2008 PORSCHE CAYENNE brakes

Model range
Exceptional performance.
What else would you expect from a Porsche?
The Cayenne.
A high-performance six-speed
manual gearbox is standard
equipment. The optional six-speed
Tiptronic S includes gearshift
controls on the steering wheel.
It is also equipped with standby
control for better fuel economy
(see page 64).
The powerful brakes increase
active safety in all driving scenarios.
The black-finish calipers are unique
to the V6 model.
With its precision steering and
sports chassis setup, the Cayenne
is agile and responsive. Using
Porsche Traction Management (PTM)
and Porsche Stability Management
(PSM), power is transmitted through
the permanent all-wheel drive with
efficiency, precision and safety. In
difficult terrain, the electronically
variable centre differential combines
with the anti-slip regulation (ASR)
and automatic brake differential
(ABD) to maintain optimum traction
at all times. This ability is enhanced
in low-range mode, where all gear
ratios are reduced. As a result,
the car remains mobile in soft
ground and performs better when
towing a heavy trailer load. For
the toughest off-road conditions,
the electronically variable centre
differential can be fully locked while
in low-range mode using the PTM
control on the centre console.
The torque split is then fixed with
38 % of drive being transmitted
to the front wheels and 62 % to
the rear.
For extreme off-road use, there’s
the optional Off-road Technology
package. As well as increasing
underbody protection, it includes
an electronically variable rear
differential (see page 89). This
differential can also be manually
locked to increase off-road
traction.
The Cayenne is an excellent on-
road performer with a wide range
of other talents: off-road capability,
comfort, safety, sporting style and
practicality.
Its powerful V6 engine features
direct fuel injection (DFI), variable
valve timing on inlet and exhaust
and a variable resonance intake
manifold. The results: generous
performance and excellent fuel
economy.
The 3.6-litre engine develops
213 kW (290 hp) at 6,200 rpm.
Maximum torque is 385 Nm
from as low as 3,000 rpm. With
a manual gearbox, it requires
8.1 seconds to reach 100 km / h
(62 mph). Maximum speed is
227 km / h (141 mph).
Press the standard ‘Sport’ button
and the engine management is
adjusted to maximise throttle
response.
· 23 · · 22 ·

The Porsche ‘S’ has long been
a mark of heightened sports
performance. On the Cayenne S –
as on many cars before – it means
power, athleticism, more efficient
dynamics – even greater driving
pleasure.
To experience its effects, simply
drop down a gear on the six-speed
manual gearbox (option: six-speed
Tiptronic S) and open up the
throttle on the 4.8-litre V8 engine.
Thanks to direct fuel injection (DFI),
the effect is immediate with drive
transmitted to a set of 18-inch
Cayenne S II wheels. The car is
propelled to 100 km / h (62 mph) in
as little as 6.6 seconds. Maximum
speed is 252 km / h (157 mph).
The naturally aspirated V8 develops
283 kW (385 hp) at 6,200 rpm.
Maximum torque is 500 Nm
from 3,500 rpm. This exceptional
performance is, in part, achieved
with the aid of variable valve
timing and two-stage valve lift
(VarioCam Plus). This system is
also responsible for the smooth
running characteristics, significantly
improved fuel economy and lower
exhaust emissions.
The engine sound is typically
Porsche – even more so with the
optional sports exhaust system
(available in conjunction with
Tiptronic S). As well as enhancing
the acoustics of the car, it features
twin chrome-plated stainless
steel tailpipes. The sports exhaust
has a ‘Sport’ sound setting that
is automatically enabled when the
general ‘Sport’ mode is selected.
Reaches places that others can only dream of.
Like the heights of driving pleasure.
The Cayenne S.
The handling characteristics and
driving properties are exemplary
for a car of such versatility. Equally
impressive are the standard safety
systems, including larger brakes
with distinctive silver-finish calipers.
Porsche Stability Management (PSM)
is standard on all Cayenne models
and provides a further reduction in
braking distances (see page 98).
The Porsche Ceramic Composite
Brake (PCCB) is available as optional
equipment on the Cayenne S,
Cayenne GTS and Cayenne Turbo.
The driving dynamics can be
further enhanced with the optional
air suspension featuring Porsche
Active Suspension Management
(PASM – see page 76).
Model range
· 27 · · 26 ·

non-slip Alcantara, as are the
rooflining, manual gear-lever boot
and parts of the door panel trim.
The rear seats have a two-seater
look but are in fact designed
f
or up to three adult occupants.
The ‘Sport’ aluminium package
uses aluminium trim on the
dashboard and doors to enhance
the car’s sporting style.
GTS. A thrilling blend of two
legendary designations: the
uncompromising character of Engine power is more than
matched by the red-caliper brakes
with internally vented discs
measuring 350 mm in diameter
at the front. The Porsche Ceramic
Composite Brake (PCCB) is
available as optional equipment.
The performance capability of
the Cayenne GTS is expressed
throughout the exterior design.
The front and rear sections are
identical to those on the Cayenne
Turbo. The colour-coded lower
mouldings (front, side and rear)
enhance the car’s powerful looks.
An elongated roof spoiler with
fixed bi-plane profile is available
as a no-cost option. The side
window surrounds, door handles
and door-sill trim strips have a
stylish black finish. Another feature
unique to the GTS model is the
pair of dual-tube chrome tailpipes
on the sports exhaust system.
The interior shares the same
sporting style – from the stainless
steel door-sill guards with
‘Cayenne GTS’ logo to the high-grip
padded leather steering wheel.
The standard leather interior
incorporates a range of surfaces
on the dashboard, centre console
and door panels. The electrically
adjustable sports seats combine
luxury driving with high lateral
support and include a comfort
memory package. The front and
rear seat centres are finished in
Model range
Extended roof spoiler with fixed bi-plane profile (no-cost option)
the Porsche GT plus the sporting
capability of the Porsche S.
The Cayenne GTS continues
these traditions with power,
practicality and driving pleasure.
The sports seat package with comfort memory includes a three-seater rear bench featuring two-seater styling
· 33 · · 32 ·

Drive
Precision control on road and track.
Comfort and durability on all terrain.
Six-speed manual gearbox.
Drive-off Assistant, which enables
easier hill starts without using the
brakes.
The gear linkage is insulated from
the engine and transmission,
thereby eliminating vibration in
the gear lever.
For additional weight saving, the
gearbox casing is made from
lightweight die-cast aluminium.
throw is short and precise, with
only minimal driver effort required.
Gearbox performance is equally
impressive in low-range mode.
All components are specifically
adapted for the demands of
off-road driving, e.g., deep water
crossings and gradients of up
to 45° in every direction. Special
features include the Porsche The Cayenne, Cayenne S and
Cayenne GTS are all equipped as
standard with a six-speed manual
gearbox. It is specially designed
for the heavy loads encountered
in high-performance, off-road and
towing use.
The sports-oriented setup enables
optimum progression through all
six forward gears. The gear lever
Gear lever
· 63 · · 62 ·

Drive
The convenience of an automatic.
The excitement of a sequential gearbox.
Six-speed Tiptronic S.
Each gearshift point is automatically
selected based on current road
conditions and driving style.
Within a short space of time,
you’ll develop a feel for the
system and begin to influence
gearshifts using the throttle alone.
The benefits of Tiptronic S are most
apparent in high-performance driving.
The immediacy of response, with
practically no interruption in drive,
is comparable with that of a manual
gearbox.
Tiptronic S automatically selects
the optimum gearshift pattern,
even in low-range mode. The
low-range gearing is available at
speeds of up to 15 km / h (9 mph).
You can also return to high-range
mode at up to 30 km / h (19 mph).
For complete manual control,
simply slot into manual and use
the gearshift controls on the
steering wheel. If you prefer, you
can use the gear selector lever
on the centre console. Even in
automatic mode, you can change
gear manually via the rocker
controls on the steering wheel.
If there is no further manual
input for a period of 8 seconds,
the system reverts to automatic
mode.
One of the special features in
Tiptronic S is standby control.
When the car is stationary in an
active gear position and with the
foot brake applied, the input
clutch automatically disconnects
the engine from the driveline,
thereby reducing fuel consumption.
Other useful functions include
a warm-up programme which
temporarily suppresses upshifts
in order to accelerate warm-up
in the catalysts and thus reduce
emissions. If rapid throttle inputs
are detected, the system automat-
ically selects the ‘Sport’ gearshift
pattern, i.e., there is no need to
use a ‘kickdown’ function. When
the throttle is released quickly, e.g.,
on entering a corner, unwanted
downshifts are prevented.
Mid-corner gearshifts are also
suppressed, enhancing stability
and safety.Under heavy braking, Tiptronic S
shifts down to maximise engine
braking. An incline sensor enables
better uphill acceleration and
better engine braking on descent.
Another special feature, Porsche
Hill Holder, permits easy hill starts
without the need to use the brakes.
The gearbox cooling system is
specifically designed to match
the performance, transport,
towing and off-road capabilities
of all Cayenne models.
Tiptronic S is standard equipment
on the Cayenne Turbo and optional
on the other three models. The
six forward ratios transmit power
with smoothness, efficiency and
precision – whatever your choice
of terrain.
In automatic mode, the gearshift
maps range from maximum
economy to maximum performance.
Tiptronic S gearshift control on steering wheel
Tiptronic S gear selector
· 65 · · 64 ·

Oversteer with PSM
Understeer without PSM
Car steers
off line Car steers
off line PSM corrects
line and
stabilises car
PSM corrects
line and
stabilises car
Understeer with PSM Oversteer without PSM
All Cayenne models are
equipped with Porsche Stability
Management (PSM) as standard.
This electronic control system
uses a range of functions –
including anti-lock braking (ABS) –
to help stabilise the vehicle
(and trailer, if fitted) in hazardous
road scenarios. Throughout each
journey, PSM uses a range of
sensors to monitor the direction,
speed, yaw velocity (speed of
rotation around the vertical axis)
and lateral acceleration of the
car. The system then calculates
the actual direction of travel. If
the car begins to oversteer or
understeer, PSM applies selective
braking on individual wheels to
restore stability. If necessary,
PSM can also intervene in the
engine management system to
temporarily modify the amount
of drive to the wheels.PSM has two additional functions
that help reduce braking distances.
If the throttle pedal is released
suddenly, PSM automatically
readies the braking system. The
pressure in the brake lines is
marginally increased, bringing
each of the pads into light contact
with the corresponding disc. If the
driver goes on to apply the brakes,
the calipers respond more quickly.
In an emergency stop – i.e., when
the pressure on the brake pedal
exceeds a certain threshold –
the brake assist function uses
the PSM hydraulics to apply
maximum braking force at all
four wheels.
PSM makes a significant contribu-
tion to car and trailer safety –
within the laws of physics. It
compensates for load transfer
caused by throttle and brake
inputs up to the maximum degree
of lateral acceleration. It also
enhances the car’s driving dynam-
ics and directional stability when
accelerating on variable road
surfaces. PSM can also intervene
through the locking centre and
axle differentials as part of
Porsche Traction Management
(PTM).
Other features include a
special control strategy in
the PSM-integrated ABS for braking on loose surfaces such
as gravel or snow. By briefly
locking the wheels, a wedge is
formed ahead of each tyre which
provides additional purchase
to help slow the car.
For a more active driving experi-
ence, PSM can also be disabled.
For safety reasons, it remains
active in the background, ready
to intervene in critical scenarios.
Expecting the best means preparing for the worst.
Porsche Stability Management (PSM).
Safety
· 99 · · 98 ·

· 185 · · 184 ·
Technical data
* Weight is calculated in accordance with the relevant EC Directives and is valid for standard specification vehicles only.
Some optional equipment may increase this weight. The figure given includes 68 kg for the driver and 7 kg for luggage.
Cayenne Cayenne S
Chassis
Front axle
Extra-large format double Extra-large format double
wishbone suspension, wishbone suspension,
fully independent fully independent
Rear axleMulti-link suspension, Multi-link suspension,
fully independent fully independent
SteeringPower-assisted (hydraulic) Power-assisted (hydraulic)
Brakes6-piston monobloc aluminium 6-piston monobloc aluminium
fixed calipers at front, fixed calipers at front,
4-piston monobloc aluminium 4-piston monobloc aluminium
brakes at rear, brakes at rear,
ABS ABS
Wheels7.5J x 17 8J x 18
Ty r e s235/65 R 17 255/55 R 18
Unladen weightManual/ Tiptronic SManual/ Tiptronic S
DIN2,160 kg/2,170 kg 2,225 kg/2,245 kg
EC*2,235 kg/2,245 kg 2,300 kg/2,320 kg
Permissible gross weight2,945 kg/2,945 kg 3,080 kg/3,080 kg
Maximum payload785 kg/775 kg 855 kg/835 kg
Cayenne GTS Cayenne Turbo
Extra-large format double Extra-large format double
wishbone suspension, wishbone suspension,
fully independent fully independent
Multi-link suspension, Multi-link suspension,
fully independent fully independent
Power-assisted (hydraulic) Power-assisted (hydraulic)
6-piston monobloc aluminium 6-piston monobloc aluminium
fixed calipers at front, fixed calipers at front,
4-piston monobloc aluminium 4-piston monobloc aluminium
brakes at rear, brakes at rear,
ABS ABS
10J x 21 8J x 18
295/35 R 21 275/45 R 19
Manual/ Tiptronic S Tiptronic S
2,225 kg/2,245 kg 2,355 kg
2,300 kg/2,320 kg 2,430 kg
3,080 kg/3,080 kg 3,080 kg
855 kg/835 kg 725 kg

Index
N
Navigation 132
O
Off-road capability 82
Off-road Technology
package 88
On-board computer 132
P
Panoramic roof system 128
ParkAssist 124
Payload 184
Performance 42, 182
Personalisation 148
Porsche Active Suspension
Management (PASM) 76
Porsche Ceramic
Composite Brake (PCCB) 96
Porsche Communication
Management (PCM) 132
Porsche Drive-off
Assistant
62, 85
Porsche Dynamic
Chassis Control (PDCC) 80
Porsche Entry & Drive 126
Porsche Hill Control (PHC)86
T
Technical data 182
Tiptronic S 64
Touchscreen 132
Towbar systems 147, 158
Transfer gearbox 66
Transmission 64, 66
Turbochargers 55
TV tuner 134
Tyre Pressure
Monitoring (TPM) 75
U
Universal audio interface 135
USB port 135
V
Variable valve timing 52
VarioCam Plus 53
Vehicle tracking system 126
Voice control 134
W
Water-repellent side windows12 3
Wheel articulation 81, 86
Wheels 75, 160, 161
Wiper system 124
A
Acoustics 108
Air conditioning 122
Air suspension 78, 189
Airbags 102
Alloy engine 48
All-wheel drive 66
Anti-slip regulation 66
Anti-theft protection 126
Audio systems 130, 136
Automatic brake differential 66
Automatic tailgate 144
Axle concept 72
B
Bluetooth®13 4
Bodyshell 100
BOSE
®
Surround Sound System 136
Brakes 94
C
CD autochanger 131
CD radio 130
Centre differential 66
Ceramic brakes 96
Chassis 68 Child seats 119
Colours 150
Comfort lighting package 127
Cooling system 49
Cruise control 126
D
Direct fuel injection (DFI) 50
DVD autochanger 131
E
Electronic engine management57
Electronic logbook 134
Emissions 106
Engine braking support 86
Engines V6/V8/ Turbo 42 – 45
Exhaust system 60
F
Factory collection 174
G
GPS navigation system 132
GSM telephone 134
H
Hands-free telephony 134 Headlights 92
Heat-insulating glass 123
HomeLink
®
(garage-door opener) 164
I
Ignition system 59
Intake manifold 54
Interior 114, 151
Interior lighting 120
iPod
®13 5
L
Lighting 92
Loading options 142
Lubrication 49
Luggage compartment 140
M
Manual gearbox 62
Materials 110
Mobile phone 134
Mobile phone preparation 130
Monochrome black
exterior package 152
MP3 135
Multifunction
steering wheel 114, 164
· 191 · · 190 ·
Index
Porsche Hill Holder 65, 85
Porsche Stability
Management (PSM) 98
Porsche Traction
Management (PTM) 66
Powerkit Cayenne Turbo 46
Privacy glass 123
R
Recycling 110
Reversing camera 125
Roof transport systems 146
S
Safety 90
Seats 116, 118
Servicing 61, 110
Servotronic 74
Slide/tilt sunroof 127
Sport button 51
SportDesign package 152
Steering 74
Storage compartments 120