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Toyota Glanza CNG vs Tata Altroz iCNG: Mileage, Specifications and Features Compared
Toyota Glanza CNG delivers segment-leading 33.61 km/kg of mileage Tata Altroz iCNG returns 26.20 km/kg of fuel efficiency
Customers in India are looking to buy vehicles that offer low running costs without compromising on features. In the premium hatchback segment, two strong options are the new Toyota Glanza e-CNG and the Tata Altroz iCNG. While the Glanza facelift focuses on class-leading fuel economy, LEVEL 2 ADAS tech and refinement, the Tata Altroz relies on its twin-cylinder technology, usable boot space, and a 5-star safety rating
Here is a detailed comparison of how these two premium CNG hatchbacks compare across fuel efficiency, performance, practical luggage space and tech
1. Mileage & Running Costs: Fuel Efficiency Leader
|
Specs |
Toyota Glanza E-CNG Facelift |
Tata Altroz iCNG |
|
ARAI Mileage (Manual) |
33.61 km/kg |
26.20 – 27.80 km/kg |
|
ARAI Mileage (Automatic) |
34.47 km/kg (AMT) |
~26.20 km/kg (AMT) |
|
Transmissions Offered |
5-Speed Manual & 5-Speed AMT |
5-Speed Manual & 5-Speed AMT |
|
Direct-Start in CNG Mode |
No (Starts on Petrol) |
Yes (Direct-Start in CNG) |
For CNG buyers, fuel efficiency is the top priority. The Glanza takes the lead in certified fuel economy, while the Altroz provides competitive range. However, both models offer automatic gearboxes in their CNG lineups.
Toyota Glanza CNG: Delivers a fuel efficiency of 33.61 km/kg with manual gearbox, keeping per-kilometre running costs exceptionally low during daily city commutes. The Glanza CNG AMT version delivers an even higher 34.47 km/kg, making it the most fuel-efficient CNG hatchback in its class.
Tata Altroz iCNG: it offers a certified fuel economy of 26.20 km/kg to 27.80 km/kg. The official mileage figure is lower than the Glanza hatchback. The Altroz iCNG includes a Single Advanced ECU that allows the engine to start directly in CNG mode, reducing daily petrol consumption during cold starts.
2. Powertrain & Engine Performance
|
Specs |
Toyota Glanza E-CNG Facelift |
Tata Altroz iCNG |
|
Engine Configuration |
1.2L 3-Cylinder Z12E Petrol / CNG |
1.2L 3-Cylinder Revotron iCNG |
|
Power Output (CNG Mode) |
70 PS (51.3 kW) @ 5,700 rpm |
73.5 PS (72.5 bhp) @ 6,000 rpm |
|
Torque Output (CNG Mode) |
101.8 Nm @ 2,900 rpm |
103 Nm @ 3,500 rpm |
|
Power Output (Petrol Mode) |
83 PS (61 kW) @ 5,700 rpm |
88 PS @ 6,000 rpm |
|
Torque Output (Petrol Mode) |
112.4 Nm @ 4,500 rpm |
115 Nm @ 3,250 rpm |
Under the bonnet, both hatchbacks use 1.2-litre engines calibrated for dual-fuel option.
Glanza Drive Character: The Z-Series engine delivers its peak CNG torque lower in the rev range (101.8 Nm at 2,900 rpm), offering smooth power delivery and reduced gear shifts during urban commutes.
Altroz Drive Character:This one offers slightly higher peak output in CNG mode (73.5 PS / 103 Nm) providing linear acceleration and predictable highway causing speeds.
Boot Space and Cylinder Packaging
The biggest practical distinction between these two hatchbacks lies in how their CNG storage systems are packaged into the chassis:
Tata Altroz iCNG (Packaging Winner): Tata’s twin-cylinder technology places two 30-litre CNG tanks underneath the boot floorboard, leaving 20-litres of flat, usable luggage space capable of holding full-sized suitcases.
Toyota Glanza e-CNG: it uses a single, large 55-litres cylinder mounted inside the boot, which significantly reduces vertical cargo space and limits luggage capacity compared to the Altroz.
Dimensions, Safety and Cabin Technology
|
Feature |
Toyota Glanza E-CNG Facelift |
Tata Altroz iCNG |
|
Length x Width x Height |
3,990 mm x 1,745 mm x 1,530 mm |
3,990 mm x 1,755 mm x 1,523 mm |
|
Wheelbase / Turning Radius |
2,520 mm / 4.85 m |
2,501 mm / 5.0 m |
|
Standard Safety Hardware |
6 Standard Airbags, ESP, Hill Hold |
6 Airbags, ESP, Corner Brake Control |
|
Crash Safety Rating |
Untested |
5-Star Rating (Bharat NCAP) |
|
Key Tech Highlights |
Head-Up Display (HUD), 360 Camera, Wireless Charger, 9" Screen |
Voice-Assisted Sunroof, Air Purifier, 10.25" Screen |
|
CNG Safety Mechanisms |
Micro-switch fuel lid cutoff, leak detection |
Micro-switch, Thermal Incident Protection, Auto Gas Cutoff |
Price Positioning
Toyota Glanza E-CNG Facelift: it is offered in S CNG, G CNG and V CNG trims across both manual and AMT options. Toyota is yet to reveal the full price list of the Glanza facelift.
Tata Altroz iCNG: the CNG option is available across a broader variant range, and priced between Rs 7.30 lakh and Rs 10.80 lakh.
Verdict
Buy the Toyota Glanza CNG facelift if you want maximum fuel economy, low-end torque for city driving and premium amenities like a HUD, 360-degree camera, wireless charger with active cooling, ventilated front seats and Level-2 ADAS tech.
Buy the Tata Altroz iCNG if you want usable boot space for family travel and prefer a 5-star Bharat NCAP crash safety rating.
Also See - Hyundai Bayon Vs Maruti Victoris - Dimensions, Boot Space and Specs Compared
About Author
Amit Sharma
Sub-Editor
Amit is responsible for the content creation on the Carlelo website with an objective to serve the online visitors to the best of his abilities. He has a vast experience of over 12 years in motoring journalism and has worked with multiple automotive brands including CarDekho, IndiaCarNews and Zee Network (India.com Auto)
Education: B-Tech in Information Technology (Rajasthan Technical University)
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