Mazda Mazda3 vs Alfa Romeo Junior
A detailed look at how two of Australia's most popular Hatchbacks compare on price, running costs, safety, and everyday livability.
Specifications and pricing correct at time of publishing. Prices are RRP before on-road costs unless stated otherwise. Always confirm with the manufacturer or dealer before purchasing.
Price Breakdown
The Mazda Mazda3 starts from $26,490 before on-road costs, while the Alfa Romeo Junior opens at $45,900. That makes the Mazda Mazda3 the more affordable entry point by $19,410.
Once you factor in stamp duty, registration, CTP insurance, and dealer delivery, expect to add roughly 8-12% on top of the RRP depending on your state. That puts estimated driveaway prices in the ballpark of $29,139 and $50,490 respectively.
Over 5 years, the running costs favour the Mazda Mazda3 by roughly $1,710 in fuel alone.
Safety Rundown
Both the Mazda Mazda3 and Alfa Romeo Junior hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The Alfa Romeo Junior packs more ADAS features with 7 out of 10 key systems fitted, compared to 6 in the Mazda Mazda3.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control, a reversing camera. Airbag count is 6 in the Mazda Mazda3 and 6 in the Alfa Romeo Junior.
Feature Showdown
The Mazda Mazda3 features a 8.8-inch touchscreen, while the Alfa Romeo Junior gets a 10.3-inch display. Apple CarPlay and Android Auto are standard across both.
The Mazda Mazda3 stands out with Apple CarPlay that you will not find on the Alfa Romeo Junior. The Alfa Romeo Junior counters with wireless Apple CarPlay/Android Auto, wireless charging, power tailgate and ambient lighting. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Mazda Mazda3 uses a Petrol producing 114kW and 200Nm of torque, sent through a automatic to a FWD layout. It covers the 0-100km/h sprint in 9.7 seconds.
The Alfa Romeo Junior responds with a Petrol MHEV making 107kW and 230Nm, paired to a dct driving the front wheels. It gets to 100km/h in 8.9 seconds.
The Mazda Mazda3 has the clear power advantage at 114kW vs 107kW. In the real-world sprint, the Alfa Romeo Junior is 0.8s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Mazda Mazda3 measures 4,460mm long on a 2,726mm wheelbase, 290mm longer than the Alfa Romeo Junior at 4,170mm (2,560mm wheelbase). The longer wheelbase on the Mazda Mazda3 generally means more rear legroom.
Boot space is 295L in the Mazda Mazda3 and 270L in the Alfa Romeo Junior, giving the Mazda Mazda3 a 25L advantage.
For towing, the Alfa Romeo Junior leads with a 1,200kg braked capacity vs 1,000kg. That 200kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
10.6m to 10.8m
Based on 10.6m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 10.8m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $1,083/year for the Mazda Mazda3 and $1,425/year for the Alfa Romeo Junior. That is a $342 annual difference in favour of the Mazda Mazda3.
Estimated annual total: $1,083 (Mazda Mazda3) vs $1,425 (Alfa Romeo Junior). The Mazda Mazda3 saves you roughly $342 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (Mazda Mazda3) vs 5 years / 150,000km (Alfa Romeo Junior). Both match on warranty length.
Who Should Buy Which?
Buy the Mazda Mazda3 if: You want the lower entry price, prioritise performance, need more boot space, want lower running costs, or prefer Mazda's approach to design and ownership experience.
Buy the Alfa Romeo Junior if: You need stronger towing, or prefer Alfa Romeo's approach to design and ownership experience.
The Verdict
The Mazda Mazda3 takes 4 of 6 key spec categories and comes in at a lower price. The Mazda Mazda3 will save you roughly $342 a year in fuel. The best pick depends on what you value most. Explore the full specs for each model below.
Common questions
Which is cheapest, Mazda Mazda3 and Alfa Romeo Junior?
The Mazda Mazda3 is the cheapest at $26,490 before on-road costs. That undercuts the Alfa Romeo Junior by $19,410.
Which is the most fuel-efficient?
The Mazda Mazda3 uses the least fuel at 3.8L/100km on the combined cycle.
Which is safest?
They are evenly matched — Mazda Mazda3 and Alfa Romeo Junior all hold a 5-star ANCAP rating. Compare the active-safety features above to separate them.
Which has the most boot space?
The Mazda Mazda3 has the largest boot at 295L.
Which can tow the most?
The Alfa Romeo Junior has the highest braked towing capacity at 1,200kg.
Which is the most powerful?
The Mazda Mazda3 makes the most power at 114kW. The Alfa Romeo Junior is quickest to 100km/h in 8.9s.
Disclaimer: All information in this comparison was believed to be correct at the time of publishing (20 April 2026). Prices are manufacturer recommended retail prices (RRP) and may vary by state, dealer, and options. Driveaway costs include estimated on-road costs for Victoria. Fuel economy figures are WLTP/ADR combined cycle. Specifications can change without notice. Always verify with the manufacturer before making a purchase decision. CarSorted does not accept payment for recommendations.
Auto-generated from CarSorted's specification data · 20 April 2026
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