Mazda Mazda3 vs Kia K4
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 Kia K4 opens at $32,090. That makes the Mazda Mazda3 the more affordable entry point by $5,600.
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 $35,299 respectively.
Over 5 years, the running costs favour the Mazda Mazda3 by roughly $3,135 in fuel alone.
Safety Rundown
The Mazda Mazda3 holds a 5-star ANCAP rating vs 4 stars for the Kia K4. Adult occupant protection scored 98% for the Mazda Mazda3 and 85% for the Kia K4.
Where the two diverge is in active safety technology. The Mazda Mazda3 packs more ADAS features with 6 out of 10 key systems fitted, compared to 5 in the Kia K4.
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 Kia K4.
Feature Showdown
Both come with modern infotainment systems. Apple CarPlay and Android Auto are standard across both.
The Mazda Mazda3 stands out with Apple CarPlay that you will not find on the Kia K4. The Kia K4 counters with wireless Apple CarPlay/Android Auto. 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 Kia K4 responds with a Petrol making 110kW and 180Nm, paired to a automatic driving the front wheels. It gets to 100km/h in 9.8 seconds.
The Mazda Mazda3 has the clear power advantage at 114kW vs 110kW. In the real-world sprint, the Mazda Mazda3 is 0.1s 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, 20mm longer than the Kia K4 at 4,440mm (2,720mm wheelbase). The longer wheelbase on the Mazda Mazda3 generally means more rear legroom.
Boot space is 295L in the Mazda Mazda3 and 428L in the Kia K4, giving the Kia K4 a 133L advantage.
For towing, the Kia K4 leads with a 1,300kg braked capacity vs 1,000kg. That 300kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
10.6m diameter
Good
Based on 10.6m 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 $1,710/year for the Kia K4. That is a $627 annual difference in favour of the Mazda Mazda3.
Estimated annual total: $1,083 (Mazda Mazda3) vs $1,710 (Kia K4). The Mazda Mazda3 saves you roughly $627 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 7 years / 999,999km (Kia K4). The Kia K4 has longer coverage.
Who Should Buy Which?
Buy the Mazda Mazda3 if: You want the lower entry price, prioritise performance, want lower running costs, or prefer Mazda's approach to design and ownership experience.
Buy the Kia K4 if: You need more boot space, value a longer warranty, need stronger towing, or prefer Kia's approach to design and ownership experience.
The Verdict
The Mazda Mazda3 takes 5 of 8 key spec categories and comes in at a lower price. The Mazda Mazda3 will save you roughly $627 a year in fuel. If boot space matters, the Kia K4 has a clear edge. The Kia K4 adds peace of mind with a longer 7-year warranty. 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 Kia K4?
The Mazda Mazda3 is the cheapest at $26,490 before on-road costs. That undercuts the Kia K4 by $5,600.
Which is the most fuel-efficient?
The Mazda Mazda3 uses the least fuel at 3.8L/100km on the combined cycle.
Which is safest?
The Mazda Mazda3 has the highest ANCAP rating at 5 stars.
Which has the most boot space?
The Kia K4 has the largest boot at 428L.
Which can tow the most?
The Kia K4 has the highest braked towing capacity at 1,300kg.
Which has the best warranty?
The Kia K4 has the longest warranty at 7 years / 1000k km.
Which is the most powerful?
The Mazda Mazda3 makes the most power at 114kW. The Mazda Mazda3 is quickest to 100km/h in 9.7s.
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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