Cars like Mercedes, BMW, and Peugeot use up to 50% more fuel than they state in official tests — amidst claims that the Volkswagen scandal is just “the tip of the iceberg”.

Many major car manufacturers are selling diesel cars that fail to meet EU air pollution limits, a study has found.

Peugeot-Citroen make the most fuel efficient cars in Europe, as figures confirm Ireland ranks in the top 10 for low fuel emissions.