2008 PORSCHE CAYENNE towing

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 ·

Power is the product of efficiency.
Lightweight alloy engine construction.
‘Less is more’ – less weight, more
performance – is a key principle of
Porsche design.
The V8 Cayenne engines have
a ‘closed-deck’ aluminium
crankcase and lightweight
aluminium bedplate. The cylinder
block and its associated coolant
channels are therefore a fully
enclosed system. This not only
reduces the weight of the engine,
it also improves its dimensional
stability. Since the engine is
stronger, it also has a longer
service life.
Other major lightweight compon-
ents include cast aluminium
pistons and aluminium cylinder
heads. On the Cayenne Turbo, the
pistons are forged to compensate
for the higher loads.
The Cayenne V6 has a cast-iron
crankcase and one-piece cylinderheads in die-cast aluminium. This
combination produces high power
output while reducing the weight
of the engine.
Drive
Lightweight construction used on the V8 engines
Consistent performance and a longer service life.
Engine cooling system.
Each engine remains within its
optimum temperature range at
all times. Clearances throughout
the engine are extremely small,
thereby reducing wear. The entire
cooling system is designed for
prolonged
heavy-duty use, e.g.,
off-road driving or heavy towing
and carrying applications.
Emissions, noise and fuel
consumption remain low, while
power and torque are improved.
Lubrication.
The V8 engines use dry-sump
lubrication to ensure a consistent
supply of oil in all load conditions.
The oil reservoir is located inside
the engine. As well as saving
space and reducing weight, the oil
is always there where it’s needed.
Oil is circulated around the
V8 engines using a demand-driven
pump and two-stage scavenging
system, providing optimum
delivery in even the toughest
scenarios.
The V6 engine has a wet-sump
lubrication system that is
also designed for challenging
conditions, e.g., performance
road driving or extreme off-road
gradients.
A high-performance engine can
only maintain its optimum capability
over a long service life if all com-
ponents are operating consistently
within a specific temperature
range.
The V8 engines have an optimised
coolant management system offering
effective temperature control
throughout the engine. While 20 %
of coolant flows longitudinally
through the crankcase, 80 % serves
the cylinder heads using the
proven cross-flow principle (from
hot to cold).
On all Cayenne models, the piston
heads are cooled using oil-spray
jets integrated in the main lubrica-
tion system.
· 49 · · 48 ·

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 ·

Drive
Applying power with intelligence.
Porsche Traction Management (PTM).
If one wheel loses traction, PTM
utilises the ABD function to apply
the corresponding brake. As a
result, more drive is automatically
transferred to the opposite wheel.
If both wheels on one axle lose
traction, ASR modifies engine output
to maintain drive.
All PTM functions are fully automatic.
All you have to do is choose high-
range mode for road and track or
low-range mode for greater off-road
traction. These are selected using
a single control on the centre
console. In low-range mode, the
gearing is reduced to enhance
off-road manoeuvrability or to
increase road traction when towing
heavy loads.
be automatically varied to match
changing driving conditions. For
the toughest off-road terrain, the
differential can be locked via the
PTM control on the centre console.
Other major features in PTM include
a two-speed transfer gearbox (with
low-range gearing for off-road use),
an automatic brake differential
(ABD) and anti-slip regulation (ASR).
Combining a range of systems
and functions, Porsche Traction
Management (PTM) actively
distributes engine torque precisely
where it’s needed most.
At the heart of PTM is a permanent
all-wheel drive system with electron-
ically variable centre differential.
The standard torque split of 38 %
to the front and 62 % to the rear canCombined, they enable exceptional
performance and vehicle control in
normal road driving or off-road
terrain.
PTM uses the ABD and ASR
functions to achieve dynamic
handling and increased traction.
All-wheel drive Two-stage transfer gearbox
· 67 · · 66 ·

Chassis
Precision in design.
Precision on the road.
location is more accurate and
agility is enhanced, with minimal
disturbance on uneven surfaces.
The subframe is secured on
rubber mountings that minimise
road noise and thus enhance
the engine acoustics.
Made from lightweight high-
strength steel, the front
suspension subframe is specially
constructed to increase the
rigidity of the car.
The resulting benefits include
greater stability, greater comfort
and even greater active and
passive safety. In the event
of an accident, the subframe
deforms in a predefined manner
to provide additional protection
for the passenger compartment.
Front axle.
A powerful and responsive engine
requires an equally responsive
chassis.
The front axle on all fourCayenne
models features subframe-mounted
double wishbone
suspension with
high-mounted upper arms. By
raising the top
wishbones, wheel
Rear axle.
A balanced chassis is essential
on any car and one of the major
challenges in vehicle design.
On all four Cayenne models, we
solved this problem using multi-
link rear suspension. Ideal for
performance road and track
use, it also copes well with the
extremely high towing and
carrying loads that are possible
with each Cayenne.
The lower suspension links and
track rods have a special sheet
steel construction offering greater
strength. The upper links are
located high in the wheel arches
and can therefore be made from
lightweight forged aluminium.
The suspension struts are angled
to allow longer suspension travel
and create a deeper and wider
cargo area. As well as providing
additional space, the car is easier
to load. A key advantage of the
rear axle design is its ability to
minimise dive and squat under
acceleration and braking. It also
uses active toe-angle control to
improve mid-corner stability and
compensate for sudden load
transfer, e.g., lift-off oversteer.
In short: a chassis you would
expect from Porsche. Specially
developed in Weissach.
Front axle (Cayenne Turbo) Rear axle (Cayenne Turbo)
· 73 · · 72 ·

Off road
Applying power with sensitivity, protecting with strength.
Off-road Technology package.
The rear differential enables
optimum distribution of engine
torque in difficult off-road terrain.
A fully automated part of the
all-wheel system, its primary
function is to optimise traction.
If one of the rear wheels begins
to lose grip, the differential varies
the torque transmitted through
each drive shaft, thereby restoring
traction. Available as a factory-fitted
option on all Cayenne models, the
Off-road Technology package*
incorporates an electronically
variable and lockable rear
differential as part of the standard
all-wheel drive system. Other
features include high-strength
rock-rails with integrated skid
plates, a reinforced engine-bay
guard, enhanced protection for
the fuel tank and rear axle, and
a second towing lug.In low-range mode, the rear
differential can be manually
locked using the main off-road
control on the centre console.
In this state, both rear wheels
receive the same amount of
torque.
For additional off-road protection,
optional wheel-arch extensions
(black finish) and running boards*
with integrated skid plates are
available.
* Not available for the Cayenne GTS.
· 89 · · 88 ·

you’ll appreciate even more the
powerful capability of the Cayenne
range of engines.
For the largest of loads, you can
choose from two towing options:
an electrically retractable towbarsystem or a manually detachable
towbar. With the electric system,
the ball neck can be retracted
beneath the rear apron – all at
the push of a button. Both options
are available for all Cayenne
models, have a maximum braked
trailer load of 3,500 kg* (with a
maximum noseweight of 140 kg)
and come with a 13-pole socket.
All Cayenne models have a towbar
preparation as standard.
This exceptional capability is
enough for virtually every type
of load. Even another Porsche.
Towbar systems.
Whatever your passion, all four
Cayenne models offer a wealth
of possibilities that go beyond
the pleasure of driving. When fully
laden or with a heavy trailer load,
Roof transport systems.
Even when the luggage compartment
is completely full, the Cayenne has
space for more. Using the standard
roof rails, the car can be equipped
with an optional roof transport
system. It is compatible with all the
usual load-carrying attachments
available from Porsche Tequipment,
e.g., ski/snowboard carriers and
roof boxes. All load-bearing parts
are made from robust aluminium
and designed for a maximum loadof 100 kg. The optional roof
rails
can also be combined with
a set of transverse roof bars
from Porsche Tequipment, offering
a maximum load of 75 kg.
Transport
The Cayenne is built to carry many things.
Even another Porsche.
* Cayenne GTS with steel-sprung suspension:
3,080 kg.
· 147 · · 146 ·