Hyundai Sonata vs Kia K4
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.
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Price Breakdown
The Hyundai Sonata starts from $29,990 before on-road costs, while the Kia K4 opens at $32,090. That makes the Hyundai Sonata the more affordable entry point by $2,100.
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 $32,989 and $35,299 respectively.
Over 5 years, the running costs favour the Kia K4 by roughly $3,280 in fuel alone.
Safety Rundown
Both the Hyundai Sonata and Kia K4 hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. We can confirm 5 of 10 key ADAS systems on the Kia K4, against 0 on the Hyundai Sonata.
Both include the essentials: a reversing camera. Airbag count is 6 in the Hyundai Sonata and 6 in the Kia K4.
Feature Showdown
Both come with modern infotainment systems.
The Kia K4 counters with wireless Apple CarPlay/Android Auto that the Hyundai Sonata does not offer. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Hyundai Sonata lines up producing 138kW and 241Nm of torque, sent through a 6-speed automatic to a FWD layout.
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 Hyundai Sonata has the clear power advantage at 138kW vs 110kW. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Hyundai Sonata measures 4,855mm long on a 2,805mm wheelbase, 145mm longer than the Kia K4 at 4,710mm (2,720mm wheelbase). The longer wheelbase on the Hyundai Sonata generally means more rear legroom.
For towing, the Hyundai Sonata leads with a 1,300kg braked capacity vs 1,100kg. That 200kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
10.7m 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 10.7m 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 $2,366/year for the Hyundai Sonata and $1,710/year for the Kia K4. That is a $656 annual difference in favour of the Kia K4.
Estimated annual total: $2,366 (Hyundai Sonata) vs $1,710 (Kia K4). The Kia K4 saves you roughly $656 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years (Hyundai Sonata) vs 7 years / 999,999km (Kia K4). The Kia K4 has longer coverage.
Who Should Buy Which?
Buy the Hyundai Sonata if: You want the lower entry price, prioritise performance, need stronger towing, or prefer Hyundai's approach to design and ownership experience.
Buy the Kia K4 if: You want lower running costs, value a longer warranty, or prefer Kia's approach to design and ownership experience.
The Verdict
The Hyundai Sonata takes 3 of 5 key spec categories and comes in at a lower price. The Kia K4 will save you roughly $656 a year in fuel. 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, Hyundai Sonata and Kia K4?
The Hyundai Sonata is the cheapest at $29,990 before on-road costs. That undercuts the Kia K4 by $2,100.
Which is the most fuel-efficient?
The Kia K4 uses the least fuel at 6L/100km on the combined cycle.
Which is safest?
They are evenly matched — Hyundai Sonata and Kia K4 all hold a 5-star ANCAP rating. Compare the active-safety features above to separate them.
Which can tow the most?
The Hyundai Sonata has the highest braked towing capacity at 1,300kg.
Which has the best warranty?
The Kia K4 has the longest warranty at 7 years / Unlimited.
Which is the most powerful?
The Hyundai Sonata makes the most power at 138kW.
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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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