Mazda3 1.6 diesel• Top economy of 65.7mpg
• Emissions from 115g/km of CO2
• Improved efficiency reduces tax costs

The Mazda3 diesel hatchback is now cleaner and cheaper to own, with economy of up to 65.7mpg.

This is achieved by the 1.6-litre Sport Diesel and 1.6-litre Sport Nav Diesel, costing £19,095 and £19,945 respectively. Both emit 115g/km of CO2, making them cheaper to tax than before. They also fall into the lowest company car BIK bracket of 13 per cent.

Standard equipment is impressive, with a Bose audio system, heated sports seats, 17-inch alloy wheels and a subtle body styling kit.

The £20,095 2.2-litre Sport Diesel with 148bhp and £21,195 Sport Nav Diesel with 182bhp both drop a company car tax band as well. Emitting 139 and 144g/km of CO2 respectively they are in the 20 and 21 per cent BIK car tax bands and now average 54.3 and 52.3mpg.

Exterior tweaks include a more muscular nose, sculpted rear bumper and a new design of alloy wheels. Inside, Mazda says the cabin is quieter than before. There are also new materials and colourways to enhance interior ambience.

Prices start at £14,995 for the entry-level 1.6-litre S petrol and go up to £23,395 for the hot 2.3-litre MPS with 256bhp. Six trim levels are available, ranging between S, TS, TS2, TS2 Nav, Sport and Sport Nav.

By Andy Goodwin, senior web journalist