Tata Altroz vs i20 vs Baleno vs Glanza – Best Mileage Hatchback?

If you’re planning to buy a stylish yet fuel-efficient premium hatchback in India, chances are that Tata Altroz, Hyundai i20, Maruti Baleno, and Toyota Glanza are already on your shortlist. These four cars are top choices in the premium hatchback segment, and each one has its strengths.

But if you’re confused about which car gives you the best mileage, most boot space, strong engine options, and value for money, then this comparison will help you make a smart decision.

Let’s talk about each option in detail and see how the new Tata Altroz stacks up against its rivals.

Tata Altroz CNG Mileage vs Baleno CNG vs Glanza CNG vs Hyundai i20

Let’s start with the most fuel-efficient variant CNG. With petrol prices rising, CNG cars are becoming a sensible option for daily commuters.

Tata Altroz CNG offers a mileage of 26.90 km/kg, which is impressive. It uses a 1.2L 3-cylinder bi-fuel engine that produces 73.5 PS and 103 Nm in CNG mode, mated to a 5-speed manual gearbox.
However, Maruti Baleno CNG and Toyota Glanza CNG take the lead here with an ARAI-certified mileage of 30.61 km/kg. Both also use a 1.2L bi-fuel engine generating 77.5 PS and 98.5 Nm, paired with a 5-speed manual gearbox.

But here’s the catch — while Baleno and Glanza offer better mileage, they compromise on boot space due to a single large CNG tank. In contrast, Altroz CNG uses a twin-cylinder layout, neatly packed under the boot floor, allowing you 210 litres of usable boot space. This is a big plus if you often carry luggage.

Hyundai i20 doesn’t offer a CNG option yet, so it’s not in the race for CNG lovers.

Tata Altroz Petrol vs Baleno, Glanza & i20 Petrol Mileage

If you prefer petrol for better performance and convenience, here’s how the petrol variants compare:

Altroz Petrol gets a 1.2L naturally aspirated engine producing 88 PS and 115 Nm. It comes with a 5-speed manual, a 6-speed DCA (dual-clutch automatic), and a new 5-speed AMT. While official mileage isn’t out yet, it’s expected to be 18-20 km/l, depending on the transmission.
Maruti Baleno and Toyota Glanza again lead slightly with a 1.2L petrol engine producing 89.7 PS and 113 Nm. Mileage is 22.35 km/l (MT) and 22.94 km/l (AMT) – both great figures for city and highway use.
Hyundai i20 Petrol gets a 1.2L engine too, making 83 PS and 114.7 Nm. It delivers 20-21 km/l with manual and around 20 km/l with the IVT automatic.

So if mileage is your top priority in petrol, Baleno and Glanza are strong picks. But if you’re looking for a wider transmission choice and premium feel, Altroz and i20 are worth considering.

Altroz Diesel – The Only Diesel Hatchback Left Standing

Tata Altroz has one big trump card it is the only premium hatchback currently offering a diesel engine.

It gets a powerful 1.5L turbo diesel that produces 90 PS and 200 Nm, paired with a 5-speed manual gearbox.
The claimed mileage is 23.60 km/l, which makes it a great option for people who do long-distance travel often.

Both Hyundai i20 and Baleno offered diesel variants earlier, but discontinued them due to BS6 emission norms.

So, if you’re someone looking for torque-rich driving and better highway efficiency, Altroz diesel is a rare gem in the hatchback market.

Boot Space & Practicality: Altroz Leads With Smart CNG Packaging

Let’s talk practicality because a car should be useful in daily life too.

Altroz Petrol has 345 litres of boot space, while Baleno and Glanza offer 318 litres.
In CNG variants, Altroz again wins thanks to the twin-cylinder layout offering 210 litres of usable space.
Baleno and Glanza CNG variants reportedly offer only around 100 litres of usable boot space due to the single large tank.
Hyundai i20 petrol offers around 311 litres of boot space, which is decent.

So, if you travel with family or carry luggage often, Altroz has a practical edge, especially in CNG form.

Verdict – Which Premium Hatchback Should You Buy?

If fuel efficiency is your top priority, Baleno CNG and Glanza CNG lead the chart.
If you need a diesel engine for better torque and long drives, Altroz Diesel is your only option.
If boot space and practicality matter to you, Altroz CNG with its dual-tank layout is the smartest pick.
If you want a balance of performance, features, and brand trust, the Hyundai i20 offers a premium experience, though it’s slightly more expensive.

Also, Tata offers a strong safety record Altroz has a 5-star safety rating from Global NCAP, something that gives peace of mind for Indian families.

Official brand links for reference:

Final Thoughts

Choosing a premium hatchback today is all about what suits your lifestyle and priorities. Whether it’s diesel, CNG, boot space, mileage, or brand features — this comparison helps break it down.

For buyers who want mileage + practicality + safety in one package, Tata Altroz (CNG or diesel) makes a strong case.
If fuel economy is your only concern, Baleno and Glanza CNG are good bets.
If brand value, tech features, and driving feel are top on your list, check out the Hyundai i20.

Take a test drive of each, compare on-road prices in your city, and choose what suits your budget and daily needs best.

Tata Altroz vs i20 vs Baleno vs Glanza – Which Offers Best Mileage?