Kia Optima vs Mazda Mazda3
A detailed look at how two of Australia's most popular Sedans 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.
Track the Kia Optima & Mazda Mazda3
Get price-drop alerts on these models plus our free weekly new-car rundown. Unsubscribe anytime.
Price Breakdown
Pricing for one or both models is yet to be confirmed for the Australian market. We will update this comparison when official RRPs are announced.
Safety Rundown
ANCAP safety ratings have not been published for both models yet. We will update this section when crash test results are available.
Feature Showdown
The Kia Optima features a 8-inch touchscreen, while the Mazda Mazda3 gets a 8.8-inch display and 7-inch instruments.
The Kia Optima stands out with wireless charging, heated front seats, ventilated seats and Harman/Kardon audio that you will not find on the Mazda Mazda3. The Mazda Mazda3 counters with Apple CarPlay. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Kia Optima uses a 2.0L T-GDI turbo producing 180kW and 350Nm of torque, sent through a 6-speed automatic to a FWD layout.
The Mazda Mazda3 responds with a Petrol making 114kW and 200Nm, paired to a automatic driving the front wheels. It gets to 100km/h in 9.7 seconds.
The Kia Optima has the clear power advantage at 180kW vs 114kW. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Kia Optima measures 4,855mm long on a 2,805mm wheelbase, 395mm longer than the Mazda Mazda3 at 4,460mm (2,725mm wheelbase). The longer wheelbase on the Kia Optima generally means more rear legroom.
Boot space is 510L in the Kia Optima and 295L in the Mazda Mazda3, giving the Kia Optima a 215L advantage.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
10.6m to 10.9m
Based on 10.9m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 10.6m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
Compare U-turns side by side
Turning Circle · U-turn compare
kerb-to-kerb, 2 cars0 of 2 clear a 7.0 m street in one sweep
Green cars complete the U-turn; amber need a 3-point turn. Drag the slider to test tighter streets.
Standard widths: AU local streets ~5.5–7 m; main roads ~9–12 m.
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $2,423/year for the Kia Optima and $1,682/year for the Mazda Mazda3. That is a $741 annual difference in favour of the Mazda Mazda3.
Estimated annual total: $2,423 (Kia Optima) vs $1,682 (Mazda Mazda3). The Mazda Mazda3 saves you roughly $741 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 7 years / 999,999km (Kia Optima) vs 5 years / 999,999km (Mazda Mazda3). The Kia Optima has longer coverage.
Who Should Buy Which?
Buy the Kia Optima if: You prioritise performance, need more boot space, value a longer warranty, or prefer Kia's approach to design and ownership experience.
Buy the Mazda Mazda3 if: You want lower running costs, or prefer Mazda's approach to design and ownership experience.
The Verdict
The Kia Optima takes 3 of 4 key spec categories. The Mazda Mazda3 will save you roughly $741 a year in fuel. If boot space matters, the Kia Optima has a clear edge. The Kia Optima 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, Kia Optima and Mazda Mazda3?
The Mazda Mazda3 is the cheapest at $26,490 before on-road costs.
Which is the most fuel-efficient?
The Mazda Mazda3 uses the least fuel at 5.9L/100km on the combined cycle.
Which is safest?
They are evenly matched — Kia Optima all hold a 5-star ANCAP rating. Compare the active-safety features above to separate them.
Which has the most boot space?
The Kia Optima has the largest boot at 510L.
Which can tow the most?
The Mazda Mazda3 has the highest braked towing capacity at 1,200kg.
Which has the best warranty?
The Kia Optima has the longest warranty at 7 years / Unlimited.
Which is the most powerful?
The Kia Optima makes the most power at 180kW.
Track the cars you're comparing
Get price-drop and spec-change alerts on the models in this comparison, plus our weekly new-car rundown of launches, deals and reviews.
- Price-drop alerts on these models
- Spec-change alerts
- Weekly new-car rundown
No spam, unsubscribe anytime. By subscribing you agree to receive marketing emails.
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
Comments (0)
Sign in to join the conversation
No comments yet. Be the first!
