Hyundai Sonata vs Kia K5
2 head-to-heads across the 2026 and 2027 model years, side by side. At default weights the Sonata leads 2–0. Each verdict below is the one its own page prints — price, fuel, safety, space, performance, tech and warranty from EPA, NHTSA and manufacturer data — and the weights are yours to change on any of them.
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Year by year
2 head-to-heads · verdicts at default weightsClear win 6+ points · Edge 2–6 · Toss-up under 2
Across the years, category by category
2 scored head-to-headsThe Sonata leads on price in 2 of 2, fuel & range in 2 of 2; the K5 on tech & comfort in 2 of 2. Category scores are 0–100 from the data on each pair page; a lead here means that model year scored higher in the category, whatever the weights.
| Category | Sonata leads | K5 leads | Level |
|---|---|---|---|
| Price | 2 | 0 | 0 |
| Fuel & range | 2 | 0 | 0 |
| Safety | 1 | 1 | 0 |
| Space & cargo | 0 | 0 | 2 |
| Performance | 1 | 1 | 0 |
| Tech & comfort | 0 | 2 | 0 |
Common questions about the Sonata vs K5
Source: EPA, NHTSA and manufacturer press kitsWhich is better, the Hyundai Sonata or the Kia K5?
In the newest scored pairing, the 2027 Sonata against the 2027 K5: The Hyundai Sonata edges it, 98.1 to 92.7, on fuel & range, performance, price. The Kia K5 is ahead on safety and tech & comfort. Across the 2 head-to-heads scored, the Sonata leads 2–0. Open the 2027 pair to change the weights.
Does the answer change from one model year to the next?
No. In every model year scored (2026 and 2027) the Sonata came out ahead at default weights.
Where is the biggest difference between the Hyundai Sonata and the Kia K5?
The Sonata leads on price in 2 of 2, fuel & range in 2 of 2; the K5 on tech & comfort in 2 of 2. Every count comes from the category scores on the pair pages linked above, which use EPA, NHTSA and manufacturer press-kit data.
How does WhichTrim decide which vehicle wins?
Each of seven categories — price, fuel and range, safety, space and cargo, performance, tech and comfort, warranty — is scored 0–100 from the data on the page. Relative measures give 100 to the better vehicle and a proportional share to the other; NHTSA stars and the Safety Signal use their own scales. The overall score is the weighted mean at the default weights (price 4, safety 4, fuel 3, tech 3, space 2, performance 2, warranty 2). A margin of 6 points or more is a clear win, 2 to 6 an edge, under 2 a toss-up. Every pair page has sliders to change the weights.