Audi is welcoming the addition of the VW Group's new 1.4-liter turbocharged petrol engine (TFSI) with Cylinder-on-Demand (CoD) technology in the A1 and A3 hatchback ranges in Britain.
The
new 1.4 TSI CoD unit can run on two-cylinders under low and
intermediate loads and when coasting, at engine speeds between 1,400 and
4,000 rpm, and torque between approximately 25 and 75 Nm, to greatly
improve fuel economy.
When
applied to the four-cylinder engine, the CoD system shuts down the
second and third cylinders, which are reactivated as soon as the driver
calls for strong acceleration by pressing hard on the gas pedal.
According to Audi, the switch between two
cylinder and four cylinder operations take place in 13 to 35
milliseconds, depending on engine speed, and are carried out "virtually
imperceptibly" to the driver and passengers. The 1.4-liter unit is also
fitted with a start-stop system.
The 1.4-liter engine itself puts out 138hp (140PS) at 5,000 rpm and 184 lb-ft (250Nm) of torque between 1,500 and 3,500 rpm.
It
allows for 0-62 mph (100km/h) acceleration times of 7.9 and 8.0 seconds
in the A1 and five-door A1 Sportback equipped with S tronic
transmission, and 8.3 and 8.4 seconds in the A3 and A3 Sportback models,
respectively. Top speeds are 132mph (212km/h) in all cases.
At launch, Audi will offer the A1 CoD models only with the seven-speed S tronic twin-clutch automatic transmission, and the A3
CoD range exclusively with the six-speed manual gearbox, however, later
in the year, both transmissions will become available on all CoD
models.
On the combined cycle test, the three door A1
1.4 TFSI CoD Sport, S line and Black Edition and the five door A1
Sportback Sport can return up to 60.1mpg UK (50mpg US or 4.7 lt/100km)
with CO2 emissions of 109g/km, while the S line and Black Edition
versions of the five-door, 57.6mpg UK and 113g/km.
The
three-door A3 CoD models match the A1's number with a combined fuel
economy of 60.1mpg and CO2 output at 109g/km, with the five-door
Sportback marginally behind at 58.9mpg UK (49mpg US or 4.8 lt/100km) and
112g/km.
Available to order from this week in the UK, the A1
CoD starts at £16,740 OTR and the A3 CoD from £20,055 OTR. According to
Audi, the 1.4 TFSI CoD 140PS models carry a premium of £850 over the
respective versions of their continuing 1.4 TFSI 122PS equivalents in
both ranges.