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The Bajaj Freedom 125 can run on CNG or petrol, but CNG is cheaper per kilometre only when local fuel prices, real-world mileage and station access make it so. Bajaj quotes 100 km/kg on CNG and 100 km/L on petrol; Autocar India’s reported figures are lower, and its CNG and petrol results vary between city and highway riding. The 2 kg CNG cylinder is the main fuel supply, while the 2 L petrol tank is an auxiliary fallback—not a like-for-like alternative range tank.
This comparison is based on published India-market specifications and figures. Use local fuel prices and realistic mileage for your route before deciding which fuel will cost less. A short CNG nozzle-on time does not include travelling to a station or waiting in a queue.
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At a glance
| Name | Best for | Key spec | Checked |
|---|---|---|---|
| CNG | Riders with convenient CNG access who want to compare fuel cost per kilometre | 2 kg rated cylinder; Bajaj claim: 100 km/kg; Autocar India reported 94 km/kg city and 126 km/kg highway | November 2026 |
| Petrol | Backup use and routes where CNG is unavailable or inconvenient | 2 L auxiliary tank, including 0.5 L reserve; Bajaj claim: 100 km/L; Autocar India reported 53.4 km/L city and 62.37 km/L highway | November 2026 |
Mileage figures are attributed to their publishers, not guaranteed results. Autocar India’s values are reported test figures; actual economy can differ with conditions and riding.
Which is cheaper to run: CNG or petrol?
CNG costs less per kilometre when the price of a kilogram of CNG divided by the Freedom 125’s actual km/kg is below the price of a litre of petrol divided by its actual km/L. There is no single reliable saving figure for every owner: fuel prices differ by location and date, and mileage varies with traffic, speed, load, temperature, riding style and fuel fill.
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Use these calculations with prices from the city where you normally refuel:
- CNG cost per km = local CNG price per kg ÷ your chosen CNG mileage in km/kg.
- Petrol cost per km = local petrol price per litre ÷ your chosen petrol mileage in km/L.
- Estimated fuel saving per 100 km on CNG = 100 × (petrol cost per km − CNG cost per km).
For example, if CNG costs C rupees per kg and petrol costs P rupees per litre, plug those local prices into the formulas rather than relying on a national average. To estimate a cautious comparison, use 94 km/kg for CNG city riding and 53.4 km/L for petrol city riding, the figures reported by Autocar India. For a manufacturer-claim scenario, use 100 km/kg and 100 km/L, which are the figures in Bajaj Auto’s Freedom 125 product FAQ. These are alternative scenarios, not a promise that either figure will match your commute.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsKeep the comparison like-for-like. A city petrol figure should be compared with a city CNG figure, and highway estimates with highway estimates. Autocar India reports 126 km/kg on CNG and 62.37 km/L on petrol for highway testing; it reports 94 km/kg and 53.4 km/L respectively in city testing. Plug the matching pair into the formula for the type of riding you do. If your week is a mix of traffic and open roads, estimate each part separately or use an average you can justify from your own fuel records.
You can also use the figures to find a break-even CNG price rather than guessing whether gas is cheaper. Multiply the local petrol price per litre by the CNG mileage you expect, then divide by the petrol mileage you expect. That gives the CNG price per kilogram at which the two fuels have the same calculated cost per kilometre. Below that price, CNG is cheaper under those assumptions; above it, petrol is. The result changes if you change either mileage estimate, so the calculation is a comparison tool, not a fixed property of the bike.
If you switch between fuels during a week, compare the cost of the fuel actually consumed rather than treating every kilometre as a CNG kilometre. Keep separate notes of the amount and price of each fuel, then divide the combined fuel spend by the distance travelled over the same period. This gives an overall operating cost for your mixed-fuel pattern. It also makes clear whether petrol is merely an occasional bridge between CNG stations or a regular part of your riding.
Bajaj’s FAQ asks, “How will I save 50% on the riding cost with the Bajaj Freedom 125 NG04 Disc LED?” Its published explanation qualifies savings: “Actual running-cost savings depend on fuel prices, riding conditions and usage.” The company’s percentage claim is relative to equivalent petrol motorcycles; it should not be treated as a guaranteed saving for every Freedom owner. Your result depends on both the local price gap and the economy you actually achieve.
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A simple log makes the estimate more useful: record the amount paid, quantity filled and distance covered over several refills, noting which fuel was used and whether the riding was mostly city or highway. Do not infer a precise cost from a single short trip or an incomplete fill. Compare cost per kilometre over a similar period and route, and update the calculation if your fuel prices change.
How far can the Freedom 125 go on each fuel?
The Freedom has a 2 kg-rated CNG cylinder and a 2 L petrol tank, so its two fuel supplies do not provide interchangeable ranges. CNG is intended to do most of the running; the smaller petrol tank provides a way to continue when CNG is not available nearby.
The 2026 owner’s manual lists a 12.5 L CNG cylinder rated as 2 kg at 200 bar and 15°C, plus a 2 L petrol tank with a 0.5 L reserve. These are nominal specifications. They do not guarantee that every station fill will accept precisely 2 kg: the amount dispensed can depend on fill conditions, including pressure and temperature.
The petrol reserve is part of the stated 2 L tank capacity, not an additional half-litre on top of it. That distinction matters when planning a route: the petrol supply is limited even if a rider wants to keep it for an unexpected gap in CNG access. Neither nominal capacity should be mistaken for a promise that the full amount will be available in every circumstance.
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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Range is a calculation, not a fixed property of the motorcycle: fuel available multiplied by the economy achieved. At the stated 100 km/kg CNG claim, 2 kg suggests about 200 km on CNG; at Autocar India’s reported 94 km/kg city figure, the arithmetic implies about 188 km, and at its 126 km/kg highway figure it implies about 252 km. Those calculations are illustrative, because actual accepted fuel quantity and achieved economy can differ.
Published combined-range figures also differ. Bajaj’s 17 January 2025 press release says 200+ km on 2 kg of CNG and approximately 330 km combined. Autocar India’s model page reports more than 350 km combined, with the result dependent on riding style and fuel fill. Treat these as separate publisher figures, not a single guaranteed range. The total depends on how much fuel is actually in each tank, how efficiently the bike is ridden and when the rider switches fuels.
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The difference between the combined figures is a reason to plan conservatively, not to assume one source is a promise for every ride. A combined figure includes both fuels, whereas a CNG-only estimate describes a single supply. If your journey depends on reaching a particular pump, allow for variation in mileage and fill quantity rather than using the highest published range as your endpoint.
Do not calculate the petrol-only range by treating 2 L as if it were a full-size petrol tank. At the claimed 100 km/L, multiplying by 2 L gives a theoretical 200 km, but that combines a manufacturer economy claim with nominal tank capacity and should not be presented as assured usable range. The 0.5 L reserve is included in the 2 L petrol capacity, not extra capacity on top of it. The tank’s auxiliary role matters most when CNG access is unavailable, not as a reason to plan a long petrol-only trip without refuelling options.
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How long does CNG refuelling take?
The reported time for the CNG nozzle to fill the motorcycle is roughly one to a couple of minutes in the cited conditions. That is not the same as total time added to a journey: travel to a station, waiting, payment and access all affect the stop.
A Bajaj Auto earnings-call transcript from 16 October 2024 describes filling as taking less than a minute to a couple of minutes. AckoDrive reports observing about one minute to fill 1 kg and estimates about two minutes for a full fill under good pressure. These are reported timings, not a national average or a guarantee for every station. The available evidence does not establish a reliable current national average for queues or total stop time.
Petrol is filled separately into the small auxiliary tank. The practical comparison is therefore not simply “CNG takes two minutes, petrol takes longer.” It is whether a suitable CNG station is accessible on your normal route and whether its queue and location make the extra stop worthwhile. A nearby, quiet station may make the short nozzle-on interval convenient; a long detour or queue can outweigh it even if the fuel itself is cheaper.
When evaluating a refuelling stop, separate the time at the nozzle from the time spent getting there and waiting. A station directly on a regular route could fit into an existing stop, while a distant station may add a meaningful detour. The published fill estimates cannot predict either case. Check the stations you would actually use, their location relative to your commute and the times you normally pass them; do not turn a reported one-to-two-minute fill into an assumed total stop time.
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How do I refill CNG in the Bajaj Freedom?
Follow the motorcycle’s owner’s manual and the station attendant’s instructions. Bajaj’s manual says to get off the vehicle during CNG filling, and to refit the filler dust plug properly after refuelling.
- Stop at a CNG station and get off the motorcycle before filling.
- Open the fuel cover and remove the CNG filler dust plug as directed in the owner’s manual.
- Have the CNG filled through the CNG valve, following station procedure.
- When filling is complete, refit the dust plug properly and close the fuel cover.
Do not treat the rated 2 kg cylinder capacity as a target that every fill must reach. The manual specifies the rating at 200 bar and 15°C, while actual fill quantity can vary. Bajaj states that the cylinder is PESO-certified and advises owners to have the CNG system inspected at an authorised Bajaj service centre. This is a manufacturer statement and service instruction, not an independent assessment of safety performance.
The published procedure is straightforward, but the owner’s manual remains the reference for the exact operation on the motorcycle. Get off before filling and make sure the dust plug is replaced properly afterward; do not infer from a quick nozzle-on estimate that the steps or station instructions can be skipped.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When does petrol backup make the most difference?
Petrol backup is most useful when a rider has a CNG gap in a route, a station is temporarily unavailable or the rider cannot conveniently reach a CNG pump before needing fuel. Bajaj says riders can switch between fuels and use petrol when CNG is not nearby; the auxiliary tank exists for that flexibility.
For an urban commute, map the CNG stations along the actual journey rather than counting stations across a whole city. Consider whether the pump is open when you travel, whether entering and leaving it adds a detour, and whether a queue would disrupt your schedule. If you can refuel CNG routinely without a major diversion, the bike’s CNG running-cost case is easier to realise. If access is sporadic, the small petrol tank provides a fallback but does not remove the need to plan where to refuel.
For longer rides, plan around both fuels without assuming that the published combined range is guaranteed. Bajaj’s approximately 330 km and Autocar India’s more-than-350-km figures have different sources and qualifications. Route, riding conditions, usable fuel and station availability can all change the distance achievable. Identify CNG stops on the route and keep a petrol option in mind where CNG is absent; do not wait until the CNG supply is exhausted to begin looking for a suitable alternative.
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It is useful to think of the fuels as serving different roles rather than as two equal tanks. CNG provides the main running-cost opportunity when it is accessible; petrol adds flexibility for a gap or an inconvenient station. If your route has dependable CNG access, the backup may be used only occasionally. If you regularly rely on petrol because CNG is hard to reach, include that pattern in the cost calculation instead of assuming all riding benefits from CNG pricing.
Which fuel should you choose for your riding?
Choose based on the combination of cost and convenience, rather than mileage claims in isolation. The comparison is strongest when you use the prices you pay, mileage assumptions that match your riding and a realistic view of fuel-station access.
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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11- Mostly city riding with convenient CNG: Compare the reported city figures—94 km/kg CNG and 53.4 km/L petrol from Autocar India—with current local prices. If your calculation shows meaningful savings and station stops fit your routine, CNG may make more economic sense.
- Mostly highway riding: Use the matching reported highway figures, 126 km/kg CNG and 62.37 km/L petrol, as an estimate rather than a guarantee. Check station availability along the route, not only at the destination.
- Infrequent or inconvenient CNG access: Give the time and detour cost real weight. Petrol fallback can help bridge a gap, but the 2 L tank is small and should not be treated as a substitute for regular CNG access on long routes.
- Uncertain local prices or mileage: Calculate both a manufacturer-claim case and a test-figure case, then check whether CNG remains cheaper under both. If the result reverses between scenarios, actual economy and access are likely decisive for your use.
The Freedom 125’s CNG-versus-petrol decision is therefore local. CNG offers the potential for lower running cost and substantial range from its rated cylinder, while petrol gives the rider a separate, limited fallback. The right comparison includes per-kilometre fuel cost, usable range, station access and total refuelling stop time—not just the pump price or the manufacturer’s headline mileage.
Frequently Asked Questions
Does the Freedom 125 always take exactly 2 kg of CNG?
No. The manual describes a cylinder rated as 2 kg at 200 bar and 15°C, but that is a nominal specification rather than a promise about every fill. The quantity accepted can vary with filling conditions.
Can I ride the Bajaj Freedom 125 using petrol only?
Bajaj describes petrol as an auxiliary option riders can switch to when needed, and the motorcycle has a separate 2 L petrol tank. Because that tank is small, petrol-only use should be planned around refuelling rather than treated as equivalent to the CNG supply.
Does Bajaj’s 50% running-cost saving apply in every city?
No fixed percentage applies everywhere. Bajaj says actual savings depend on fuel prices, riding conditions and usage, so the useful figure is the one calculated from your local pump prices and realistic mileage.
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Will CNG refuelling add only about two minutes to a trip?
The cited one-to-two-minute estimates concern filling time under reported conditions, not the whole stop. A detour, queue, station access and other delays can make the total time longer.
How will I save 50% on the riding cost with the Bajaj Freedom 125 NG04 Disc LED?
That is the phrasing of a question on Bajaj’s product FAQ, not a guaranteed result for every rider. Bajaj says actual running-cost savings depend on fuel prices, riding conditions and usage. Compare local prices using realistic, like-for-like mileage figures.
The Bottom Line
Bottom line: The Freedom 125’s CNG advantage depends on your local price per kilogram, the mileage you actually achieve and convenient access to a pump. Compare city with city or highway with highway, treat published range and economy as estimates, and remember that the 2 L petrol tank is a limited fallback. The one-to-two-minute CNG filling estimates describe nozzle time—not a complete station stop.
