The Maruti Wagon R has always been one of India's most sensible cars. But now it comes with a choice that can leave any buyer scratching their head — petrol, CNG, or the brand-new flex fuel. Three fuel types, three different price tags, and three very different running costs.
So which Wagon R actually makes sense for you? In this simple, no-nonsense comparison, we break down the Wagon R Flex Fuel, petrol, and CNG side by side — on price, mileage, running cost, and real-world practicality — so you can pick the right one without any confusion.
Quick answer first
If you are short on time, here is the short version. The CNG Wagon R is the smartest choice for most buyers today, thanks to the lowest running cost and a ready fuel network. The petrol version is best if you want simplicity, better boot space, and an automatic option. The flex fuel version is the future-ready choice, but it makes full sense only once E85 pumps spread across India.
Now let us look at each one properly.
The three Wagon R options explained
Before the comparison, here is what each fuel type actually means.
Petrol is the standard Wagon R that runs on regular petrol (which is already E20 — 20% ethanol). Simple, proven, available everywhere.
CNG is the factory-fitted CNG version. It runs on compressed natural gas, which is much cheaper than petrol, and it can also switch to petrol when needed.
Flex fuel is the newest option. Launched in 2026, it can run on any ethanol blend from E20 all the way up to E85 (85% ethanol). It has an ethanol sensor that adjusts the engine automatically based on the fuel in the tank.
Wagon R price comparison (2026)
Let us start with what hits your pocket first — the price. All figures below are ex-showroom and approximate.
A few things stand out here. The petrol version is the cheapest to buy. The CNG version costs roughly ₹90,000 more than the equivalent petrol variant because of the factory-fitted CNG kit. And the flex fuel version, offered only in the fully loaded ZXi Plus trim, sits at the top—commanding a premium of over ₹75,000 above the equivalent petrol-manual variant.
Wagon R mileage comparison
Mileage is where these three really separate. Here are the claimed (ARAI) figures.
In the real world, expect the petrol to return roughly 14-16 kmpl in the city and 18-20 kmpl on the highway. The CNG stretches much further — around 22-24 km/kg in the city and 26-28 km/kg on the highway.
Now for the flex fuel catch, and this is important: ethanol has less energy than petrol. So when you run the flex fuel car on high blends like E85, you will actually get fewer kilometres per litre than petrol. The saving only works if ethanol is priced low enough at the pump to make up for that drop.
Running cost: the real deciding factor
Buying price is only half the story. What you spend at the pump every month matters far more over the years.
CNG is the clear winner on running cost. CNG is significantly cheaper per unit than petrol, and combined with that 34 km/kg efficiency, it gives the lowest cost per kilometer by far. This is exactly why taxi drivers and high-mileage users love the CNG Wagon R. One thing to note, though—CNG prices have climbed in recent times, so the gap over petrol is smaller than it used to be.
Petrol sits in the middle. Higher fuel cost than CNG, but no compromises on boot space or convenience.
Flex fuel depends entirely on ethanol pricing. On paper, ethanol should be cheaper than petrol. But because you burn more of it for the same distance, the actual saving is modest unless ethanol is priced attractively. Right now, the maths only works out well in cities where E85 is both available and cheap.
Practicality and everyday use
Numbers aside, how do these three feel to live with?
Petrol is the most hassle-free. Full boot space (341 litres), the option of an automatic gearbox for easy city driving, and fuel available at every corner.
CNG saves money but costs you boot space — the CNG cylinder eats into the luggage area, leaving very little room. It is also manual-only, and you may need to queue at CNG stations, which are fewer than petrol pumps. For city families who prioritise savings over boot space, it is still worth it.
Flex fuel keeps the full features of the top ZXi Plus trim and the convenience of a petrol-style engine. The only real limitation is the fuel network — high ethanol blends like E85 are available at just a handful of stations for now, mostly in Delhi-NCR and the Mumbai-Pune-Nagpur belt. The good news is it also runs on normal E20 petrol everywhere, so you are never stuck.
The fuel availability reality
This is the point that decides a lot for Indian buyers.
- Petrol — available literally everywhere. Zero worry.
- CNG — widely available in cities and along highways, though not as dense as petrol pumps. Growing steadily.
- Flex fuel (E85) — available at only around 50-100 stations today. The government plans about 500 by end of 2026 and nearly 5,000 by end of 2027, but that network is still being built.
So which Wagon R should you buy?
Here is the honest, simple verdict based on your needs.
Buy the CNG Wagon R if you do high daily running, want the lowest fuel bills, and mostly drive in the city where CNG is available. You will make back that extra cost quickly, and it remains the value king for most Indian buyers.
Buy the petrol Wagon R if you want the lowest buying price, need the full boot space, prefer an automatic gearbox, or drive in areas without good CNG coverage. It is the simplest, most flexible choice.
Buy the flex fuel Wagon R if you live in Delhi-NCR or the Mumbai-Pune-Nagpur belt where E85 is available, and you want to support cleaner, home-grown fuel. It is a forward-looking choice — but for most people outside those pockets, it makes more sense to wait until the ethanol pump network grows.
My simple tip: for the average buyer today, the CNG Wagon R offers the best balance of price and savings. The flex fuel version is exciting and important for India's future, but its full benefit is still a year or two away for most cities.
Frequently Asked Questions
What is the price of the Wagon R Flex Fuel? The Maruti Wagon R Flex Fuel launched in 2026 at ₹7.24 lakh (ex-showroom), available in a single fully-loaded ZXi Plus variant.
Which Wagon R has the best mileage? The CNG Wagon R has the best real-world efficiency at around 34 km/kg (claimed), making it the cheapest to run. The petrol returns around 24-25 kmpl (claimed).
Does the flex fuel Wagon R give less mileage than petrol? Yes, on high ethanol blends like E85. Ethanol has less energy than petrol, so you cover fewer kilometres per litre. The savings depend on ethanol being cheaper at the pump.
Is CNG or flex fuel cheaper to run? For most buyers today, CNG is cheaper to run because of its low fuel cost and high efficiency, plus a wider pump network. Flex fuel savings depend heavily on local ethanol pricing and availability.
Can the flex fuel Wagon R run on normal petrol? Yes. It runs on any blend from E20 (normal pump petrol, available everywhere) up to E85. So you are never stranded, even where E85 is unavailable.
Which Wagon R should I buy for city use? For high city running, the CNG Wagon R gives the lowest running cost. If you want convenience, boot space, or an automatic, go for the petrol. Flex fuel makes sense mainly if you live where E85 is available.
