2026 Mercedes-Benz S580 4matic vs 2026 Porsche Panamera 4
| EPA figure | 2026 Mercedes-Benz S580 4matic | 2026 Porsche Panamera 4 |
|---|---|---|
| Model year | 2026 | 2026 |
| Body · drive | Large · All-Wheel Drive · Hybrid | Large · All-Wheel Drive · Gas |
| Combined MPG | 20 | 21 |
| City / highway MPG | 17 / 27 | 18 / 25 |
| Fuel a year | $4,100 | $3,900 |
| Tailpipe CO₂ (g/mi) | 438 | 425 |
| Engine | 4.0 L 8-cyl turbo | 2.9 L 6-cyl turbo |
| Transmission | Automatic 9-spd | Automatic (AM-S8) |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.