Make the eco-friendly switch to natural gas vehicles. Understand the cost comparison, environmental benefits, and safety features of NGVS to see if they are right for you.
What are natural gas vehicles?
A natural gas vehicle (NGV) runs on natural gas, stored as compressed natural gas (CNG) or liquefied natural gas (LNG) in high-pressure tanks, instead of petrol or diesel. NGVs use specially designed engines and fuel systems that handle gaseous fuel, so combustion is cleaner and emissions are lower than in equivalent petrol or diesel vehicles.
What are the key features of NGVs?
- Lower emissions: NGVs emit fewer pollutants compared to petrol or diesel vehicles.
- Cost-effective: natural gas is often cheaper than traditional fuels.
- Widely available: many countries, including india, have a growing infrastructure for natural gas refuelling.
- Environmental benefits: NGVs produce fewer greenhouse gases and pollutants than conventional vehicles, roughly 22% less than diesel and 29% less than petrol, with almost no particulate matter.
- Fuel types: NGVs are dedicated (run only on natural gas), bi-fuel (two separate fuel systems) or dual-fuel (diesel and natural gas, usually for heavy-duty engines).
- Performance: NGVs offer power, acceleration and cruise speed comparable to conventional vehicles, and their spark-ignition engines can run higher compression ratios for better efficiency.
- Storage and infrastructure: Natural gas is stored on board in high-pressure cylinders for CNG, or cryogenic tanks for LNG. Refuelling infrastructure is growing but is still less common than petrol stations, so NGVs suit fleets with on-site fuelling.
NGVs are suitable for various applications, from passenger cars to buses and heavy-duty trucks. Their use contributes to reducing greenhouse gases, promoting sustainable mobility.
Key types of natural gas vehicles
- Dedicated NGVs: these are designed to run solely on natural gas.
- Bi-fuel vehicles: these can operate on both natural gas and petrol/diesel.
- Dual-fuel vehicles: typically used in heavy-duty applications, they run on a combination of natural gas and diesel.
How natural gas vehicles work
Natural gas vehicles work by storing compressed or liquefied gas in tanks. The gas is delivered to the engine via fuel injectors, where it mixes with air and is ignited to produce energy. This process is similar to petrol engines but produces fewer harmful emissions.
Natural gas engines are equipped with specialised components like high-pressure tanks, regulators, and fuel injection systems. These ensure efficient operation while maintaining safety standards.
Advantages of natural gas vehicles
Natural gas vehicles offer clear gains in running cost, safety and everyday convenience. The main advantages of NGVs are:
- High efficiency: NGVs deliver good fuel economy, roughly 20 to 25 km per kg of CNG, which lowers running costs.
- Refined performance: They run quietly with strong torque, giving steady and responsive engine performance.
- Higher ignition temperature: CNG has a high auto-ignition temperature of about 540°C, which lowers the risk of accidental combustion compared with petrol.
- Safer in a leak: CNG is lighter than air, so any leak disperses quickly, unlike petrol or diesel, which can pool on the ground.
- Strong fuel system: CNG storage cylinders are built to high safety standards for on-board use.
- Dual-fuel flexibility: Many CNG vehicles let you switch between CNG and petrol, which helps on long trips where CNG stations may be scarce.
Together, these benefits make NGVs a cost-effective and safe choice for daily driving and long-distance travel.
Environmental impact of natural gas vehicles
NGVs produce significantly fewer greenhouse gases than petrol or diesel vehicles. They also reduce smog-causing pollutants like nitrogen oxides. Using NGVs can help cities combat air pollution and promote healthier living conditions.
Cost comparison: natural gas vehicles vs. Conventional vehicles
| Feature | Natural gas vehicles | Petrol/diesel vehicles |
| Fuel costs | Lower | Higher |
| Emissions | Minimal | Significant |
| Maintenance costs | Lower | Moderate to high |
| Initial investment | Slightly higher | Moderate |
Availability of natural gas infrastructure
India has rapidly expanded its natural gas network, with over 7,000 CNG stations now operating nationwide. Major cities already have a well-developed refuelling network, making it easier for NGV owners to fill up close to home. Rural areas are catching up as new stations and pipelines reach more districts each year.
- Pipeline network: India's operational gas pipeline grid now exceeds 25,000 km, and approved projects aim to extend it well beyond that by 2030, reaching 20 states and 3 union territories.
- City gas distribution (CGD): More than 307 geographical areas are authorised to supply piped natural gas (PNG) and compressed natural gas (CNG) to homes, businesses and vehicles across India.
- Regulatory support: Time-bound approvals help speed up pipeline laying and infrastructure development.
- LNG terminals: There is a growing push to strengthen LNG terminals and connect them to the national grid to improve supply.
- Major projects: Large expansions such as the Jagdishpur-Haldia-Bokaro-Dhamra pipeline and the Kochi-Mangalore-Bengaluru network are widening coverage, especially in eastern and southern India.
Key considerations in using natural gas vehicles
- Fuel availability: check local refuelling station access.
- Vehicle compatibility: ensure your vehicle can be converted to run on natural gas.
- Maintenance needs: regular servicing ensures safety and efficiency.
Natural gas vehicle maintenance and safety
Maintaining an ngv involves regular checks on fuel tanks, pressure valves, and engine components. Safety is paramount, and NGVs come equipped with features to prevent leaks or overpressure. Proper installation and servicing are critical for optimal performance.
Conversion of conventional vehicles to natural gas
Converting a petrol or diesel vehicle to natural gas requires installing specialised equipment. Conversion kits include high-pressure tanks, regulators, and injectors. Ensure the process is handled by certified technicians for safety and compliance.
Future of natural gas vehicles
The future of NGVs looks promising, with advancements in technology improving efficiency and safety. Governments worldwide are encouraging their adoption through subsidies and incentives. As infrastructure grows, NGVs are likely to become a common sight.
Case studies: success stories of natural gas vehicles
- Public transport: Many Indian cities have adopted CNG buses, reducing urban pollution significantly.
- Corporate fleets: Companies are switching to NGVs for cost savings and sustainability goals.
Government Incentives for NGV Adoption in India
- Subsidies on NGV conversions: Financial support for converting conventional vehicles
- Tax benefits: Lower taxes on NGVs in many states
- Infrastructure development: investments in refuelling stations to promote NGV use
Conclusion
Natural gas vehicles offer an eco-friendly, cost-effective alternative to traditional vehicles. With their growing popularity, adopting this cleaner technology can benefit individuals and the planet. With the recent growth of electric vehicles production and infrastructure improvement, you can also consider buying them. You can charge them at your home and pay your electricity bill easily using Bajaj Finance’s electricity bill payment platform that uses Bajaj pay (powered by Bharat Connect).
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Frequently asked questions
A government-approved CNG kit usually costs around Rs. 30,000 to Rs. 60,000, depending on the kit type (sequential or venturi) and your car. Fitment must be done by an authorised installer, and the change has to be endorsed on your RC.
India has over 7,000 CNG stations, and the network keeps growing as new city gas distribution areas come online. Coverage is strongest in major cities and along key highways, with smaller towns being added steadily. Check PNGRB or your city gas distributor for the current count.
Yes. CNG cylinders must undergo a periodic hydrostatic (hydro) test to confirm they can safely hold pressure, typically once every few years as specified by the regulations. A valid test certificate is required to keep using and refuelling the cylinder.
A CNG vehicle costs less upfront, refuels in minutes and uses an existing station network, but still burns fuel. An EV has zero tailpipe emissions and lower running cost per km, but a higher purchase price and dependence on charging. Your choice depends on budget, running and charging access.
CNG cars attract a lower GST rate than many larger petrol or diesel vehicles, and some states offer reduced road tax or registration charges to encourage cleaner fuels. Benefits vary by state, so check your state transport department for the current concessions.
