Fuel tank: 19 of 19 variants rated.
Fiat Seicento 1.1 Young tops the Fiat Seicento ranking by Fuel tank, at 38 L (10.0 gal US).
Across 19 ranked variants, Fuel tank spans from 35 L (9.2 gal US) to 38 L (10.0 gal US).
| # | Variant | Year | Body | Fuel | Fuel tank |
|---|---|---|---|---|---|
| 1 | Fiat Seicento 1.1 Young | 2005 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 2 | Fiat Seicento 1.1 Active | 2004 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 3 | Fiat Seicento 1.1 Active Plus | 2004 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 4 | Fiat Seicento 1.1 Active | 2003 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 5 | Fiat Seicento 1.1 Sound | 2003 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 6 | Fiat Seicento 1.1 Brush | 2002 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 7 | Fiat Seicento 1.1 S | 2001 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 8 | Fiat Seicento 1.1 Team | 2001 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 9 | Fiat Seicento 1.1 SX | 2001 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 10 | Fiat Seicento 1.1 Sporting Abarth | 2001 | Hatchback | Petrol | 38 L (10.0 gal US) |
| 11 | Fiat Seicento 1100 i.e. Young Plus | 2000 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 12 | Fiat Seicento 900 i.e. Young | 1999 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 13 | Fiat Seicento 1100 i.e. Young | 1999 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 14 | Fiat Seicento 1100 i.e. Hobby | 1999 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 15 | Fiat Seicento 900 i.e. S | 1998 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 16 | Fiat Seicento 900 i.e. SX | 1998 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 17 | Fiat Seicento 900 i.e. SX Citymatic | 1998 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 18 | Fiat Seicento 900 i.e. Suite | 1998 | Hatchback | Petrol | 35 L (9.2 gal US) |
| 19 | Fiat Seicento 1100 i.e. Sporting | 1998 | Hatchback | Petrol | 35 L (9.2 gal US) |