Maruti Brezza Mileage Comparison: Petrol vs CNG

The Maruti Suzuki Brezza is among India’s most sought-after compact SUVs, providing an ideal blend of style, utility, and fuel efficiency. A 1.5-litre petrol engine offers smooth performance for urban drives and highway usage. 

There is also a factory-fitted CNG variant available from Maruti, making the Brezza a good choice for customers who aim to reduce fuel costs without sacrificing the comfort and reliability of a compact SUV.

Regarding features, the Brezza is equipped with modern technology, including a 9-inch infotainment system with wireless Android Auto and Apple CarPlay, connected car technology, a sunroof, and as many as six airbags. 

Although the petrol model is best suited for those who crave power and long-distance comfort, the CNG model excels with its affordability and green running, providing families with the flexibility they need according to their driving requirements.

When comparing its petrol and CNG variants, let’s look at how the Maruti Brezza performs in terms of mileage.

Maruti Brezza ARAI Mileage Figures

Maruti Brezza offers the following ARAI-certified mileage figure: 

Engine & Transmission	ARAI Mileage (kmpl)
Petrol – Manual	19.89 kmpl
Petrol – Automatic	19.8 kmpl
CNG – Manual	25.51 km/kg

Clearly, the CNG variant delivers the highest mileage on paper, while the petrol versions strike a balance between performance and efficiency.

Maruti Brezza Real-World Mileage vs ARAI Mileage

The Automotive Research Association of India (ARAI) certifies and tests the mileage claims made by car manufacturers. Instead of putting the cars through real road testing, ARAI simulates road conditions using a dynamometer. However, it has been found that the real mileage is much lower than the ARAI-approved mileage numbers.

Roads, weather, driving conditions, driving style, and many other factors affect these real-time figures. A person who travels mostly on highways will get more mileage than someone who drives in the city.

In real-world tests, the Brezza petrol MT returned 10.47 kmpl and 15.89 kmpl in the city and on the highway, respectively. Here are the factors that affect the difference between ARAI and real mileage:

• Driving Style: Aggressive acceleration, hard braking, and frequent clutch use consume more fuel than smooth driving.
• Aerodynamics: Open windows, roof carriers, and exterior accessories increase drag, reducing fuel efficiency compared to test conditions.
• Tyre Pressure & Type: Under-inflated tyres and high rolling resistance increase drag on the road, making the engine work harder.
• Extra Load: Carrying an unnecessary load reduces real-world mileage.
• Air Filter Condition: A clogged air filter reduces airflow, making the engine burn more fuel to maintain performance.
• Spark Plugs: Worn-out spark plugs affect combustion quality, and incomplete fuel burning reduces mileage.
• Fuel Injectors: Dirty injectors disrupt proper fuel-air mixing, resulting in reduced efficiency compared to controlled test environments.
• Wheel Alignment & Balancing: Poor alignment increases rolling resistance, causing the engine to consume more fuel during everyday driving.

Real-world mileage provides a more realistic view of what owners can expect from the Maruti Brezza daily, even though ARAI data serve as a valuable baseline for most buyers.

Maruti Brezza Fuel Efficiency Comparison: Petrol vs CNG

The Maruti Brezza petrol version is ideal for city driving and occasional highway travel, as it offers smooth performance and ease. The CNG variant, on the other hand, excels due to its increased efficiency and reduced running costs, particularly for everyday commuters. 

Both options strike a balance between practicality, but buyer preference ultimately depends on usage patterns.

Maruti Brezza City Fuel Efficiency Comparison

When comparing petrol vs CNG variants of cars in city driving, several factors come into play that directly affect fuel efficiency and overall driving experience. City traffic with frequent stops, idling at signals, and heavy A/C use puts unique stress on both engines, but how petrol and CNG handle these conditions is quite different.

The main factors for the disparity are

• Stop-and-Go Traffic: In city traffic, vehicles frequently accelerate and decelerate. CNG engines are efficient at steady speeds but lose efficiency in sudden acceleration as they produce less power than petrol engines. Petrol engines respond more quickly to sudden throttle inputs, making them slightly smoother in traffic.
• Idling at Traffic Signals: Idling consumes fuel while the car remains stationary. Petrol cars consume more fuel when idling than CNG cars, but CNG engines may take longer to restart or feel less responsive after long idle periods. This affects convenience and fuel wastage differently in both fuels.
• Air Conditioning Load: A/C usage is high in city conditions. Petrol engines manage the A/C load better, while CNG vehicles experience a marked reduction in power and mileage when the A/C is active, resulting in decreased efficiency.
• Engine Power & Pickup: Petrol engines generate more power per litre, which aids in rapid overtakes or acceleration from red lights. Due to lower combustion energy, CNG vehicles require additional throttle input in city conditions, resulting in a marginal reduction in mileage.
• Fuel Characteristics: CNG has a higher octane rating, resulting in cleaner and more efficient combustion; however, it possesses a lower energy density than petrol. Under stop-start urban driving conditions, lower calorific value translates to greater consumption of CNG to achieve the same power output as petrol.
• Maintenance & Engine Wear: City driving strains spark plugs, injectors, and valves. Petrol engines can withstand this stress better than CNG engines, which can experience more wear and tear if not properly maintained, resulting in decreased efficiency over time.
• Vehicle Load & Passenger Weight: Carrying extra passengers or goods in the city affects CNG cars more due to their lower torque delivery compared to petrol engines. Petrol cars can sustain better mileage under heavier loads in urban driving.

While CNG remains the cheaper and cleaner option, petrol engines deliver smoother performance, quicker responsiveness, and better handling of city stressors, making them more reliable for everyday urban driving.

Maruti Brezza Highway Fuel Efficiency Comparison

Driving on highways differs greatly from driving in cities when comparing petrol with CNG. Long distances, constant speeds, and few stops are preferred on highways. Nevertheless, the performance of each fuel type under these circumstances varies depending on power delivery, fuel characteristics, and convenience.

Factors that cause this variance are listed below:

• Constant Speed & Cruise Control: Highways enable cars to maintain a constant speed. This is CNG’s strength, as engines consume less fuel when running at a steady pace. Petrol cars are efficient too, but CNG gives better mileage in such conditions.
• Engine Power at Higher Speeds: Petrol engines have more power above 90–100 km/h, making them better for overtakes and uphill stretches. Due to their lower energy density, CNG engines often feel underpowered at high speeds, especially in larger cars.
• Fuel Characteristics (Energy Density): CNG burns cleaner but has a lower calorific value than petrol. Petrol provides more power per litre at highway cruising speeds, while CNG focuses on cost savings rather than performance.
• Air Conditioning and Comfort Features: A/C is used continuously on long highway drives. Petrol engines handle this load smoothly with minimal impact on mileage, while CNG vehicles show a bigger drop in efficiency when the A/C is on for extended periods.
• Vehicle Load & Cargo Weight: Highways involve longer trips with passengers and luggage. Petrol engines give better torque and stability at higher loads. CNG cars are economical but lose efficiency and struggle to overtake when heavily loaded.
• Availability Issues: Despite CNG’s low cost, customers find it challenging to obtain it due to insufficient infrastructure and inactive fuel pumps, especially when travelling long distances on highways. 

Ultimately, CNG is suitable for cost savings and cleaner highway emissions. Still, petrol is better for performance, reliability under load and wider fuel availability, so it’s the practical choice for long-distance travel.

Maruti Brezza Fuel Cost Comparison: Petrol vs CNG

When deciding between the Maruti Brezza’s petrol and CNG versions, it’s essential to understand the fuel costs. Based on a 1,500 km running distance, the monthly fuel costs for the two versions are contrasted in the table below.

Aspects	Petrol	CNG
Monthly Running Distance	1500 km	1500 km
Monthly Fuel Use	Approx. 75 liters	Approx. 60 kg
Average Monthly Fuel Cost	₹7,894.74*	₹4200*
Average Yearly Fuel Cost	₹94,736*	₹50,400*
5-Year Fuel Cost	₹4,73,684*	₹2,52,000*

Note: For calculations, petrol is assumed to be ₹100 per litre and CNG to be ₹70 per kg. While fuel prices may vary across regions, the Brezza CNG consistently proves more economical. Its lower running costs make it a smart choice for frequent travellers, offering substantial savings over extended usage.

Maruti Brezza Mileage vs Competitors

Comparing the Maruti Brezza’s mileage with that of its closest rivals provides a clear picture of where it stands in terms of fuel efficiency. 

The table below showcases the official petrol and CNG mileage figures (where available) across leading compact SUVs in the segment.

Model	Petrol Mileage (kmpl)	CNG Mileage (km/kg)
Maruti Brezza	19.89 kmpl	25.51 km/kg
Hyundai Venue	18.31 – 24.2kmpl	N/A
Maruti Grand Vitara	21.11 – 27.97 kmpl	26.6 km/kg
Toyota Urban Cruiser Hyryder	21.12 – 27.97 kmpl	26.6 km/kg

Overall, the Maruti Brezza holds its ground well, with the CNG variant emerging as the more economical choice for daily commuters than its petrol counterpart and close rivals.

Summary

The Maruti Suzuki Brezza has petrol and CNG options to cater to different needs. The petrol one is smooth, convenient, and has more power, making it suitable for both city and highway use. The CNG option is cost-effective and eco-friendly, making it ideal for users who run their vehicles daily. 

In the real world, both will vary in efficiency depending on traffic, driving style and load. Petrol will be more responsive and reliable for long-distance transport, while CNG will save you more on running costs, making it a convenient option.

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