Fiat’s popular 500 line-up is continuing to expand thanks to the introduction of two eco-based models, including a diesel which, according to official figures, can average more than 80mpg.

Powered by a 1.3-litre diesel powertrain, the new 500 costs from £14,165 and is being joined a revised 1.2-litre petrol model which has been reworked to bump up fuel efficiency to 65.7mpg.

Emissions are 89g/km for the diesel and 99g/km for the petrol variant which is priced from £11,865.

Performance figures for the 500 1.2 Eco, which develops 69bhp, are 0-60mph in 12.9 seconds with a top speed of 99mph while the diesel has 95bhp giving it a 0-60 sprint time of 10.7 seconds and a claimed top speed of 112mph.

The new engines are also being offered in the convertible versions of the 500 which are priced from £14,515 for the petrol and £16,815 for the diesel.