Consumo de combustible: 9 de 9 variantes con datos.
| # | Variante | Año | Carrocería | Combustible | Consumo de combustible |
|---|---|---|---|---|---|
| 1 | Opel Karl Rocks 1.0 Online Edition | 2017 | Compacto | Gasolina | 5,1 l/100km |
| 2 | Opel Karl 1.0 120 Jaar Edition | 2019 | Compacto | Gasolina | 4,9 l/100km |
| 3 | Opel Karl 1.0 Innovation | 2016 | Compacto | Gasolina | 4,9 l/100km |
| 4 | Opel Karl 1.0 Edition | 2015 | Compacto | Gasolina | 4,9 l/100km |
| 5 | Opel Karl 1.0 Cosmo | 2015 | Compacto | Gasolina | 4,4 l/100km |
| 6 | Opel Karl Rocks 1.0 Online Edition | 2017 | Compacto | Gasolina | 4,3 l/100km |
| 7 | Opel Karl 1.0 Edition | 2016 | Compacto | Gasolina | 4,3 l/100km |
| 8 | Opel Karl 1.0 Innovation | 2016 | Compacto | Gasolina | 4,3 l/100km |
| 9 | Opel Karl 1.0 Selection | 2015 | Compacto | Gasolina | 4,1 l/100km |