Audi A1 and A3 get cylinder-on-demand
The 138bhp four-cylinder petrol engine deactivates two cylinders (when driving under light loads, such as periods of motorway cruising) to improve fuel economy. It is the same engine as in the Volkswagen Golf.
It is available in the A1, A1 Sportback, A3 and A3 Sportback. The A1 models come with a seven-speed S tronic semi-automatic transmission and the A3 models get a six-speed manual.
The A1 gets from 0-62mph in 7.9 seconds, while the A1 Sportback takes 8.0 seconds. The A3 completes the 0-62mph dash in 8.3 seconds, with the Sportback marginally slower at 8.4 seconds. All cars have a top speed of 132mph.
Average economy for the A1 and A1 Sportback in Sport trim is 60.1mpg, with CO2 emissions of 109g/km. S line and Black Editions of the A1 Sportback return average economy of 57.6mpg and CO2 emissions of 113g/km.
The A3 does 60.1mpg and emits 109g/km of CO2, while the Sportback does 58.9mpg with emissions of 112g/km.
Prices for the A1 with the 138bhp 1.4 TFSI start at £18,190 for the three-door S tronic model, while the A1 Sportback costs from £18,810. The A3 costs from £20,055, with the Sportback from £20,675.
The A1 is available in Sport, S line and Black Edition trims, while the A3 comes in SE, Sport and S line trims. Cars are available to order now.
By Matthew Burrow