A3 Brochure - Audi

54
TDI®
TDI ®
The injectors open and close in fractions
of a millisecond and inject fuel
several times into the combustion
chamber at pressures of up to 1,800
bar. In some cases, an injection process
can involve the injection of the
tiniest of amounts weighing less
than a thousandth of a gramme.
Almost one in every two Audi cars sold today is a
diesel. What sounds perfectly normal now was
cause for huge excitement a good 20 years ago,
when Audi revolutionised the market with the
first 2.5 litre TDI engine. Developments in
technology such as common rail technology have
since made TDI more and more efficient. The
injectors ensure the fuel is finely and precisely
distributed. Consequently, since the first TDI, the
engines have become more economical, whilst
specific output has increased. That’s why it was
only logical for a diesel to enter the world of
motorsport. And successfully too: in 2006,
Audi was the first car maker to win the Le Mans
24 Hours with a diesel-powered race car, the
Audi R10 TDI – and then went on to repeat this
victory several times over, most recently in 2012.
The diesel engines in the A3 and A3 Sportback
will leave you enthralled not only by their engine
power but by their efficiency as well. Their common
rail injection system has four injectors and is
characterised by an excellent balance of performance,
driving comfort and engine acoustics.
The fuel consumption and CO₂ emission figures can be found from page 118 onwards.
Pre-injection results in a “gentle”
combustion process and consequently
excellent combustion acoustics and
agreeable engine running characteristics.
In other words: Where is the tank?
The 1.6 TDI with 77 kW produces 250 Nm of
torque and lets you accelerate the Audi A3 with
manual transmission from 0 to 100 km/h in
10.7 seconds. Yet it only consumes an impressive
average of 3.8 l of fuel over 100 km and has a
combined emission of only 99 g CO₂/km.
The 2.0 TDI with 110 kW and manual
transmission produces 0 to 100 km/h times of
8.6 seconds for the A3 and 8.7 seconds for the
A3 Sportback. It also has a highly efficient
thermal management system. Its two balancer
shafts are now directly integrated in the
crankcase, improving the running smoothness
even further. It reaches its maximum torque of
320 Nm at 1,750 rpm. The engine with manual
transmission consumes an average of 4.1 l/
100 km in the A3 and 4.2 l/100 km in the
A3 Sportback, and emits only 106 g CO₂/km in
the A3 and 108 g CO₂/km in the A3 Sportback
(combined values).