Mazda has upgraded its Mazda3 hatchback and fastback models with a 103bhp 1.5-litre Skyactiv diesel with emissions under 99g/km CO2.

The model is designed to appeal to to both fleet and private buyers. When matched to Mazda's six-speed manual transmission, the diesel has an official fuel efficiency of 74.3mpg.

Available in hatchback and Fastback body styles, the new 1.5 SKYACTIV-D is offered across all trim levels with prices starting at £18,895.

The UK car market now sees 42% of C-segment diesel sales delivering sub 100g/km CO2 emissions, so it was important to push efficiency figures to stay competitive.

Steve Tomlinson, head of fleet for Mazda UK, said: “Putting the 1.5-litre SKYACTIV-D into the Mazda3 will significantly increase the appeal of the Mazda3 to those fleets who prefer their drivers to run vehicles with a sub 2.0-litre engine, and with CO2 emissions from 99g/km this will also make the car more popular with drivers who place low BIK taxation near the top of their consideration criteria.”

The more efficient Mazda3 will be available from December 1.