· 12 ·
The engineering of a 911 starts with its engine.
Two engines with Direct Fuel
Injec tion (DFI) and power output
of 345 h orsepower and 385
horsepower. The optional Porsche
Doppelkupplung (PDK). Porsche
Communicatio n Management
(PCM) with touchscreen and, on
request, a voice-control system.
All progressive technologies.
It would be so easy just to
sum up the meaning of inner
strength. We, howe ver, prefer
to get to the root of it.
All of the 911 Carrera and
911 Targa 4 models have Direct
Fuel Injectio n (DFI). So how does
this compare with standard fuel
injection? The air/f uel mixture
is prepared entirely in the
combustion
chamber after
having been
metered and
injected directly,
with
millisecond precision.
From a technical persp ective,
this means an accura te air/fuel
mixtu re and, therefore, opti mal
combustion. For the driver, it
means a distinct rise in power
and torque, and a distinct fall in
fuel consumption and emissions.
Porsche Doppelkupplung
(PDK), available as an option,
is based on a development
that helped Porsche racing
cars in the 1980s to dominate
racetracks around the world.
PDK, with both a manual gearshift
and an autom atic mode, has
seven gears at its disposal. It is
like having two gea rboxes in one,
and two clutches. Whenever a
particular gear is engaged, the
next gear is alw ays preselected.
Gearshifts,
therefore, take place
within
hundredths of a second,
with out any interruption in the
f low of power. I n comparison with
conventional manual transmission,
PDK achieves a considerably
faster rate of acceleration for the
same rate of fuel consumption.
When compared with the
previous automatic transmission,
i t provides significantly more
driving pleasure, thank s to
improved responsive ness and
greater agility—wi th the same
degree of comfort at a reduced
rate of fuel consumption.
In combination with the Sport
Chrono Package Plus, PDK
has a choice of two additional
functions beyond “Sport”:
“ Launch Control,” for optimal
acceleration from a standing
start, and a “motorsport-
derived
gearshift strategy,”
bringing
gearshift characteristics straight
from the race track.
An additional
display on the steering
wheel
notifies you whe n the
Sport,
“Sport Plus” and Launch
Control
functions ha ve been enab led.
English 
