Fuel tank: 6 of 6 variants rated.
Smart roadster 60kW Affection tops the Smart roadster ranking by Fuel tank, at 35 L (9.2 gal US).
Across 6 ranked variants, Fuel tank spans from 35 L (9.2 gal US) to 35 L (9.2 gal US).
| # | Variant | Year | Body | Fuel | Fuel tank |
|---|---|---|---|---|---|
| 1 | Smart roadster 60kW Affection | 2004 | Convertible | Petrol | 35 L (9.2 gal US) |
| 2 | Smart roadster 74kW Brabus | 2004 | Convertible | Petrol | 35 L (9.2 gal US) |
| 3 | Smart roadster-coupé 74kW Brabus | 2004 | Convertible | Petrol | 35 L (9.2 gal US) |
| 4 | Smart roadster 45kW+1 | 2003 | Convertible | Petrol | 35 L (9.2 gal US) |
| 5 | Smart roadster 60kW | 2003 | Convertible | Petrol | 35 L (9.2 gal US) |
| 6 | Smart roadster-coupé 60kW | 2003 | Convertible | Petrol | 35 L (9.2 gal US) |