1998 Buick Regal vs 1999 Buick Riviera
| EPA figure | 1998 Buick Regal | 1999 Buick Riviera |
|---|---|---|
| Model year | 1998 | 1999 |
| Body · drive | Midsize · Front-Wheel Drive · Gas | Midsize · Front-Wheel Drive · Gas |
| Combined MPG | 19 | 19 |
| City / highway MPG | 16 / 25 | 16 / 25 |
| Fuel a year | $3,550 | $4,350 |
| Tailpipe CO₂ (g/mi) | 468 | 468 |
| Engine | 3.8 L 6-cyl turbo supercharged | 3.8 L 6-cyl supercharged |
| Transmission | Automatic 4-spd | Automatic 4-spd |
▲ marks the better official figure on that line: more range, MPG or MPGe; less fuel cost or CO₂. From fueleconomy.gov.