The Maruti Suzuki Swift S-CNG Automatic brings together two features that Indian city-car buyers have increasingly looked for: the lower running-cost potential of factory-fitted CNG and the convenience of an automatic transmission. Maruti Suzuki introduced the Swift S-CNG with a 5-speed manual gearbox in 2024, and in September 2026 added a 5-speed Auto Gear Shift (AGS), commonly referred to as an AMT, to the CNG version.
For the Indian market, the new Swift CNG automatic is available in VXi CNG AGS, VXi (O) CNG AGS and ZXi CNG AGS variants. The introductory ex-showroom starting price was ₹7,92,400, while the latest Maruti Suzuki India price page lists the same VXi CNG AGS at ₹7,92,400, VXi (O) CNG AGS at ₹8,18,400 and ZXi CNG AGS at ₹8,86,400.
Its claimed CNG efficiency is 35.34 km/kg, compared with 32.85 km/kg for the earlier Swift S-CNG manual. That figure is a certified test result, not a guarantee of real-world fuel economy.
Quick Answer: What Is the Swift S-CNG Automatic?
The Swift S-CNG Automatic is the India-spec Swift equipped with Maruti Suzuki’s 1.2-liter Z12E three-cylinder engine, factory-fitted S-CNG system and five-speed AGS automated manual transmission.
The key numbers are:
| Specification | Maruti Suzuki Swift S-CNG Automatic |
|---|---|
| Market | India |
| Engine | 1.2-liter Z12E, 3-cylinder |
| Fuel | CNG + petrol |
| Transmission | 5-speed AGS/AMT |
| CNG power | 69.75 PS |
| CNG torque | 101.8 Nm |
| Petrol power | About 82 PS |
| Petrol torque | 112 Nm |
| Claimed CNG efficiency | 35.34 km/kg |
| Petrol tank | 37 liters |
| CNG tank | 55-liter water-filling capacity |
| Seating | 5 |
| Starting price | ₹7,92,400 ex-showroom |
| CNG automatic variants | VXi, VXi (O), ZXi |
The CNG specifications and fuel-tank capacities are based on Maruti Suzuki’s Swift S-CNG information and the company’s September 2026 launch announcement.
Swift S-CNG Automatic Price in India
The Swift S-CNG Automatic starts at ₹7.92 lakh ex-showroom in India.
Maruti Suzuki currently lists three automatic S-CNG variants:
| Variant | Ex-showroom price |
|---|---|
| Swift VXi CNG AGS | ₹7,92,400 |
| Swift VXi (O) CNG AGS | ₹8,18,400 |
| Swift ZXi CNG AGS | ₹8,86,400 |
These are ex-showroom prices. Registration, insurance, road tax and other on-road costs vary by location and buyer configuration. Maruti Suzuki also states that the price prevailing at the time of invoice/bill applies.
The automatic CNG variants carry a ₹35,000 premium over the corresponding CNG manual variants, according to automotive reports following the September 2026 launch.
Swift S-CNG Automatic Mileage: 35.34 km/kg
The headline figure for the new Swift CNG automatic is its claimed 35.34 km/kg CNG efficiency.
That is higher than the 32.85 km/kg certified figure of the manual Swift S-CNG. Maruti Suzuki’s original Swift S-CNG launch identified 32.85 km/kg as the certified efficiency figure for the manual version.
The 35.34 km/kg figure comes from certified testing. It should therefore be treated as a laboratory/test-cycle figure rather than an expected everyday result.
Actual mileage can vary depending on traffic, driving style, air-conditioning use, vehicle load, tire pressures, road conditions and CNG availability.
How Does the Swift CNG Automatic Work?
The most important thing to understand is that the Swift does not use a conventional torque-converter automatic or a continuously variable transmission for its CNG version.
Instead, it uses Maruti Suzuki’s Auto Gear Shift (AGS) system.
AGS is an automated manual transmission. Mechanically, it is based around a manual gearbox, but an intelligent actuator operates the clutch and changes gears for the driver. That means the driver does not need to operate a clutch pedal.
Maruti Suzuki describes the system as a two-pedal setup designed to provide automatic-driving convenience while retaining the efficiency characteristics of a manual-based transmission.
There is also an option for manual gear selection when the driver wants greater control, although the clutch itself remains automated.
Why Pair CNG With AMT?
The combination is particularly relevant for urban driving.
A conventional manual CNG car can be economical, but repeated clutch operation in stop-and-go traffic can become tiring. With AGS, the driver only has accelerator and brake pedals.
At the same time, the CNG powertrain retains the operating-cost advantage associated with compressed natural gas.
The trade-off is that an AMT is structurally different from a smoother conventional automatic. Gear changes can be more noticeable, particularly when accelerating hard or when the transmission is frequently shifting in traffic.
Engine and Performance
The Swift S-CNG Automatic uses Maruti Suzuki’s 1.2-liter Z12E three-cylinder petrol engine with Dual Variable Valve Timing and Idle Start Stop technology.
In CNG operation, the engine produces 69.75 PS at 5,700 rpm and 101.8 Nm at 2,900 rpm.
In petrol operation, published specifications for the current Swift put output at around 82 PS and 112 Nm.
The difference matters because CNG operation produces less power and torque than petrol operation. Drivers moving from the petrol automatic to the CNG automatic should therefore expect a more efficiency-focused setup rather than a performance-oriented one.
The Swift remains a compact hatchback intended primarily for everyday urban and mixed driving. The combination of the relatively small three-cylinder engine, CNG system and AMT is designed around efficiency and convenience rather than outright acceleration.
CNG and Petrol Fuel System
The Swift S-CNG Automatic remains a bi-fuel vehicle.
It can operate using CNG or petrol, with the factory-fitted S-CNG system integrating the two fuel systems into the vehicle.
Maruti Suzuki specifies a 37-liter petrol tank and a CNG cylinder with a 55-liter water-filling capacity.
The CNG system includes features such as an intelligent injection system, stainless-steel pipes and joints, integrated wiring and a microswitch intended to prevent the vehicle from starting during CNG refueling.
The system also uses Idle Start Stop technology. In appropriate conditions, the engine can shut down when the car is stationary and restart when required, helping reduce unnecessary fuel consumption in traffic.
Swift S-CNG Automatic Features
The exact equipment varies by variant, but the automatic CNG Swift retains the main technology and convenience features offered across the relevant Swift grades.
Maruti Suzuki’s current Swift range includes features such as:
- SmartPlay Pro touchscreen infotainment
- Wireless smartphone connectivity
- Automatic climate control on applicable variants
- Wireless charging on applicable variants
- Cruise control on applicable variants
- Six airbags
- Electronic stability control
- Hill-hold assist
- ISOFIX child-seat mounting points
- Rear parking camera on applicable variants
- LED lighting on higher variants
The exact equipment should be checked against the selected variant because features are not identical across VXi, VXi (O) and ZXi versions. Maruti’s current model page confirms the CNG AGS variants and highlights equipment such as the SmartPlay Pro touchscreen, side and curtain airbags and hill-hold assist.
Exterior and Interior
The CNG automatic does not represent a completely new Swift generation. Instead, it expands the existing Swift’s powertrain lineup.
The current-generation Swift has a compact hatchback shape with a relatively upright cabin, short overhangs and the model’s familiar sporty proportions. The CNG system adds mechanical hardware without fundamentally changing the vehicle’s exterior design.
Inside, the Swift retains a five-seat layout. The CNG cylinder is packaged in the rear luggage area, which is an important consideration for buyers who regularly carry large amounts of luggage. Reports on the automatic CNG models identify a 55-liter CNG tank positioned in the boot, while the car continues to retain a spare wheel.
That packaging decision makes the CNG Swift practical for everyday use, but buyers should not expect the same luggage flexibility as a petrol-only hatchback.
Safety Features
The current Swift includes several standard safety systems, including six airbags, electronic stability control, hill-hold assist and ISOFIX child-seat mounts.
The factory-fitted CNG system also incorporates safety measures specific to the gas fuel system. Maruti Suzuki says the system uses stainless-steel pipes and joints to reduce the risk of corrosion and leakage, integrated wire harnesses and a microswitch that prevents engine starting during refueling.
These features should not be confused with advanced driver-assistance systems. The Swift’s CNG automatic is primarily a conventional small hatchback with electronic safety systems rather than a vehicle built around highway automation.
Swift S-CNG Automatic vs Swift S-CNG Manual
The biggest difference is the transmission.
| Feature | Swift S-CNG Manual | Swift S-CNG Automatic |
|---|---|---|
| Engine | 1.2L Z12E | 1.2L Z12E |
| CNG transmission | 5-speed manual | 5-speed AGS/AMT |
| Claimed CNG efficiency | 32.85 km/kg | 35.34 km/kg |
| Clutch pedal | Yes | No |
| City driving convenience | Manual gear changes | Automated gear changes |
| CNG tank | 55L water capacity | 55L water capacity |
| Petrol tank | 37L | 37L |
| Main advantage | Simpler driver control | Two-pedal convenience |
The efficiency figures are certified figures and should not be interpreted as a guarantee that the automatic will always use less CNG in real-world driving. The transmission changes the driving experience as much as the specification sheet suggests.
Is the Swift S-CNG Automatic Good for City Driving?
The powertrain is particularly relevant to buyers who spend substantial time in urban traffic.
The main advantage is straightforward: the driver gets CNG running capability without manually operating the clutch and gear lever.
That can make stop-start traffic less demanding than in the manual CNG version.
The AMT’s behavior is worth understanding before buying, however. An automated manual transmission operates the clutch and gears differently from a traditional automatic. Gear changes can be felt, particularly under harder acceleration.
For a buyer whose priorities are low running costs, compact dimensions and easier city driving, the combination makes practical sense on paper. Buyers who prioritize very smooth gear changes may prefer to compare the Swift’s AGS behavior with other automatic transmission types before making a purchase.
What Are the Limitations?
The Swift S-CNG Automatic has several compromises that buyers should consider.
Boot space is one of them. The CNG cylinder occupies space in the luggage area, so the usable boot arrangement differs from the petrol Swift.
Performance is another. CNG output is lower than petrol output, and the combination is tuned primarily around efficiency.
AMT behavior also matters. The AGS transmission removes the clutch pedal, but it is still an automated manual gearbox rather than a conventional torque-converter automatic or CVT.
Finally, CNG availability varies by location. The financial benefit of choosing CNG depends partly on having convenient access to CNG stations.
Swift S-CNG Automatic: Who Is It For?
The Swift S-CNG Automatic makes the most sense for buyers who have several requirements at the same time:
- They drive regularly in cities.
- They want factory-fitted CNG.
- They prefer an automatic-style two-pedal driving experience.
- They want a compact five-seat hatchback.
- Fuel efficiency is a major priority.
- They can live with reduced luggage flexibility from the CNG cylinder.
It is less compelling for buyers who rarely encounter heavy traffic, want the simplest manual driving experience, or frequently need maximum boot space.
Final Thoughts
The Maruti Suzuki Swift S-CNG Automatic is an important expansion of the Swift lineup rather than a new-generation model. Its main attraction is the combination of a factory-fitted CNG system with a 5-speed AGS automated manual transmission.
For India, the headline figures are a ₹7.92 lakh ex-showroom starting price and a claimed 35.34 km/kg CNG efficiency. The car uses the 1.2-liter Z12E engine, produces 69.75 PS and 101.8 Nm in CNG mode, and retains a 37-liter petrol tank alongside its 55-liter water-capacity CNG cylinder.
The biggest reason to consider it is not outright performance. It is the convenience of driving a CNG hatchback in traffic without a clutch pedal. The main compromises are the AMT’s transmission characteristics and the boot-space implications of the CNG tank.
Prices and equipment can change, so buyers should confirm the exact variant, current ex-showroom price and on-road cost with Maruti Suzuki or an authorized Arena dealer before purchase.
Frequently Asked Questions
What is the price of the Maruti Suzuki Swift S-CNG Automatic?
The Swift S-CNG Automatic starts at ₹7,92,400 ex-showroom in India for the VXi CNG AGS variant. The VXi (O) CNG AGS is listed at ₹8,18,400 and the ZXi CNG AGS at ₹8,86,400 on Maruti Suzuki’s current price page.
What mileage does the Swift S-CNG Automatic deliver?
Maruti Suzuki’s Swift CNG automatic has a claimed 35.34 km/kg CNG efficiency figure. This is a certified test-cycle figure, so actual mileage can vary with driving conditions.
Does the Swift CNG Automatic use an AMT?
Yes. The Swift S-CNG Automatic uses Maruti Suzuki’s five-speed Auto Gear Shift (AGS), which is an automated manual transmission.
What engine does the Swift S-CNG Automatic use?
It uses the 1.2-liter Z12E three-cylinder petrol engine with Dual Variable Valve Timing and Idle Start Stop technology. In CNG mode, it produces 69.75 PS and 101.8 Nm.
How many Swift CNG automatic variants are available?
Maruti Suzuki currently lists three: VXi CNG AGS, VXi (O) CNG AGS and ZXi CNG AGS.
Does the Swift CNG Automatic also have a petrol tank?
Yes. The Swift S-CNG system uses a 37-liter petrol tank along with a CNG cylinder having a 55-liter water-filling capacity.
Is the Swift S-CNG Automatic different from the Swift CNG manual?
The basic engine and factory-fitted S-CNG system are shared, but the automatic version replaces the five-speed manual transmission with a five-speed AGS/AMT. The claimed CNG efficiency is also higher on the automatic version at 35.34 km/kg versus 32.85 km/kg for the manual.
Sources & References
- Maruti Suzuki — Automatic S-CNG Swift, Dzire and Baleno launch announcement
- Maruti Suzuki — Swift price and variants
- Maruti Suzuki — Swift S-CNG specifications and FAQ
- Maruti Suzuki — Swift S-CNG launch information
- Autocar India — Swift and Dzire CNG AMT launch coverage
- CarWale — Swift CNG AMT launch and specifications