Daily commuting is a big expense for office goers across the country including Delhi-NCR. If you drive a car 50 kilometers or more every day, then the cost of petrol will be heavy on your pocket. In March 2026, the price of petrol in Delhi is Rs 94.77 per liter, while CNG is available at only Rs 77.09 per kg.
In such a situation, a car with factory fitted CNG kit not only provides huge savings in fuel cost, but also gives you an opportunity to save thousands of rupees every month by spending almost half of the petrol. This is not a marketing claim, but complete mathematics, which we will understand step by step today. Let us know in detail why this is the best option for daily office commuters.
how much difference in price
First of all let us understand the reality of the current fuel price. In big cities like Delhi where CNG stations are available at every corner, there is a big difference in the prices of petrol and CNG. Petrol is Rs 94.77/litre, while CNG is only Rs 77.09/kg. But savings come not just from price but also from mileage.
How much will be the savings?
Now comes the real math – running cost of petrol vs factory fitted CNG. Let's take a real-world example that is perfect for office commuters. Suppose your car is a popular factory CNG model, like Maruti Suzuki Swift or WagonR CNG.
The real world mileage of a petrol car in city traffic is usually 15-18 km/litre. Whereas the real world mileage of factory fitted CNG is easily available in the city up to 24-28 km/kg. In such a situation the calculation will be like this-
Petrol Car Expenses (Real City Driving)
- Mileage- 16 km/l (average traffic)
- Cost per kilometer – 94.77 ÷ 16 = ₹5.92 per km
Factory Fitted CNG Car Cost (Real City Driving)
- Mileage- 25 km/kg (average traffic)
- Cost per kilometer – 77.09 ÷ 25 = ₹3.08 per km
The cost of CNG is almost half that of petrol! See how much will be saved by driving 50 kilometers daily.
- Petrol Daily Expenses = 50 × 5.92 = ₹296
- CNG Daily Expenses = 50 × 3.08 = ₹154
- Daily Savings = ₹142
Best for office goers!
If you go to office 25 days, the monthly savings will be around ₹ 3,550 and the annual savings will be around ₹ 42,600. If you drive 60-70 km daily then this figure can reach ₹ 50,000-60,000 annually. In 3-4 years, the extra upfront cost of the factory CNG variant (Rs 50,000 to 1 lakh) will be completely recovered.
This mathematics applies to every car. Be it Swift, Brezza CNG or Tata Punch iCNG. Boot space is also not reduced in Tata's models with dual cylinder technology, which is a big plus of factory fitted. Along with this, car companies like Maruti and Hyundai have also started introducing CNG cars with twin cylinder technology.
Why only factory fitted CNG?
The benefits of a factory fitted CNG car are not limited to money only. Installing aftermarket kit voids the manufacturer's warranty and the service center refuses to do so in case of engine problems. In factory fitted, the engine is specially tuned for CNG, power loss is very low (only 10-15%) and engine life is long. Let us have a look at some factory fitted CNG models-
- Maruti WagonR CNG: Its price starts from Rs 6.5 lakh. ARAI mileage is 34 km/kg.
- Maruti Celerio CNG: Highest mileage (35.44 km/kg ARAI) and best option in budget.
- Maruti Swift CNG: Sporty looks, real mileage 27+ km/kg, perfect for youth.
- Tata Punch iCNG: SUV style, good boot space due to dual cylinder, price starts at only ₹ 7.5 lakh.
what understand: Factory fitted CNG car is a game changer for daily office goers. The whole mathematics is clear. Compared to petrol cars, they cost around ₹ 3 less per km. Annual savings of 40-50 thousand and less pollution also make it special. If you plan to buy, then take a test drive and understand the math yourself. Once you switch to CNG, you will never go back to petrol!