Diesel cars ranked by official combined fuel consumption (lower is better), from the EU type-approval record. 13 verified models — the most economical version of each. Plug-in hybrids are excluded so every figure is a like-for-like combustion number. Every figure is cited.
| # | Model | Combined | mpg (UK) |
|---|---|---|---|
| 1 | Peugeot 308308 (II) | 3.1 L/100 km | 91 |
| 2 | Renault MeganeMegane (IV) | 3.7 L/100 km | 76 |
| 3 | Mazda 66 (GJ) | 3.9 L/100 km | 72 |
| 4 | Ford FocusFocus (IV) | 4.1 L/100 km | 69 |
| 5 | Volvo V60V60 (I) | 4.1 L/100 km | 69 |
| 6 | Toyota VersoVerso (R20) | 4.5 L/100 km | 63 |
| 7 | Hyundai TucsonTucson III (TLe) | 4.6 L/100 km | 61 |
| 8 | Mazda CX-5CX-5 (KE) | 4.6 L/100 km | 61 |
| 9 | Nissan X-TrailX-Trail (T32) | 5.1 L/100 km | 55 |
| 10 | Subaru XVXV (GP) | 5.6 L/100 km | 50 |
| 11 | Mercedes-Benz B-ClassB-Class (W247, 3rd gen) | 5.8 L/100 km | 49 |
| 12 | Mitsubishi OutlanderOutlander (CW) | 6.7 L/100 km | 42 |
| 13 | Mitsubishi PajeroPajero III (V60) | 9.5 L/100 km | 30 |
Ranked by the manufacturer’s official combined fuel consumption(lowest L/100 km of each model’s range), from the EU type-approval record. Plug-in hybrids are excluded— their lab figures assume grid charging and aren’t comparable to a combustion car; self-charging hybrids are kept. Figures are the EU combined cycle (WLTP where available); real-world economy varies with driving. UK mpg is converted from L/100 km. The sample is our verified catalogue, not every car on sale.