Technical data

28
The piezo 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 gram.
TDI®
Pre-injection results in a “gentle”
combustion process and consequent-
ly excellent combustion acoustics
and agreeable engine running char-
acteristics.
One in every two Audi cars sold today is a diesel.
What sounds perfectly normal now was cause for
huge excitement 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. 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 Le Mans 24 Hours with a diesel-powered race
car, the Audi R10 TDI – a victory which it has
repeated several times over, most recently in
2012.
The Audi SQ5 TDI has a bi-turbocharged 3.0 litre
V6 TDI engine with 230 kW, which allows you to
accelerate from 0 to 100 km/in in only 5.1
seconds. This performance is typical Audi – as is
its efficiency. Numerous intelligent measures
such as thermal management, the optimisation
of friction, weight reduction, recuperation and
the start-stop system all help to reduce fuel
consumption. As little as 6.8 litres of diesel are
consumed per 100 km, with 179 g/km CO₂
emissions. These values make the SQ5 TDI Audi's
most efficient S model. The engine reaches its
impressive maximum torque of 650 Nm at an
engine speed of only 1,450 rpm, developing its
power thrillingly evenly.
The fuel consumption and CO₂ emission figures can be found on page 58.
TDI®
In other words: Where is the tank?
SQ5_Fas18_2012_09.indd 28 10.09.12 17:18
3.0 TDI engine (230 kW)
2,000 bar high-pressure injection system
cylinder head with optimised intake manifolds
and two-piece water chamber
optimised intercooler
oil pump and water pump adapted to
increased requirements
two-stage supercharging system with
variable turbine geometry
SQ5_Fas18_2012_09.indd 29 10.09.12 17:18