Technical data

TDI®58
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. Since then, developments such
as common rail technology have made TDI even
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.
So it was only logical that a diesel car should then
enter the world of motorsport. And successfully
too: in 2006, Audi was the first car maker to win
the 24 Hours of Le Mans with a diesel-powered
racing car, the Audi R10 TDI – and then went on to
repeat this victory several times over.
The diesel engines in the A3 and A3 Sportback not
only impress with 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 1.6 TDI with 77 kW
produces 250 Nm of torque and lets you accelerate
from 0 to 100 km/h in 10.7 seconds with manual
transmission in the A3. Yet it only consumes an
impressive combined average of 3.8 l of fuel
over 100 km and has a combined emission of only
99 g CO₂/km.
A special model of the A3 with a 1.6 litre TDI
engine designed specifically to reduce fuel
consumption and emissions is even more efficient
and emits only 85 g CO₂/km. The A3 Sportback
with this engine type has CO₂ emissions of only
88 g CO₂/km.
The 2.0 TDI clean diesel with 135 kW and manual
transmission needs 7.3 seconds for the same
acceleration in the A3 and 7.4 seconds in 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 380 Nm at 1,750 rpm. The
engine consumes an average of 4.1 l/100 km in the
A3 or 4.2 l/100 km in the A3 Sportback, and emits
only 108 g CO₂/km in the A3 or 110 g CO₂/km in
the A3 Sportback (combined values). Impressively,
the 2.0 TDI clean diesel (135 kW) already meets
the stringent EU6 emission standard.
The fuel consumption and CO₂ emission figures as well as the efficiency classes can be found from page 122 onwards.
The injectors open and close in
fractions of a millisecond and
inject fuel several times into the
combustion chamber at pressures
of up to 2,000 bar. In some cases,
an injection process can involve the
injection of the tiniest of amounts
weighing less than a thousandth
of a gramme.
Pre-injection results in a “gentle”
combustion process and consequently
excellent combustion acoustics
and agreeable engine running
characteristics.
TDI®
In other words: Where is the tank?
A3S3_A3S3SB_Technik18_2013_09.indd 58 21.10.13 07:34