Technical data

A4_Fas09_RZ_allroad_S 50 13.03.12 16:07
50 Audi ultra
Audi ultra:
Every gram less extends the lead.
Audi ultra, the pioneering lightweight technology
from Audi, is more than just the sum of its
individual components. It combines innovative
materials, intelligent design principles and
production processes that use resources
sparingly into an overall concept. Many Audi ultra
lightweight measures have already been
implemented in the Audi A4 and S4 models.
That starts with the body. The steel shell design
of the Audi A4 and S4 models combine low
weight with high rigidity.
The design uses only as much material as
necessary in the respectively right places.
Thin metal panels made of hot- and cold-formed
steel in the body structure are combined with
lightweight but sturdy aluminium in the body
plating on the bonnet and wings, for example.
The aluminium components on the front and rear
axle and the lightweight cast aluminium wheels
not only reduce the overall weight but also the
unsprung masses, which in turn leads to a further
increase in driving comfort.
Drive technologies such as direct fuel injection
and turbocharging have always made Audi
engines more powerful. The modern TDI and
TFSI engines in the A4 and S4 models produce
more power with a smaller engine size,
making them significantly lighter than the
corresponding engines used in earlier series.
Each lightweight component has an effect on
other components, allowing their dimensions
to be reduced as well. The result is a continuous
development process towards less and less
weight and more and more efficiency. In figures:
a vehicle that weighs 100 kg less can save up
to 0.3 litres of fuel per 100 km.
Audi ultra on the podium: the Audi R18 TDI
The fuel consumption and CO₂ emission figures can be found from page 110 onwards.
A4_A4_Avant_Fas18_S_2012_03.indd 50 13.04.12 15:14