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TDI
The Audi R18 TDI
TDI: start a revolution.
And keep repeating it.
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The fuel consumption and CO₂ emission figures can be found from page 120 onwards.
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. Piezo 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 – and then
went on to repeat this victory several times over,
most recently in 2011.
Powerful TDI engines are available for the Audi
A5 Coupé and A5 Cabriolet, which are equipped
with intelligent common rail technology and the
standard start-stop system. The particularly
economical 2.0 TDI with 130 kW is available both
with a 6-speed manual transmission and with the
convenient multitronic system. The 3.0 TDI with
150 kW is new, and one of the most efficient
6-cylinder engines in the world. The top-of-the-
range engine is the 3.0 TDI quattro with 180 kW
and Stronic. To reach 100 km/h, you need just
5.8 seconds in the A5 Coupé and only half a
second longer in the A5 Cabriolet.
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.
Pre-injection results in a “gentle”
combustion process and
consequently excellent combustion
acoustics and agreeable engine
running characteristics.
3.0 TDI engine (150 kW)
Exhaust-gas turbocharger with optimised
adjustable turbine geometry
2,000 bar high-pressure injection system
Engine with reduced friction
Pressure-regulated oil pump
Innovative thermal management with
separate cooling system for engine block/cylinder head
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