The Maruti Ertiga has been claimed to be capable of achieving a fuel-efficient mileage of 26.11 km/kg using CNG, while the Kia Carnival offers its owners a claimed mileage of up to 14.85 km/l using a diesel automatic transmission. Both models feature seating arrangements that can accommodate seven passengers; however, they differ greatly in their approach to this feature. The Ertiga is considered an economical choice for families needing an MPV, while the Carnival is a high-end model designed to provide optimum passenger comfort within the available space.
Maruti launched the Ertiga in India in 2012, introduced its second generation in 2018 and updated it in 2022. The updated model offers petrol manual, petrol automatic and CNG manual options. The fourth-generation Carnival arrived in India in October 2024 with a 2.2-litre diesel engine and an eight-speed automatic gearbox. This comparison examines their specifications, published real-world mileage and fuel costs to explain what each means for everyday ownership.
Table of Contents
Maruti Ertiga vs Kia Carnival: Specifications
The Maruti Ertiga uses a mild-hybrid 1.5-litre petrol engine, and both petrol variants of the vehicle include mild-hybrid support. Buyers have the option of either a manual five-speed gearbox or an automated six-speed torque converter; however, the CNG-equipped models include only a manual transmission option. Buyers can select between models that are priced lower and provide more control over driving within traffic situations, or models that provide greater fuel efficiency. The Ertiga’s model range does not include any models equipped with automatic CNG transmissions.
The Carnival’s 2.2-litre turbo-diesel engine and eight-speed automatic suit a substantially larger vehicle. Its second-row captain’s seats, wider body and longer wheelbase make passenger accommodation central to its appeal. However, carrying a larger vehicle through repeated acceleration and braking demands more energy. Diesel’s lower assumed price per litre does not automatically give the Carnival a lower cost per kilometre than the Ertiga.
| Specification | Maruti Ertiga | Kia Carnival |
| Engine capacity | 1,462 cc | 2,151 cc |
| Fuel options | Petrol and petrol-CNG | Diesel |
| Manual transmission | Five-speed | Not offered |
| Automatic transmission | Six-speed, petrol only | Eight-speed |
| Seating configuration | 7 seats (2-3-2 layout) | 7 seats (2-2-3 layout) |
| Length | 4,395 mm | 5,155 mm |
| Width | 1,735 mm | 1,995 mm |
| Wheelbase | 2,740 mm | 3,090 mm |
| Liquid-fuel tank capacity | 45 litres of petrol | 72 litres of diesel |
Carnival has a length of 760 mm and a width of 260 mm more than Ertiga. Those dimensions create a difference when it comes to driving on a narrow street, parking and space for passengers. Families that sometimes use seven seats may find Ertiga beneficial due to its compact size. Those who often drive with passengers in three working rows should consider the Carnival, which is more spacious. Besides, the arrangement of seats differs as well—the Ertiga has three passengers in the middle row, while the Carnival has two passengers in the second row and three in the trunk. Think about the seats you are going to use the most in your family.
Maruti Ertiga vs Kia Carnival: ARAI Mileage Figures
The Ertiga petrol manual has a claimed fuel efficiency of 20.51 km/l, compared with 20.30 km/l for the petrol automatic. That narrow difference makes the automatic appealing to buyers who want convenience without a substantial reduction in certified efficiency. However, certification figures cannot predict the exact gap on an individual commute, particularly when driving involves short journeys and frequent stops.
The Ertiga CNG has recorded a mileage of 26.11 km/kg, while the Carnival diesel automatic has a mileage of 14.85 km/l. Because the mileage of the CNG is measured in kg, we cannot conduct a direct comparison with petrol and diesel vehicles to see how much advantage exists. To conduct a proper financial comparison, we need to convert all three kinds of fuel into monetary units to see how much it costs per kilometre travelled.
| Model and powertrain | Claimed mileage |
| Ertiga petrol manual | 20.51 km/l |
| Ertiga petrol automatic | 20.30 km/l |
| Ertiga CNG manual | 26.11 km/kg |
| Carnival diesel automatic | 14.85 km/l |
The stated mileage gives a reference for comparing different vehicles; however, we cannot treat it as a warranty of real-life performance. Actual fuel consumption does not solely depend on the engine’s potential; it depends on passenger load, usage of air conditioning, power of road inclines and vehicle idle time. An individual driving in suburban traffic conditions is likely to have a completely different consumption level than another individual driving the same distance in heavy traffic jams.
Also Read: Ultimate Guide to Selling Your Maruti Suzuki Ertiga
Maruti Ertiga vs Kia Carnival: Real-World Fuel Efficiency
The strongest mixed-use evidence identified for the updated Ertiga is a CNG road test that returned 22.32 km/kg. The vehicle covered 100.9 km and consumed 4.52 kg of CNG. Another test recorded 18.01 km/kg in the city and 35.60 km/kg on the highway. That unusually high highway result illustrates what one test achieved; it should not become a routine expectation for every journey.
| Version | Published real-world result | What the result represents |
| Ertiga petrol manual | Comparable city/highway figures not verified | No measured figure assigned here |
| Ertiga petrol automatic | Comparable city/highway figures not verified | No measured figure assigned here |
| Ertiga CNG manual | 22.32 km/kg | Mixed city and highway road test |
| Ertiga CNG manual | 18.01 city / 35.60 highway km/kg | Separate city and highway road test |
| Carnival diesel automatic | 7.24 city / 10.80 highway km/l | Published city and highway test results |
The results for the Carnival of 7.24 km/l in urban areas and 10.80 km/l on highways are less than the mileage it claims. This affects the way the car runs, since choosing the route makes a big difference in costs. Someone who travels mostly from city to city should not only refer to the city result, but a person who rides through traffic jams should avoid budget calculations based on the published result. Since these tests were done separately, there isn’t an exact fuel consumption efficiency comparison.
For the updated petrol Ertiga, a consistent, comparable city/highway test was not verified during research. Owner reports can offer context, but they should not be presented as controlled test results. In either MPV, smooth acceleration, appropriate tyre pressures and avoiding unnecessary idling help manage consumption. For the CNG Ertiga, practical considerations also include filling-station access and the luggage space occupied by the cylinder, especially when every seat is needed.
Also Read: Complete Guide to Buying a Kia Carnival
Maruti Ertiga vs Kia Carnival: Fuel Cost Comparison
For purposes of comparison, it is assumed that each one of the vehicles in question is used for a distance of 1,000 km each month, while petrol prices equal ₹105/litre, diesel prices are set at ₹95/litre, and CNG prices are ₹80/kg. The calculations assume that the mileage of the manual Ertiga is 15 km/l, that of the automatic Ertiga is 14 km/l, the mileage of the CNG variant is 22 km/kg, while the mileage of the Carnival is 10 km/l. Note that the values referred to here should not be interpreted as actual figures, performance outcomes or the average price of fuel in the country.
| Version | Mileage used for budgeting | Fuel cost/km | Monthly fuel cost | Annual fuel cost |
| Ertiga petrol manual | 15 km/l | ₹7.00 | ₹7,000 | ₹84,000 |
| Ertiga petrol automatic | 14 km/l | ₹7.50 | ₹7,500 | ₹90,000 |
| Ertiga CNG manual | 22 km/kg | ₹3.64 | ₹3,636 | ₹43,636 |
| Carnival diesel automatic | 10 km/l | ₹9.50 | ₹9,500 | ₹1,14,000 |
Based on this usage, the manual petrol Ertiga shows annual savings of ₹30,000 in relation to the Carnival, while the automatic variant of the Ertiga is estimated to save ₹24,000. The CNG variant shows approximately ₹70,364inf savings per year. Note that the ratios will change if the distance is changed under the assumption that costs of fuel and mileage will not change correspondingly. However, the published urban results for Carnival will help to determine costs per km of approximately ₹13.12. The results can be recalculated using local fuel prices and expected mileage multiplied by monthly distance.
The CNG purchase premium is best assessed against an equivalent petrol Ertiga. The VXi CNG costs ₹98,500 more ex-showroom than the VXi petrol manual. At the assumed running costs, its saving of approximately ₹3.36/km recovers that premium in around 29,300 km, or roughly 29 months at 1,000 km per month. This calculation excludes differences in registration, insurance, financing and maintenance, plus petrol consumed by the CNG vehicle. Drivers covering fewer kilometres will need longer to recover the additional purchase cost. Frequent detours to a CNG station also add distance, while queues add time. Include those practical costs when judging whether the saving works for your routine.
Maruti Ertiga vs Kia Carnival: Price Comparison
The Ertiga has ex-showroom prices ranging from about ₹8.90 lakh to ₹13.14 lakh, while the Carnival Limousine Plus diesel automatic is priced at around ₹59.65 lakh. This huge price difference changes the buying decision before one considers fuel costs. Both cars have seating for seven people, but the price of the Carnival suggests that it offers much better facilities, equipment, and comfort for passengers. Those looking for automatics should reasonably compare the Carnival with the Ertiga automatic series, which starts at ₹11.30 lakh, rather than only referring to the base manual price of the Ertiga.
| Powertrain or variant | Maruti Ertiga ex-showroom price | Kia Carnival ex-showroom price |
| Petrol manual range | ₹8.90–₹11.79 lakh | Not offered |
| Petrol automatic range | ₹11.30–₹13.14 lakh | Not offered |
| Factory CNG range | ₹10.94–₹12.00 lakh | Not offered |
| Limousine Plus diesel automatic | Not offered | ₹59.65 lakh |
The Carnival is roughly ₹46.51 lakh more expensive than the most expensive Ertiga mentioned here. Therefore, what a potential customer pays for depends on how much value they give to the extra space available in the car, the individual second-row seats, and the electric sliding doors. If a buyer wants a car merely for transporting their family in an affordable way, they would probably not benefit much from going beyond a limited budget just to own a diesel-powered vehicle. On the contrary, if they regularly travel with a few adults without compromising on comfort, the amount of space in the car may be a crucial point.
These prices are rounded and exclude registration, insurance and other applicable charges. Obtain quotations for the exact variants before calculating the total difference. For used examples, match each vehicle’s model year, engine and gearbox to the relevant mileage information. The earlier Ertiga automatic used a different transmission, while the previous Indian Carnival belongs to another generation. Their lower used-car prices do not make the current models’ mileage figures directly applicable.
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Summary
When it comes to family transport, the cost-effective Maruti Ertiga is the best option for those seeking good fuel savings. The manual petrol variant keeps the price of purchase low, while the automatic convenience kicks in when driving in stop-and-go conditions. On the other hand, the CNG model makes the cheapest fuel choice for the prospective buyer here, with an average performance of 22.32 km/kg for normal use in the real world. The CNG variant suits better if the distance to be traversed is not long enough; it offers the opportunity for convenient refuelling and ample luggage space.
The Kia Carnival suits buyers prepared to pay substantially more for passenger space and comfort. Its diesel engine provides a different driving experience, but the published test figures show why realistic fuel budgeting matters. For frequent urban journeys, allow for consumption well above what the claimed mileage suggests. Choose between these MPVs by weighing total ownership expenditure against the space and comfort you will actually use.
FAQs
Q. Which is more fuel-efficient, the Maruti Ertiga or Kia Carnival?
The Ertiga petrol has higher claimed mileage than the Carnival diesel. Its CNG version also delivers a lower fuel cost under the assumptions used here. However, the available road tests were conducted separately, so they cannot establish an exact efficiency advantage under identical conditions.
Q. What is the Ertiga CNG’s real-world mileage?
A documented mixed city and highway test returned 22.32 km/kg. Another test recorded 18.01 km/kg in the city and 35.60 km/kg on the highway. The mixed-use result offers a useful reference, while actual consumption depends on the route, load and driving style.
Q. What mileage does the Kia Carnival deliver in city driving?
A published test recorded 7.24 km/l in the city for the current diesel automatic. This is one test result, rather than a guaranteed owner average. At an assumed diesel price of ₹95/litre, it translates to approximately ₹13.12 per kilometre in fuel expenditure.
Q. Is the Ertiga automatic much less efficient than the manual?
Their claimed figures are close: 20.30 km/l for the automatic and 20.51 km/l for the manual. Everyday results can differ more depending on traffic and driving technique. Buyers should balance the automatic’s convenience against its purchase premium and their expected running costs.
Q. When does the Ertiga CNG recover its higher purchase price?
Using the VXi variants and this comparison’s fuel-price and mileage assumptions, the ₹98,500 ex-showroom premium is recovered after approximately 29,300 km. That takes around 29 months at 1,000 km monthly, or roughly 59 months at 500 km monthly, before other ownership-cost differences.
Q. Which MPV is better for regular family highway travel?
The Ertiga suits families prioritising purchase affordability and lower running costs. The Carnival deserves consideration when additional passenger room and second-row comfort justify its much higher price. Assess both with your usual passengers and luggage, particularly if all seven seats will regularly be occupied.
