Which? executive director Richard Lloyd, said:  “The cost of fuel is one of the biggest concerns for consumers which is why fuel efficiency has become an important selling point for new cars. The new test should be brought in without delay so consumers are no longer misled by fantasy mpg figures.”

Until a more realistic test is introduced, figures for hundreds of cars can be found in our online car reviews.
However, Which?’s findings have been rejected by Mitsubishi Motors UK saying it adhered to measurement regulations stipulated by the New European Drive Cycle (NEDC).

In a statement it said: “The official NEDC figure for the Outlander PHEV is 148 mpg. However, with average UK daily commuting distances the vehicle can achieve considerably more than this. Longer journeys may reduce this figure but the Outlander PHEV will still return impressive economy. Even the 67.3 MPG suggested by WHICH? is good for a large 4×4 SUV like Outlander.”

Lance Bradley, Managing Director, added: “The current test regime for emissions and fuel consumption test is outdated and does the industry no favours but the suggestion that we in some way are misleading car buyers is well wide of the mark and irresponsible.”

Which? top five worst fuel offenders