Rising fuel prices are driving a strategic shift towards Compressed Natural Gas (CNG) in India. For vehicle owners, converting to CNG offers significant long-term savings and a reduced environmental footprint. This guide provides a clear breakdown of the CNG fitting cost in India, analyzes kit options, and outlines the conversion process to help you make a smart, informed investment.

Understanding the CNG Kit Components 

A CNG kit converts a petrol or diesel engine into a dual-fuel system. It is designed to store, regulate, and deliver CNG to the engine efficiently and safely.

Key components include:

• CNG Cylinder: Stores gas at 200, 250 bar, with size depending on range needs.
• Electronic Control Unit (ECU): Controls fuel mixture and ignition timing.
• Pressure Regulator: Reduces pressure from the cylinder to usable levels.
• High-Pressure Tubes & Clamps: Carry gas from the cylinder to the engine.
• Refilling Valve: Connects to the CNG dispenser.
• Switching Module: Lets drivers shift between petrol and CNG modes.

Different Types of CNG Kits in India

1. Venturi CNG Kits

Among the oldest kits, designed mainly for carburetor vehicles. Gas is injected in a fixed quantity based on throttle input.

Key Features:

• Simple design, minimal components.
• No ECU required.
• Works with older cars.

Advantages:

• Low cost, easy to maintain.
• Straightforward installation.

Disadvantages:

• Poor efficiency and power.
• Not suitable for modern vehicles.

Why Choose It: Best for older models where affordability matters more than performance.

2. Sequential CNG Kits

 Advanced kits for fuel-injected cars. Gas is supplied via injectors and controlled by ECU.

Key Features:

• Works only with EFI systems.
• Available in closed-loop (eco-friendly) and open-loop (performance-focused).

There are two types of sequential CNG Kit:

Advantages:

• Better efficiency and smooth drive.
• Reduced knocking and cleaner emissions.

Disadvantages:

• Costlier than Venturi.
• Needs expert fitting and tuning.

Why Choose It: Ideal for modern cars, balancing mileage and performance.

3. Liquid Phase CNG Kits

 Next-generation kits that inject CNG in liquid form for efficient combustion.

Key Features:

• Keep gas liquid until injection.
• Consistent pressure delivery.

Advantages:

• High power and mileage.
• Very low emissions.

Disadvantages:

• Very expensive.
• Limited availability in India.
  

Why Choose It: Suitable for premium or performance cars where efficiency and power matter equally.

4. Bi-Fuel CNG Kits

Allows vehicles to run on both petrol, diesel and CNG, switching automatically.

Key Features:

• Two fuel tanks.
• Automatic switching for convenience.

Advantages:

• Reliable for long trips.
• Backup fuel option.

Disadvantages:

• Higher cost.
• Slightly lower efficiency.

Why Choose It: Best for highway users who need flexibility.

5. Monofuel CNG Kits

Vehicles run only on CNG without petrol backup.

Key Features:

• Dedicated ECU and cylinder.
• Engine optimized for CNG use.

Advantages:

• High efficiency and lower maintenance.
• Simple design.

Disadvantages:

• No backup fuel.
• Range depends on cylinder size.

Why Choose It: Best for city users with reliable CNG station access.

Best CNG Kit Brands in India

Breaking Down the CNG Fitting Cost in India

A proper CNG fitting involves more than just the kit:

• CNG Kit Price: ₹40,000–55,000 for sequential kits.
• Installation: ₹3,000–7,000 depending on workshop.
• RTO Registration & RC Update: ₹2,000–3,000.
• Insurance Endorsement: ₹1,200–1,500.
• Licence Fee: Varies by state.

Total: ₹50,000–65,000 for aftermarket kits. Factory-fitted cars cost ₹90,000–1,20,000 more than petrol models.

Price, Performance, and Reliability

• Price: Factory kits are expensive but dependable, aftermarket kits are cheaper with variable quality.
• Performance: Sequential kits from Lovato, Zavoli, and Tomasetto deliver good mileage and smoother drives.
• Reliability: Choose RTO-approved kits with warranty for long-term safety.

CNG Fitting for Your Car

1. Select a Workshop: Choose an RTO-approved CNG fitting center.
2. RTO Permission: Apply before installation.
3. Installation: Cylinder mounted, pipes fitted, refilling valve, ECU, and switch installed.
4. Calibration: ECU tuned for mileage and performance.
5. Approval: RTO inspects, updates RC, and insurance endorsement is done.

Maintenance and Tips for Longevity

• Air Filter: Clean at 5,000 km, replace at 10,000 km.
• Spark Plugs: Replace at 40,000 km.
• CNG Filter: Replace every 20,000 km.
• Cylinder Test: Every 3–5 years.

Tips:

• Start on petrol, switch after warm-up.
• Avoid running on an empty tank.
• Park in shade to reduce evaporation.

Things to Remember Before Switching to CNG

• Use only RTO-approved kits.
• Inform insurance provider post-installation.
• Factory-fitted cars enjoy better resale.
• Ensure nearby CNG stations for convenience.

Conclusion

CNG conversion is more than just saving money, it’s about choosing a cleaner, future ready fuel. The CNG fitting cost in India ranges from ₹40,000 to ₹1.2 lakh depending on kit type and installation. While factory fitted kits are the most reliable, aftermarket options from Lovato, Zavoli, and Tomasetto are also excellent when installed correctly.

By selecting the right kit, ensuring proper fitting, and maintaining it regularly, you can enjoy savings, efficiency, and safety. With expanding infrastructure and supportive policies, CNG is fast becoming the future of urban mobility in India.