Fuel tank: 8 of 8 variants rated.
Daihatsu Copen Roadster 1.3 16V DVVT tops the Daihatsu Copen ranking by Fuel tank, at 40 L (10.6 gal US).
Across 8 ranked variants, Fuel tank spans from 40 L (10.6 gal US) to 40 L (10.6 gal US).
| # | Variant | Year | Body | Fuel | Fuel tank |
|---|---|---|---|---|---|
| 1 | Daihatsu Copen Roadster 1.3 16V DVVT | 2006 | Convertible | Petrol | 40 L (10.6 gal US) |
| 2 | Daihatsu Copen Roadster 1.3 16V DVVT Sport | 2006 | Convertible | Petrol | 40 L (10.6 gal US) |
| 3 | Daihatsu Copen Roadster 1.3 16V DVVT Classic | 2006 | Convertible | Petrol | 40 L (10.6 gal US) |
| 4 | Daihatsu Copen Roadster 1.3 16V DVVT GT | 2006 | Convertible | Petrol | 40 L (10.6 gal US) |
| 5 | Daihatsu Copen Type S | 2004 | Convertible | Petrol | 40 L (10.6 gal US) |
| 6 | Daihatsu Copen Type 1 | 2004 | Convertible | Petrol | 40 L (10.6 gal US) |
| 7 | Daihatsu Copen Type 2 | 2004 | Convertible | Petrol | 40 L (10.6 gal US) |
| 8 | Daihatsu Copen Type 3 | 2004 | Convertible | Petrol | 40 L (10.6 gal US) |