The Audi A5 and A4 have been made available with the company’s double-clutch gearbox, the seven-speed S-Tronic transmission.
The new gearbox, only available with the 2.0-litre TFSI petrol engine, speeds up gearshifts and cuts the cars’ acceleration times.
The Audi A5 reaches 62mph in 6.2sec, 0.3sec faster than the manual car, and emits 1g/km less of CO2.
In the Audi A4 saloon 62mph arrives in 6.5sec, 0.1sec faster than the manual, while fuel consumption and CO2 emissions are the same at 38.2mpg and 172g/km.
Both cars cost £1240 more than their manual equivalents.