the transition away from conventional diesel.
LNG is an adaptation. Hydrogen is a technological shift.
The LNG train is designed to determine how much diesel consumption can be reduced without completely replacing the existing propulsion system.
The hydrogen train, meanwhile, is testing whether trains can eventually operate using a fundamentally different energy and propulsion system.
The long-term outcome will depend on several factors, including fuel availability, infrastructure investment, maintenance requirements, operating costs, emissions and the ability to scale either technology beyond pilot projects.
For now, hydrogen and LNG should be viewed as two separate experiments in India’s post-diesel railway transition rather than as direct substitutes for each other.
Conclusion
The hydrogen vs LNG trains in India debate reflects two different approaches to cleaner railway operations.
Hydrogen focuses on a new fuel-cell-based propulsion system with zero tailpipe carbon emissions, while LNG focuses on reducing diesel consumption through a dual-fuel internal-combustion system.
As Indian Railways continues to expand electrification, these pilot projects could provide useful data on where alternative propulsion technologies may have a role in the country’s future railway network.
