2025 Porsche Panamera GTS vs 2027 Mercedes-Benz S580 4matic
| EPA figure | 2025 Porsche Panamera GTS | 2027 Mercedes-Benz S580 4matic |
|---|---|---|
| Model year | 2025 | 2027 |
| Body · drive | Large · All-Wheel Drive · Gas | Large · All-Wheel Drive · Hybrid |
| Combined MPG | 18 | 19 |
| City / highway MPG | 16 / 24 | 16 / 24 |
| Fuel a year | $4,550 | $4,350 |
| Tailpipe CO₂ (g/mi) | 495 | 464 |
| Engine | 4.0 L 8-cyl turbo | 4.0 L 8-cyl turbo |
| Transmission | Automatic (AM-S8) | Automatic 9-spd |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.