2011 PORSCHE 911 CARRERA fuel consumption

3435
A widely held belief about motorsport is
that power is the only thing that mat ters.
From experience, we know bet ter. Extra
horsepower alone has never been enough
to win a single race. Much more important
to us are ideas – ideas that inspire more
intelligent vehicle concepts and more ef fi-
cient drive systems. The same applies on
the road. It ’s about get ting the most out
of what you’ve got. select neutral and release the clutch
pedal. In cars with Porsche Doppel
kupplung
(PDK), the engine switches off whenever
you stop and leave your foot on the
brake pedal.
All audio and communication systems
remain switched on and the climate con -
trol continues to maintain your selected
temperature. The only differences you
will notice are the silence at the rear and
the fuel saving. As soon as you operate
the clutch or release the brake, the
engine will restart swiftly and smoothly.
The auto start/stop function may remain
inactive under particular circumstances,
extreme outside temperatures, when the
SPORT but ton is selected or if bat tery
charge is low. It is also possible to deacti -
vate the function manually using a
separate but ton on the centre console.
Thermal management.
The new thermal management system
regulates the temperature in the engine
and gearbox through the intelligent
manipulation of heat flow.
In this way, the engine and gearbox reach
their optimum operating temperature
sooner. As a result, fuel consumption is
reduced through increased combustion
efficiency and lubrication performance.

Electrical system recuperation.
The new 911 models are also equipped
as standard with fuel-saving electrical
system recuperation technology.
The vehicle bat tery is recharged by the
alternator, predominantly under braking.
Under acceleration, on the other hand,
the power draw of the alternator is limit -
ed to increase the engine output availa -
ble for driving. The electrical systems
are supplied by the electrical energy
stored during the recharging process.
Temperament | Engines
Auto start/stop function.
The auto start/stop function is standard
in the new 911 models.
In cars with the manual gearbox, the
engine switches off automatically when,
for example, you stop at traffic lights,
Not as thirsty as you might think.

Efficiency- enhancing measures.
For fuel consumption and CO2 emissions please refer to page 129.

3637
DFI delivers fuel directly into the combustion
chamber with millisecond precision. The
spray and cone angles of the new multi-
hole injectors have been optimised for
torque, power output, fuel consumption,
emissions and ef ficient combustion.
With direct injection, the engine manage-
ment system regulates injection timing
individually for each cylinder as well as
the injection rate for each cylinder bank.
This optimises the combustion process
and fuel economy. operation to the prevailing conditions.
This results in instant acceleration,
extremely smooth running and an
extraordinary level of tractive power,

but with a comparatively low level of
fuel consumption.
For faster heating of the catalytic converters
after a cold start and optimum torque in
the upper load range, up to three injection
pulses take place per combustion cycle.
DFI improves the internal cooling of

the combustion chamber by having the
mixture prepared directly in the cylinder.
This allows for a higher compression
ratio, which helps to deliver more output
at the same time as enhanced engine
efficiency. Injection is regulated by the
electronic engine management system
and emissions are monitored by the
Lambda sensors.
Temperament | Engines
VarioCam Plus System.
VarioCam Plus is a two-in-one engine
concept for adjusting the intake
camshafts and switching the lift of the
intake valves.
The system first dif ferentiates bet ween
driver inputs that typify normal,
everyday driving and those inputs
that demand maximum performance.
The electronic engine management
system then seamlessly adapts valve
What lies between your home and Le Mans?
Advanced engineering as standard.

Direct fuel injection (DFI).
For fuel consumption and CO2 emissions please refer to page 129.

3839
Temperament
|
Engines
Integrated dry-sump lubrication.
Integrated dr y-sump lubrication ensures
a reliable supply of oil even when a
sport y driving st yle is adopted. It also
has additional cooling functions.
The oil tank is located in the engine,
thereby eliminating the need for an
external oil tank, which saves both space
and weight. To reduce power loss and
increase efficiency, an electronically con -
trolled oil pump supplies the lubricating
points inside the engine as and when
required. This results in optimum supply
of oil, low fuel consumption and, there -
fore, lower exhaust emissions.
Air intake system.
The resonance intake system increases
the intake volume by exploiting the fact
that air oscillates as it passes through
the intake manifold. The system can
adjust to engine speed. Benefits of this
include higher torque at low engine
speeds and a flat ter torque curve.
The
911 Carrera S models operate a t wo -
stage
system.
The entire intake system is made from
light weight plastic. In the new 911 Carrera
model range, the resonator volume of the
air filter housing varies with engine speed
to bring added character to the engine
sound, which becomes much more power -
ful at higher rpm.
Exhaust system.
The exhaust system of the new 911
models has been completely redesigned,
acoustics included.
The stainless-steel exhaust system com -
prises t wo distinctive and independent
exhaust tracts. The cataly tic converters
heat up rapidly for effective emissions
reduction.
A selectable t win -tube sports exhaust
system featuring distinctive polished
stainless-steel tailpipes is available as an
option. Activated by a but ton, it produces
an even more intensive sports car sound.
911 Carrera S with sports exhaust system
Engine management system.
The EMS SDI 9.1 engine management
system ensures optimum engine perfor -
mance at all times.
It controls, for example, the position
of the electronic throt tle valve (ETC) –
a prerequisite for compatibility with the Porsche Stabilit y Management (PSM),
which comes as standard. It also regulates
all engine-related functions to achieve
optimum fuel consumption, emissions and
power output whatever the driving st yle.
Another function is the cylinder-specific
knock control. Since the cylinders never all
work under exactly the same conditions, the knock control function monitors each
one separately. The ignition point is shifted
individually, as and when necessary, to
protect the cylinders and pistons at high
engine speeds.
For compliance with EU standards, the
on - board diagnostics detect any faults
and defects that may occur in the exhaust and fuel systems and then notify the

driver immediately. This also prevents
increased pollutant emissions and
unnecessary fuel consumption.
Twin tailpipe of the sports exhaust system Single-tube tailpipe on the 911 Carrera
Twin-tube tailpipe on the 911 Carrera S
For fuel consumption and CO2 emissions please refer to page 129.

4041
Temperament
|
Transmission
The long and winding road is where you’d like to be.
Sometimes, it pays to take the direct route.

Transmission.
The new 7-speed manual gearbox.
Pure, direct, precise. Short shif t move -
ments and an optimum transition from
one gear to the next. That ’s exactly what
you would expect of a Porsche manual
gearbox.
What you might not have expected is a
7-speed manual gearbox that combines
a high level of sport y performance with
an equally high level of efficiency and
offers extra comfort for longer journeys. It’s an exceptional innovation, and not
only in the sports car segment.
The design of this manual gearbox is
based in principle on that of Porsche
Doppelkupplung (PDK). Gears 1 to 6 have
a sports ratio and top speed is reached
in 6th gear. The additional 7th gear,

however, has a long ratio, which reduces
torque and helps to reduce fuel consump -
tion. Lower engine revs at fast driving
speeds also ensure a high level of com
fort
on long stretches of road. In addition
, a gear indicator in the rev counter reminds
you which gear has been selected. The
upshift indicator in the instrument cluster
helps you actively conserve fuel.
Thanks to the elevated centre console,
the gear lever is within easy reach –

ideal for sport y gear changes.
Whether you select a sporty or comfortable
gear, the way you reach your destination
is in your own hands.
For fuel consumption and CO
2 emissions please refer to page 129.

462135
7R
4243
Porsche Doppelkupplung (PDK).
Available as an option for the new 911
models is 7-speed PDK, featuring manual
and automatic modes. This double - clutch
transmission has been further refined and
enables extremely fast gear changes with
no interruption in the flow of power, which vastly improves acceleration at the
same time as reducing fuel consumption.
In total, PDK has seven gears at its disposal.
Gears 1 to 6 have a sports ratio and top
speed is reached in 6th gear. 7th gear has
a long ratio and helps to reduce fuel

consumption by keeping engine revs low.
Porsche Doppelkupplung (PDK)
PDK is essentially t wo gearboxes in one
and thus requires t wo clutches. This
double-clutch arrangement provides an
alternating, non-positive connection
bet ween the t wo half gearboxes and the
engine by means of t wo separate input
shafts.The flow of power from the engine is
transmit ted through one half gearbox and
one clutch at a time, while the next gear
is preselected in the second half gearbox.
During a gear change, therefore, one
clutch simply opens and the other closes
at the same time, enabling gear changes
to take place within milliseconds.
T emperament | Transmission
The effect is instant. Driving feels even
sportier and more dynamic, and agility
is increased. Depending on the gearshift
programme (SPORT button activated
or deactivated), the gear change is opti -
mised for comfort or for sport y driving.
With the optional Sport Chrono Package,
PDK is enhanced by the ‘Launch Control’
and ‘motorsport- derived gearshif t strategy’
functions (p. 58).
Coasting.
The ‘coasting’ function available with
Porsche Doppelkupplung (PDK) enables
you to save even more fuel where the
situation allows. The engine is decoupled
from the transmission to prevent
deceleration caused by engine braking.
In this way, optimum use is made of the
vehicle’s momentum, allowing it to coast
for longer distances. For example, you may want to slow down
from 100 to 80 km/ h (62 to 49 mph) in
anticipation of the change of speed limit
ahead. As soon as you release the accel-
erator pedal, PDK deselects the current
gear auto
matically and you begin to coast
in neutral until you have reached your
desired speed. The moment you engage
the accelerator or brake pedal, PDK
PDK remains ready to respond as swiftly
and precisely as you would expect.
In short, driving in coasting mode makes
a real impact on fuel consumption without
any need for compromise on comfort or
sporty performance.
selects the appropriate gear smoothly
and seamlessly within a fraction of a sec
-
ond.
Another way to reduce fuel consumption is
to utilise the coasting function on downhill
gradients that are gentle enough for you
to maintain a constant speed. Efficient on
long journeys, such as on the motorway,
For fuel consumption and CO2 emissions please refer to page 129.

4647
Temperament

| Chassis and body
Engineered design.
The new 911 fulfils two structural design
requirements thanks to its completely new
bodyshell: first, excellent driving dynamics
due to the body’s extremely high rigidit y;
second, a vehicle weight saving of up to
60 kg primarily as a result of the intelligent
lightweight construction.
To meet the second requirement,
we employed innovative and precise
techniques for combining various materials
in order to utilise specific material
properties exactly where they are needed.
For the bodyshell, therefore, we used
very thin, but nevertheless extremely
rigid, sheets of steel. Aluminium and magnesium were used extensively in
areas such as the roof, underbody, front
end, doors, rear wings and engine com
-
partment and luggage compartment lids.
Magnesium, which is a particularly light -
weight material, was also selected for
the cockpit and centre console support
beam and, in the Cabriolet models,
the hood shell elements. Such material efficiency is key to reducing the overall
weight and, as a result, fuel consumption
of the vehicle.
For the driver, this intelligent blend

of materials reduces the weight of the
vehicle and offers a high level of comfort
thanks to excellent vibration-damping
characteristics and particularly high com -
posite rigidit y, an increase in dynamic
torsional stiffness of up to 25 % compared
with that of the previous model, and
even
sportier handling despite a further
improvement in the weight to power ratio.
The 100 mm longer wheelbase improves
comfort as well as straight-line accuracy
and driving stabilit y at high speeds and in
fast corners.

Front and rear axles.
The redesigned independent suspension
at the front features a light weight spring-
strut axle with longitudinal and transverse
links and cross members that have been
refined for stiffness. Each front wheel
is precisely located, ensuring excellent directional stability, superior handling
and reduced pitching under braking, and
the wider track optimises turn-in.
The rear axle is equipped with a

motorsport-derived multi-link suspension
and chassis subframe. Refined axle kine -
matics for improved longitudinal damping
reduce acceleration squat and increase comfort. Light weight spring struts further
enhance agility.
The high proportion of aluminium used in
the construction of the axles reduces the
weight of the vehicle and of the unsprung
masses, helping to improve fuel economy,
comfort and agility.
Rear axle of the 911 Carrera S
Front axle of the 911 Carrera S
Aluminium
Deep-drawn steels
Multiphase steels
Super-high-strength micro-alloyed steels
Boron-alloyed steels

7677
Composure
| Comfor t
Engineering that takes you forward:

Porsche Communication Management
(PCM) with navigation module and a
high-resolution 7-inch colour touchscreen
is fit ted as standard. PCM is your control
centre for audio, navigationand communi -
cation functions.Instruments.
Sporty not kitsch, practical not fanciful.
The five circular instruments have one
purpose above all: to provide information.
They do so efficiently and accurately.
Their st yling is t ypically Porsche with the
rev counter exactly where you would
expect it to be: in the middle.
Another element of the Porsche identit y

is
sound. The Sound Package Plus offer
outstanding performance with a total
output of 235 watts. Available as an option
is the BOSE
® Surround Sound System
with a total output of 445 wat ts. In short,
it delivers authentic audio playback com -
bined with an impressive spatial sound.
No system promises such high standards
in the 911, and fulfils them, as the optional High-End Surround Sound System from
Burmester
®, the bespoke manufacturer
based in Berlin and one of the most
respected premium audio manufacturers
worldwide. With a total output of 821 watts,
it ensures an incredible audio experience.
Our patented integral subwoofer enhances
the bass performance of both optional sound systems and also saves weight.
Typically Porsche.
Ergonomics, st yle and sound. Sports car
technology, intelligently combined.
The instrument cluster is new with a high-
resolution 4.6-inch TFT colour screen.

It provides you with a continuous stream
of data from the on-board computer,
such as speed, trip mileage, journey time
or current fuel consumption. It also dis -
plays the navigation system map, delivers
various warnings, including alerts from
the Tyre Pressure Monitoring (TPM) system, and reminds you of your selected
communication and audio settings.
TFT display
Instruments in the 911 Carrera S with aluminium - coloured rev counter

104105
Responsibility
|
Environment
Since 1963, we’ve defined the 911 in terms of sporty performance.
And we’ve scrutinised it daily for its efficiency-enhancing potential.

Porsche and the environment.
We’ve already spoken about our contribu -
tion to motorsport. To be more precise,
about our responsibility for the future of
motorsport. We meet this responsibility
with intelligent technology, unconventional
ideas and optimum performance.
Our approach to environmental protection
is no different. In an era of intensifying
debate about global climate change and
CO
2 emissions, every automotive manu -
facturer is asking what it has to offer
right now. Our answer has long been the
same: excellent performance at the
same time as greater efficiency. Porsche has managed to reduce fuel

consumption across all model ranges
by a double-digit percentage compared
with the respective previous model even
though performance has been increased.
This is made possible by an efficient
drive concept (e.g. DFI and VarioCam
Plus), lightweight construction, optimised
aerodynamics and low rolling resistance.
The environmental management team
at the Porsche Development Centre
in Weissach aims to demonstrate a high
level of environmental responsibility. Here, technological developments are
carried out with environmental protection
in mind. The goal is to enhance perfor
-
mance – but, where possible, not at the
expense of the
environment. We achieve
this goal with
Intelligent Performance, as
epitomised
by the 911.
For fuel consumption and CO
2 emissions please refer to page 129.