Head-to-head
Kia K4 vs Opel Signum
The Kia K4 leads on CO₂ emissions (149 g/km vs 254 g/km). The Opel Signum is ahead on fuel economy (10.6 l/100km vs 6.6 l/100km). The Kia K4 starts at €45,555, the Opel Signum at €42,300.
Comparing K4 Kia K4 1.6 T-GDi MHEV GT-Line Launch Edition vs Signum Opel Signum 2.8-V6 Turbo Temptation. Open the full comparison to change trim →
| Spec | Kia K4 | Opel Signum |
|---|---|---|
| Power | 180 hp | 250 hp |
| Torque | 265 Nm | 330 Nm |
| 0–100 km/h | 8.4 | 7.6 |
| Top speed | 210 km/h | 243 km/h |
| Consumption | 6.6 | 10.6 |
| CO₂ | 149 g/km | 254 g/km |
| Price | 45555 | 42300 |
| Fuel | Petrol | Petrol |
Figures are for the representative variant of each model; the best value in each row is highlighted.