The Audi A1 1.6 TDI has been made more efficient, with the new model emitting just 99 g/km CO2, equivalent to 74.3 mpg.
Further optimisation of the fuel system and engine management unit has reduced the CO2 output of the A1 1.6 TDI from 105 g/km to 99 g/km, and boosted its official combined economy figure from 70.6 mpg to 74.3 mpg. The A1 retains the same engine start-stop and energy recuperation systems.
The A1 1.6 TDI, with its turbocharged and directly injected common rail unit and five-speed manual transmission, accelerates from rest to 62 mph in 10.5 seconds, and on to a top speed of 118 mph.
This means that the A1 1.6 TDI is exempt from the London congestion charge, and its price remains unchanged, with the SE, Sport and S line models ranging from £14,480 to £17,865.
It is also exempt from Vehicle Excise Duty (VED) from year 2 onwards as the duty bandings currently stand. The majority of A1 models, including the 1.6 TDI, are already duty-free in the first year of ownership.
The A1 1.6 TDI with 99 g/km CO2 output can be ordered in all three UK A1 trim levels – SE, Sport and S line. All feature alloy wheels, remote central locking, air conditioning, electric front windows and mirrors and a six-speaker single CD audio system with auxiliary iPod connection linked to a 6.5-inch retractable display.
The three-door Audi A3 1.6 TDI also emits 99 g/km and 74.3 mpg.