Fuel tank: 7 of 7 variants rated.
Opel Karl 1.0 120 Jaar Edition tops the Opel Karl ranking by Fuel tank, at 32 L (8.5 gal US).
Across 7 ranked variants, Fuel tank spans from 32 L (8.5 gal US) to 32 L (8.5 gal US).
| # | Variant | Year | Body | Fuel | Fuel tank |
|---|---|---|---|---|---|
| 1 | Opel Karl 1.0 120 Jaar Edition | 2019 | Hatchback | Petrol | 32 L (8.5 gal US) |
| 2 | Opel Karl Rocks 1.0 Online Edition+1 | 2017 | Hatchback | Petrol | 32 L (8.5 gal US) |
| 3 | Opel Karl 1.0 Edition | 2016 | Hatchback | Petrol | 32 L (8.5 gal US) |
| 4 | Opel Karl 1.0 Innovation+1 | 2016 | Hatchback | Petrol | 32 L (8.5 gal US) |
| 5 | Opel Karl 1.0 Selection | 2015 | Hatchback | Petrol | 32 L (8.5 gal US) |
| 6 | Opel Karl 1.0 Edition | 2015 | Hatchback | Petrol | 32 L (8.5 gal US) |
| 7 | Opel Karl 1.0 Cosmo | 2015 | Hatchback | Petrol | 32 L (8.5 gal US) |