TATA Diesel vs TATA CNG Cars Comparison: Which is Better in 2025?
June 25th, 2025
As fuel prices and eco-consciousness are major burning issues these days, car owners often get confused about what they should prefer. In today’s world, where electric vehicles are booming in the market, diesel and CNG cars may seem outdated. However, their features, hype, demand, and offerings remain unmatched and unbeatable.
Having said that, Indian car buyers are increasingly weighing their options between CNG and diesel vehicles. TATA Motors, a well-recognized name in the market, is known for its reliable and value-driven car lineup. It also provides both fuel types across popular models like Tigor, Tiago, and Altroz.
Well, both diesel and CNG options are highly in demand, but choosing the right one depends on your driving habits, long-term goals, and overall budget. In the following sections, we break down the key differences to help you make an informed decision.
TATA’s Diesel and CNG Cars Line-up: Overview
TATA Motors is committed to offering a diverse range of vehicles that suit different fuel preferences. Whether you seek a torque-rich diesel variant or the fuel-efficient CNG models, TATA has something for every driver. Let’s explore the available diesel and CNG variants offered by the renowned brand, TATA.
TATA Diesel Car Lineup
TATA diesel lineup is designed especially for performance-oriented users who often travel long distances. These cars deliver superior performance, strong torque, and better load-handling capabilities. Let’s have a look at some of the best-selling TATA diesel cars:
TATA Altroz Diesel
The Altroz diesel is a premium hatchback that offers strong mid-range torque and excellent fuel economy. It is refined, spacious, and well-suited for users seeking a performance-efficient diesel hatchback.
TATA Nexon Diesel
The Nexon diesel model is a powerful sub-compact SUV with robust performance and even more efficient torque. It’s counted among the best SUVs suitable for long-distance travelling. If you’re someone seeking a combination of style, fuel efficiency, and safety, the Nexon should be your go-to choice.
TATA Harrier
The Harrier model is a beast in the form of a mid-size SUV with a powerful 2.0L diesel engine. It’s known for its prominent features like spacious cabin, premium feel, and rugged build. The TATA Harrier remains a perfect choice for SUV lovers and highway cruisers.
TATA Safari
The Safari model comes as a flagship 7-seater SUV with the same diesel heart as the Harrier. It offers commanding road presence and spacious interiors. These features make it an ideal option for families or those needing extra seating without compromising performance.
TATA CNG Car Lineup
TATA’s CNG lineup offers an eco-friendly and cost-effective alternative to car enthusiasts. This lineup is suitable for those seeking smooth performance and dual-fuel convenience. Let’s uncover what TATA’s CNG Car lineup has in store for budget-focused buyers and city commuters:
TATA Tiago iCNG
The Tiago iCNG is a compact hatchback, especially built for city drives. It delivers high mileage with low emissions. It’s also equipped with the style and practicality of the petrol Tiago, while offering decent fuel cost savings.
TATA Tigor iCNG
Coming to the Tigor iCNG, it’s a stylish sub-compact sedan. It offers excellent mileage, dual-fuel convenience, and spacious interiors. This one is definitely worth the investment for those seeking a budget-conscious option or an economical daily commuter.
TATA Punch iCNG
The TATA Punch is a perfect combination of SUV-like styling and CNG efficiency. It’s known for offering high ground clearance and compact city-friendly dimensions. For someone looking for a stylish, affordable, and eco-friendly vehicle, the Punch iCNG could just be the destination.
TATA Altroz iCNG
This one is given the tag of India’s first twin-cylinder CNG hatchback. It brings practicality and premium design together. Also, it has a bigger boot space in comparison to that of traditional CNG vehicles.
Performance Comparison: CNG and Diesel Variants
When you talk about performance, the TATA CNG and diesel cars allow customers to have different experiences. Taking the diesel engines into consideration, they are known for their excellent highway performance and strong torque. In contrast, the CNG variants are preferred when it comes to smoother city rides and fuel efficiency. Let’s break down how both are applicable in real-world driving conditions.
Feature | TATA CNG Cars (Tiago iCNG, Tigor iCNG, etc.) | TATA Diesel Cars (Older Tiago, Altroz Diesel, etc.) |
Engine Displacement | 1.2L Revotron (CNG-compatible) | 1.5L Revotorq Diesel |
Max Power Output | ~73 PS (CNG mode) | ~90 PS |
Max Torque | ~95 Nm | ~200 Nm |
Acceleration (0-100) | Slower due to CNG limitations | Quicker and more responsive |
Driving Dynamics | More suited for city driving | Better for highways and long trips |
Load Handling | Slight drop in power with AC on in CNG mode | Strong torque delivery even with full load |
Gear Shifts | Smooth, but may require more frequent shifts | Fewer gear changes due to better torque |
Ride Comfort | Decent, with a focus on the economy | More balanced with punchy mid-range |
Refinement Level | Quieter and smoother operation | Mild engine noise is typical of a diesel vehicle |
Fuel Efficiency and Range
As a car owner, you must be aware of the fact that fuel economy has a crucial role to play in daily driving costs. TATA CNG cars offer excellent mileage at a lower cost, whereas diesel cars can provide you with a better range per tank. Here’s a comparison of how far each car type can take you and what the estimated cost per kilometer is.
Feature | TATA CNG Cars (Tiago iCNG, Tigor iCNG, etc.) | TATA Diesel Cars (Older Tiago, Altroz Diesel, etc.) |
Certified Mileage | ~26–28 km/kg (CNG) | ~23–25 km/l (Diesel) |
Real-World Mileage | ~22–24 km/kg | ~19–21 km/l |
Fuel Tank Capacity | ~60L (water capacity, ~10–12 kg usable CNG) | ~37–40 litres |
Range Per Full Tank | ~250–300 km (CNG) + petrol reserve | ~700–800 km |
Fuel Cost per Unit | ₹80–90 per kg (CNG) | ₹90–95 per litre (Diesel) |
Running Cost (Per km) | ₹3–3.5/km approx. | ₹4.5–5/km approx. |
Dual Fuel Option | Yes (CNG + Petrol) | No (Diesel only) |
Fuel Availability | Limited to urban areas | Widely available across cities and highways |
Long-Distance Suitability | Moderate (needs frequent refill) | Excellent (longer range per tank) |
Ideal User: Who Should Choose What?
Now comes a very important question: who should choose what car options? Well, the thing is quite simple— it totally depends on your lifestyle, fuel availability, and commute habits. Some users need powerful and heavy highway drives. On the other hand, many people prioritize economical city drives. With that, we take you to our next section, where you can find which fuel type fits your needs better.
TATA Diesel Cars: Best For Users Who:
Drives long distances frequently, including field jobs, highway commuters, etc.
Looking for better torque and a stronger performance.
Needs a car that handles heavy loads and hilly terrains well.
Wants a longer driving range per fuel fill.
Lives in an area where diesel is still freely sold and is not restricted.
Can afford slightly higher insurance and maintenance costs.
TATA CNG Cars: Best For You, If:
You want a car for short drives or basic city commutes.
You seek more economical daily running costs.
You are focused on lower emissions and are aware of environmental benefits.
You don’t need a large boot space.
You live in an area with good access to a CNG filling station.
You’re looking for a budget-friendly and fuel-efficient option.
TATA Diesel Cars Pros and Cons
Pros | Cons |
Higher torque and better performance | Diesel prices are generally higher than petrol/CNG |
Excellent for long-distance travelling | Higher initial purchase price |
Better fuel economy on longer routes | Maintenance costs are slightly higher |
Strong load-carrying and hill-driving ability | |
Long range per tank (700-800 km approx.) |
TATA CNG Cars Pros and Cons
Pros | Cons |
Much lower running cost per km | Limited boot space due to the CNG tank |
Overall, low maintenance costs | CNG refill stations may not be available everywhere |
Dual-fuel option (CNG + Petrol) for flexibility | Slight drop in performance with AC or full load |
Environmentally friendly because of reduced emissions | |
Ideal for city commutes and short-distance driving |
READ ALSO: Tata Motors Falling in 2025: Shocking Reasons Behind the Crash!
FAQs
Ques 1. Are TATA CNG cars easier to maintain than diesel cars?
Ans. Yes, CNG cars are much cheaper than diesel ones when it comes to maintenance costs.
Ques 2. Is CNG safe in TATA cars?
Ans. Yes, the factory-fitted CNG cars are reliable and absolutely safe.
Ques 3. Are CNG cars suitable for long drives?
Ans. No, you should prefer petrol or diesel cars for long-distance journeys.
Ques 4. Will the diesel cars get banned soon?
Ans. Some cities will restrict diesel cars in upcoming policies.
Ques 5. Is it possible to convert a TATA diesel to a CNG car?
Ans. No, doing so is neither feasible nor recommended.
Final Verdict: Which One Wins the Battle?
Now that we’re summing up our journey, the verdict goes in favor of the car owner’s needs. That being said, choosing between TATA diesel or CNG completely depends on individual needs. For some, CNG variants might be the ideal choice, whereas for others, diesel variants could be the one-stop destination.
If you’re someone who travels frequently, needs better highway performance, and prefers strong torque, diesel cars will offer more power and range for you. However, if your usage is mostly city-based and your budget is restrained, TATA CNG variants could be the best eco-conscious choice.