Audi TT (2007 year). Manual — part 218

5

Body / dimensions

Length in mm

4178

+ 137

Width in mm

1842

+ 78

Height in mm

1352

+ 6

Wheelbase in mm

2468

+ 46

Front track width in mm

1572

+ 26

Rear track width in mm

1558

+ 30

Number of seats

2 + 2

380_040

6

Body

Audi Space Frame ASF of the Audi TT Coupé ´07

The development targets for the bodyshell of the Audi TT Coupé ‘07

With a weight advantage of 48 % over a comparable all-steel bodyshell, not to mention the optimised weight
distribution, the new composite aluminium-steel spaceframe body of the TT Coupé marks yet another
milestone in the development of modern Audi bodyshells.

Crash safety of the bodyshell is enhanced by load-bearing structures at the front, sides and rear end with
a heavy emphasis on pedestrian safety.

To ensure efficient volume bodyshell production, various new joining and production techniques are
employed.

The repair concept is to a large extent based on the well-known aluminium repair concept, although
combining the materials aluminium and steel meant, of course, that new approaches had to be taken.

Sill section Audi A8
Three-chamber extruded section

380_062

380_063

Sill section Audi TT Coupé ‘07
Four-chamber extruded section

7

Technological concept

Sheet-steel parts are used for the first time in the ASF of the Audi TT Coupé ‘07, in addition to aluminium
castings, aluminium extruded sections and aluminium sheet-metal parts. Collectively they form the body
structure. Vehicle weight distribution is optimised by using sheet-steel parts at the rear end of the body.
This has a direct bearing on sporting characteristics such as driving dynamics and acceleration, as well as
safety characteristics such as stopping distance and driving stability Despite the partial use of sheet-steel
parts, the total body weight of 277 kg including attachments, such as doors and lids, is approx. 48 % less than
that of a comparable full steel body. Although the TT Coupé has grown considerably in size, the overall weight
of the vehicle has been reduced through the use of the aluminium steel bodyshell.

The body structure of the Audi TT Coupé ‘07 has higher strength and 50 % higher torsional rigidity than its
predecessor.

22

Aluminium castings

129

Sheet-aluminium parts

19

Extruded aluminium sections

107

Sheet-steel parts (galvanised)

Reference

For details of design and function,
refer to Self-Study Programme 383
Audi TT Coupé ‘07 - Body.

Component parts overview

380_061

8

Occupant protection

Occupant protection system in the Audi TT Coupé ‘07

The Audi TT Coupé ‘07 is a high-end sports car. However, the occupant protection system matches the
vehicle's driving dynamics in every respect. Creating a sports car with a high occupant protection potential is
always a big challenge. This challenge was met by the TT Coupé development team.

The occupant protection system of the Audi TT Coupé ‘07 is composed of the following components and
systems:

–

Airbag control unit

–

Dual-stage driver and front passenger airbags

–

Front side airbags

–

Central crash sensor for front airbag, so-called "upfront" sensor for head-on collision detection

–

Side impact detection sensors in the front doors

–

Front belt tensioners

–

Battery isolation igniter

–

Belt switch, driver side

–

Belt-on indicator

Due to the different criteria and statutory requirements set by the various markets, the equipment
specifications can vary. This applies particularly to the US market.

Legend

E24

Driver side belt switch

E224 Front passenger side airbag deactivation key

switch

G179 Side airbag crash sensor, driver side
G180 Side airbag crash sensor, front passenger

side

G283 Driver side front airbag crash sensor (central)