What is it? This new Rio diesel is the cleanest and most fuel-efficient non-electric car on sale.
Its average economy of 88.3mpg and CO2 emissions of 85g/km show what’s possible with the latest small diesel engines. Rival models from Ford, Vauxhall and Volkswagen don’t get close to its figures.
The key to the Rio’s efficiency is a new 1.1-litre three-cylinder turbodiesel, along with a host of…
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