CO₂ emissions: 9 of 19 variants rated.
Fiat Seicento 1100 i.e. Young Plus tops the Fiat Seicento ranking by CO₂ emissions, at 148 g/km.
Across 9 ranked variants, CO₂ emissions spans from 146 g/km to 148 g/km.
| # | Variant | Year | Body | Fuel | CO₂ emissions |
|---|---|---|---|---|---|
| 1 | Fiat Seicento 1100 i.e. Young Plus | 2000 | Hatchback | Petrol | 148 g/km |
| 2 | Fiat Seicento 1100 i.e. Young | 1999 | Hatchback | Petrol | 148 g/km |
| 3 | Fiat Seicento 1100 i.e. Hobby | 1999 | Hatchback | Petrol | 148 g/km |
| 4 | Fiat Seicento 1100 i.e. Sporting | 1998 | Hatchback | Petrol | 148 g/km |
| 5 | Fiat Seicento 900 i.e. Young | 1999 | Hatchback | Petrol | 146 g/km |
| 6 | Fiat Seicento 900 i.e. S | 1998 | Hatchback | Petrol | 146 g/km |
| 7 | Fiat Seicento 900 i.e. SX | 1998 | Hatchback | Petrol | 146 g/km |
| 8 | Fiat Seicento 900 i.e. SX Citymatic | 1998 | Hatchback | Petrol | 146 g/km |
| 9 | Fiat Seicento 900 i.e. Suite | 1998 | Hatchback | Petrol | 146 g/km |