compression ratio PORSCHE BOXSTER S 2010 2.G Information Manual

· 28 ·· 29 ·
Boxster S
Direct fuel injection (DFI).
The Boxster S engine has direct
fuel injection (DFI). With milli-
second precision, fuel is injected
directly into the combustion
chamber at up to 120 bar pres -
sure via electromagnetically
actuated injection valves.
The spray and cone angles have
been optimised for torque,
power output, fuel consumption
and emissions by enabling a
homogeneous distribution of the
air/fuel mixture and, therefore,
effective combustion.

Depending on throt tle input, mul
-
tiple fuel injection takes place.
DFI improves the internal cooling
of the combustion chamber by
preparing the mixture directly in
the cylinder. The resulting higher
compression ratio (12.5:1) helps
to deliver more power along with enhanced engine ef ficiency.
Translated into figures, this
means, when compared with the
previous model, a reduction in
fuel consumption of up to 15
%,
depending on the t ype of trans -
mission, and up to 16 % fewer
CO
2 emissions. Injection is regu -
lated by the electronic engine
management system.

The exhaust gas cleaning system
ensures that emissions remain
well below the strict limits of the
Euro 5 European emission stand -
ard, thus helping to protect the
environment.
Boxster | Drive

· 54 ·· 55 ·
Boxster | Chassis
Compression in ‘Normal’ mode –
working piston and bypass, sporty-
comfortable tuning Rebound in ‘Spor t ’ mode –
working piston only, sporty-
comfortable tuning Rebound in ‘Spor t ’ mode –
working piston only, sporty-
hard tuning
Compression in ‘Normal’ mode –

working piston and bypass, sporty-
hard tuning
Porsche Active Suspension
Management (PASM).
The optional PASM is an elec -
tronic damping control system.
On the Boxster models, the
suspension has been tuned to
match the high power of the
engine. PASM actively and con -
tinuously regulates the damping
force for each wheel according
to the road conditions and driving

st yle. In addition, the suspension
is lowered by 10 mm.
The driver can select bet ween
t wo dif ferent modes: ‘Normal’
which is a blend of performance
and comfort, and ‘Sport ’ where
the setup is much firmer. The
PASM control unit evaluates the
driving conditions and modifies
the damping force on each of
the wheels in accordance with
the selected mode.
Sensors monitor the movement
of the vehicle body, for example,
under heav y acceleration and
braking or on uneven roads. The
control unit tunes the dampers

to the optimum hardness for the
selected mode to reduce roll and
pitch still further and to increase
contact bet ween each individual
wheel and the road.
In ‘Sport ’ mode, the suspension
is set to a harder damper rating.
On uneven roads, PASM imme-
diately switches to a softer
rating within the ‘Sport ’ setup
range, thereby improving con-
tact bet ween the wheels and the
road. When the road surface
improves, PASM automatically
reverts to the original, harder
rating.
If ‘Normal’ mode is selected and
the driver’s st yle becomes more
assertive, PASM automatically
switches to a harder rating within
the ‘Normal’ setup range.
Damping becomes harder, and
driving stabilit y and road safet y
are increased.
Mechanically locking rear
differential.
Are you a fan of sport y driving?
In your spare time, do you
enjoy the occasional outing on
the racetrack? Then you
shouldn’t do without the optional
mechanically locking rear differ -
ential available in conjunction
with 18-inch or 19-inch wheels.
It further enhances the traction
of the driven rear wheels on
uneven roads and when acceler -
ating out of tight bends. Road
holding at the limits of perform -
ance is even more impressive.
The car holds its course bet ter
and so PSM intervenes less often.
In other words, sheer driving
pleasure and faster lap times.

· 126 ·· 127 ·
Boxster | Technical data
Technical data
Boxster Boxster S
Weights
Manual / PDK Manual / PDK
Unladen weight (DIN) 1.335 kg / 1.365 kg 1.355 kg / 1.380 kg
Unladen weight (EC)
1)1.410 kg / 1.440 kg 1.430 kg / 1.455 kg
Permissible gross weight 1.635 kg / 1.670 kg 1.645 kg / 1.675 kg
PerformanceManual / PDK (SPORT PLUS)2)Manual / PDK (SPORT PLUS)2)
Top speed km/ h (mph) 263 (163 mph) / 261 (162 mph)274 (170 mph) / 272 (169 mph)
0 –100 km/ h (0 – 62 mph) 5.9 secs / 5.8 secs (5.6 secs)
2)5.3 secs / 5.2 secs (5.0 secs)2)
0 –160 km/ h (0 –99 mph) 13.6 secs / 13.4 secs (13 1 secs)2)11.6 secs / 11.4 secs (11.1 secs)2)
Flexibilit y (80 –120 km/ h)
(50 –75 mph) in 5th gear
In -gear acceleration (80 –120 km/ h)
(5 0 –75 m p h) 7.6 secs / 7.5 secs
– / 3.8 secs
6.5 secs / 6.3 secs
–
/ 3.2 secs
Fuel consumption /emissions3)Manual / PDK Manual / PDK
Urban in l/100 km (mpg) 13.8 (20.8) / 13.6 (20.5)13.6 (20.8) / 14 1 (20.0)
Extra urban in l/100 km (mpg) 6.9 (40.9) / 6.5 (43.5)7.1 (39.8) / 6.6 (42.8)
Combined in l/100 km (mpg) 9.4 (30.1) / 9.1 (31.0)9.5 (29.7) / 9.4 (30.1)
CO
2 emissions (g/km) 221 / 214223 / 221
Dimensions /aerodynamics
Length 4.342 mm4.342 mm
Width (including exterior mirrors) 1.801 mm (1.952 mm)1.801 mm (1.952 mm)
Height 1.292 mm1.294 mm
Wheelbase 2.415 mm2.415 mm
Luggage compartment volume ( VDA)
front/rear150 l / 130 l 150 l / 130 l
Tank capacity (reserve fuel) approx. 64 lapprox. 64 l
Drag coef ficient manual/PDK c
w = 0.29/0.30manual/PDK cw = 0.30/0.31
Boxster Boxster S
Engine
Ty p e Boxer Boxer
Installation mid - mounted mid - mounted
No. of cylinders 6 6
Displacement 2.893 cm
33.436 cm3
Max. power (DIN)
at rpm188 kW (255
hp)
6.400 228 kW (310
hp)
6.400
Max. torque
at rpm 290 Nm
4.400–6.000 360 Nm
4.400–5.500
Compression ratio 11.5 : 1 12.5 : 1
Transmission
Layout Rear-wheel drive Rear-wheel drive
Manual transmission 6-speed 6-speed
PDK (optional) 7-speed 7-speed
Chassis
Front axleMcPherson-strut suspension McPherson-strut suspension
Rear axle McPherson-strut suspension McPherson-strut suspension
Steering Power assisted (hydraulic)
with variable steering ratio Power assisted (hydraulic)

with variable steering ratio
Turning circle 11. 1 m 11. 1 m
Brakes 4 - piston aluminium monobloc fixed
calipers front and rear, discs
internally vented and cross- drilled 4 - piston aluminium monobloc fixed
calipers front and rear, discs

internally vented and cross- drilled
Vehicle stabilit y system PSM (with ABS 8.0) PSM (with ABS 8.0)
Wheels Front: 7 J x 17
Rear: 8.5 J x 17 Front:
8 J x 18
Rear: 9 J x 18
Ty res
Front:
205/55 ZR 17
Rear: 235/50 ZR 17 Front:
235/40 ZR 18
Rear: 265/40 ZR 18
1) Weight is calculated in accordance with the relevant EC Directives and is valid for vehicles with standard specification only.
Optional equipment increases this figure. The figure given includes 68 kg for the driver and 7 kg for luggage.
2) With SPORT PLUS but ton in conjunction with the optional Sport Chrono Package or Sport Chrono Package Plus.3) Data determined in the NEDC (New European Driving Cycle) in accordance with the Euro 5 (715/2007/ EC and 692/2008/ EC) measurement method. The figures do not refer to an individual vehicle nor do they constitute part of the of fer. They are intended solely as a means of com -
paring dif ferent t ypes of vehicle. You can obtain further information about individual vehicles from your Porsche Centre. The fuel consumption
has been calculated based on a vehicle with standard equipment. Optional equipment may af fect fuel consumption and per formance.