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Audi A4 DTM & Audi R8
Audi A4 driver Ekblom captures title in Sweden
Ingolstadt, March 18, 2004

AUDI AG returns at factory level to Europe’s most popular touring car race
series more than ten years after the Audi V8 quattro racers triumphant
winning streak in the German Touring Car Championship (DTM). Six newly
developed Audi A4 DTM cars start in the 2004 DTM (German Touring Car
Masters) season. The Audi factory teams Audi Sport Team Abt Sportsline
and Audi Sport Infineon Team Joest assume responsibility for the races.
The six man driver squad, consisting of works drivers Christian Abt, Frank
Biela, Mattias Ekström, Tom Kristensen, Emanuele Pirro and Martin
Tomczyk, is a high-calibre mix of former Audi sports car and touring car

Audi A4 a perfect base
Audi banks on the current A4, Audi’s best selling model in Germany, for
the works comeback in the DTM. “The A4 fits perfectly to the new DTM
technical regulations,” explains Audi Motorsport chief Dr Wolfgang Ullrich.
“On top of this, the Audi A4 already has a long tradition in touring car sport.”
From 1995 to 1999 the Audi A4 quattro was the world’s most successful
Super Touring Car. The Audi A4 STCC won the Swedish Touring Car
Championship (STCC) in 2003.

Extreme driving position
The A4 DTM version is powered by a strong four-litre V8 engine with
approximately 460 hp. A modern and enormously stiff space frame hides
beneath the predominantly carbon fibre skin. The driver sits in a carbon
fibre safety cell, comparable with the monocoque of a single seater. To
ensure the optimum weight distribution, the driver sits almost where the
rear seats are found in a production A4. The V8 engine could therefore be
installed as far behind the front axle as possible.

Know-how borrowed from Audi R8
The Audi Sport engineers were not only able to resource their wealth of
information from the touring car days. Much know-how from the successful
Audi R8 poured into the new Audi touring car racer. “We learnt a great deal
from the sport prototypes,” explains Wolfgang Appel, Head of Vehicle
Technology at Audi Sport. “Although no long distance races feature in the
DTM, as far as the ease of maintenance, handling the car during pit stops,
assembly concepts and production engineering were concerned we were
able to transfer a great deal from the R8 to the A4 DTM.”

Audi teams gain form ease of maintenance
The engineers and mechanics of both Audi works teams will benefit the
most from the ease of maintenance. “For a touring car, the A4 DTM can be
dismantled and reassembled extremely quickly, as a result we save a lot
of time over the course of a race weekend,” says Ralf Jüttner, Audi Sport
Infineon Team Joest Technical Director.

Reliability enormously important
Many details also flowed into the V8 power unit as a result of the
involvement in endurance racing. Although only genuine sprint races with
a maximum distance of 160 kilometres make up the DTM, the number of
engines per team and season is limited to three. Therefore, reliability also
plays a major role in the DTM. Routine for Ulrich Baretzky, Head of Engine
Technology at Audi Sport: “Reliability has always had top priority at Audi. In
five years with the Audi R8 we never had a single engine failure during a

V8 engine with approximately 460 hp
The engine previously utilised in last year´s Abt-Audi TT-R is used as
basis for the A4 DTM. Numerous details of the four-litre power unit were
optimised, which now produces around 460 hp. “The DTM regulations
leave the engineers little room for manoeuvre, so detail work is even more
important,” says Baretzky. The engine ancillaries including the induction
and exhaust systems number among these details. When compared with
last year, the greatest changes are found in this area. Visible at first
glance: The exhaust pipes protrude form the side of the car in front of the
rear wheels.

Le Mans influence on the aerodynamics
Because of the restrictive nature of the DTM regulations, drafted for
performance parity and cost consciousness, detail work in the
aerodynamic field also plays an important role. The Audi engineers again
profited from findings made in the sport prototype field. Specifically at the
24 Hour race at Le Mans with its high average speed, the aerodynamic is
of great importance. Therefore, not only did numerous details flow into the
A4, which originate from the R8, but also a component of the basic
concept: The so called “boat shape”, which distributes the air flow under
the car in the area of the front wheels, is, for a touring car, extremely slim
on the A4 DTM and guarantees a particularly high level of downforce.

Audi drivers impressed by A4 DTM
“Everything on the A4 DTM is a little better than on the TT-R,” raves Audi
works driver Mattias Ekström, who was best Audi driver in last year’s DTM.
“Every detail is worked and executed absolutely professionally. The Audi
Sport team has left nothing to chance during the development.”

Abt and Joest: two strong partners

The homework completed by Audi Sport must be implemented at the
circuit by two strong partners: The factory teams of Audi Sport Team Abt
Sportsline and Audi Sport Infineon Team Joest who have prepared
themselves meticulously for the 2004 season.

Hans-Jürgen Abt’s team, which sensationally won the 2002 DTM against
the might of the works teams, enters four A4 DTM cars divided in two
teams. Approximately 50 employees are in action for Abt Sportsline at the
DTM events. Christian Abt (Germany) and Tom Kristensen (Denmark)
drive two Hasseröder-yellow A4 DTM cars, Mattias Ekström (Sweden) and
Martin Tomczyk (Germany) handle two A4 DTM cars in the blue design of
partners Red Bull and Sony Playstation2.

Reinhold Joest’s team, an AUDI AG partner since 1998 and which played
a decisive role in the successful R8 project, assume responsibility for the
entry of the Audi A4 DTM cars for the two seasoned campaigners Frank
Biela (Germany) and Emanuele Pirro (Italy). The Audi Sport Infineon Team
Joest cars are silver, bearing the sporting kit “S line” logos of quattro
GmbH and the signs of long time Audi partner Infineon. Approximately 35
people are in action for Joest in the DTM.

DTM enormously popular - 1.52 million TV viewers per race
The ten rounds of the 2004 DTM will be held in Germany, Portugal, Italy,
Czech Republic and in the Netherlands. All races will be broadcast
alternatively by ARD and ZDF live. On average last year 1.52 million
viewers followed the live ARD and ZDF broadcasts. The reception at the
circuit also underlines the enormous popularity of the DTM: An average of
almost 65,000 fans were at each event. The DTM has been established
internationally for a long time: TV stations in 175 countries carried reports
about the premier class of touring car racing last year. In addition to ARD
und ZDF, ten more international TV stations will broadcast DTM races live
this season.
Tom Kristensen testing the Audi A4 DTM
Wolfgang Appel (Director of Vehicle Engineering at Audi Sport), Frank Biela and Head of Audi Sport Dr Wolfgang Ullrich (from left to right)
Ralf Jüttner, Emanuele Pirro and Head of Audi Motorsport Dr Wolfgang Ullrich (from left to right)
Sideview of the Audi A4 DTM without doors
View into the cockpit of the Audi A4 DTM
Front wheel arches of the Audi A4 DTM
The fuel rigs of the Audi A4 DTM
View into the cockpit of the Audi A4 DTM
Side view into the cockpit of the Audi A4 DTM