Citroen’s  good looking and extremely comfortable mid-size sedan the C5 has been updated for the British market as it gets a new diesel variant with a 1.6 HDi engine. This 110 hp unit, which can be had with all the trim levels has an average fuel consumption of 56.5 mpg, so your fuel costs will quite low. Other advantage of this model is the taxation, as it gets free road tax in the first year, because it only emits 130g of CO2 per Km, 10 less than before!