2005 PORSCHE BOXSTER Owners Manual

Vehicle Identification, Technical Data
257 Vehicle Identification, Technical Data

258
Vehicle Identification, Technical Data
Vehicle IdentificationWhen ordering spare parts or making inqui-
ries, please always quote the vehicle identifi-
cation number. Vehicle identification label Vehicle identification label is attached to the inner
side of the front luggage compartment hood be-
low the hood lock. It contains all important data
about your car.
This label contains the following information:
1. Vehicle Identification No.
2. Type/Type description
3. Engine code/Transmission code
4. Paint No./Interior
5. Optional equipment
A duplicate of this label is in your Maintenance
Booklet.
Note
This data bank cannot be re-ordered if it is lost or
damaged.
Vehicle identification number In accordance with Federal Safety Regulations,
the vehicle identification number of your car is lo-
cated at the bottom left of the windshield frame
and can be seen from the outside.
The vehicle identification number is in the front lug-
gage compartment under the battery cover and at
the bottom left behind the windshield.
fPlease observe the chapter “BATTERY” on
Page 229.
Safety compliance sticker The safety compliance sticker is your assurance
that your new Porsche complies with all applicable
Federal Motor Vehicle Safety Standards which
were in effect at the time the vehicle was manuf-
actured.
The sticker also shows the month and year of pro-
duction and the vehicle identification number of
your car (perforations) as well as the Gross Vehic-
le Weight Rating and the Gross Axle Weight Ra-
ting.

Vehicle Identification, Technical Data
259
Tire pressure plateThe tire pressure plate is attached to the left-hand
door aperture.Paint dataThe paint data can be found on the tire pressure
plate.
Engine number The engine number is stamped on the underside
of the crankcase.

260
Vehicle Identification, Technical Data
Technical DataEngine data
Boxster Boxster S
Ty p e M 9 6 / 2 5 M 9 6 / 2 6
Horizontally opposed engine, liquid cooledHorizontally opposed engine, liquid cooled
Number of cylinders 6 6
Bore 3.37 in./85.5 mm 3.66 in./93 mm
Stroke 3.07 in./78 mm 3.07 in./78 mm
Cubic capacity 163.96 cu. in./2687 cm
3 193.98 cu. in./3179 cm
3
Compression ratio 11.0 : 1 11.0 : 1
Net-horsepower, SAE J 1349 240 hp/176 kW 280 hp/206 kW
at crankshaft speed 6400 rpm 6200 rpm
Net torque, SAE J 1349 199 ft. lb./270 Nm 236 ft. lb./320 Nm
at crankshaft speed 4700 - 6000 rpm 4700 - 6000rpm
Alternator 2100 W 2100 W
Firing order 1 - 6 - 2 - 4 - 3 - 5 1 - 6 - 2 - 4 - 3 - 5
Engine control Stationary high-voltage distribution, sequential injection,
cylinder-selective knock-control, stereo oxygen sensor closed-loop control, diagnostic system,
4 overhead camshafts, Porsche VarioCam, hydraulic valve clearance compensation

Vehicle Identification, Technical Data
261
Transmission Boxster
Boxster S Gear ratios5-speed
manual transmission6-speed
manual transmissionTiptronic S
1st gear 3.50 : 1 3.67 : 1 3.66 : 1
2nd gear 2.12 : 1 2.05 : 1 2.00 : 1
3rd gear 1.43 : 1 1.41 : 1 1.41 : 1
4th gear 1.09 : 1 1.13 : 1 1.00 : 1
5th gear 0.84 : 1 0.97 : 1 0.74 : 1
6th gear0.82 : 1
Reverse 3.44 : 1 3.33 : 1 4.10 : 1
Final drive ratio 3.75 : 1 3.875 : 1 4.379 : 1
Gear ratios6-speed
manual transmissionTiptronic S
1st gear 3.67 : 1 3.66 : 1
2nd gear 2.05 : 1 2.00 : 1
3rd gear 1.41 : 1 1.41 : 1
4th gear 1.13 : 1 1.00 : 1
5th gear 0.97 : 1 0.74 : 1
6th gear 0.82 : 1
Reverse 3.33 : 1 4.10 : 1
Final drive ratio 3.875 : 1 3.908 : 1

262
Vehicle Identification, Technical Data
Tires, Rims, Tracks Boxster Tires Rim Rim offset Track
Summer tiresfront 205/55 ZR 17 91Y 6.5 J x 17 H2 55 mm 58.7 in./1490 mm
rear * 235/50 ZR 17 91Y 8 J x 17 H2 40 mm 60.4 in./1534 mm
or front 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 18 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46 mm 60.0 in./1522 mm
Snow tiresfront 205/55 R 17 91V M+S 6.5 J x 17 H2 55 mm 58.7 in./1490 mm
rear * 235/50 R 17 96V M+S 8 J x 17 H2 40 mm 60.4 in./1534 mm
or front 235/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “V”) are minimum requirements.

Vehicle Identification, Technical Data
263
fWhen changing tires or fitting new ones: Please observe the chapter “WHEEL BOLTS” on Page 222.
Danger!
Installation of sizes not authorized by
Porsche may have a dangerous effect on
the driving stability and could result in
severe personal injury or death.
fBefore mounting new tires, check with yourPorsche dealer about the current release status. Boxster S Tires Rim Rim offset Track
Summer tiresfront 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y XL 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 19 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46+ mm 60.0 in./1522 mm
Snow tiresfront 255/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “Y”) are minimum requirements.
Tire and rim sizes
Extensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has information
about approved tires and wheels and is happy to assist you. If aftermarket tires and/or wheels are installed which are not
approved by Porsche, the vehicle’s roadability and handling characteristics might be impaired. Since Porsche has no data on
such combinations, Porsche cannot stand behind the safety or durability of these aftermarket combinations.
* Snow chains Can be mounted only on the rear wheels; maximum speed 30 mph/50 km/h. Use only Porsche authorized fine-link
cross-type or edge chains. Snow chain clearance can be guaranteed only with the tire + rim combination marked.

264
Vehicle Identification, Technical Data
Tire pressure for cold tires fThese tire pressures apply only to the tire makes and types approved by Porsche.
Please observe the chapter “WHEEL BOLTS” on Page 222. Summer and snow tires
17 inch wheels front 29 psi (2.0 bar)
rear 36 psi (2.5 bar)
18 inch wheels front 29 psi (2.0 bar)
rear 36 psi (2.5 bar)
19 inch wheels front 32 psi (2.2 bar)
rear 36 psi (2.5 bar)