|
Model Year
1987
Contents
From
the “Porsche 928 S4 Owner’s Manual”, available from 928 Specialists.
928 S4 page
John Pirtle
|
Technical
Data
Engine M 28.41/42
|
Number
of cylinders
|
8
|
|
Bore
|
3.94
in / 100 mm
|
|
Stroke
|
3.11
in / 78.9 mm
|
|
Displacement
|
302.5
cu. in. / 4957 cm3
|
|
Compression
ratio
|
10:1
|
|
SAE
net-horsepower SAE J 1349
|
316
hp / 235 kW at 6000 rpm
|
|
SAE
net-torque SAE J 1349
|
317
ft. lb. / 430 Nm at 3000 rpm
|
|
Max.
permissible rpm
|
6600
|
|
Fuel
octane rating
|
95
RON (90 CLC or AKI (R+M)/2 rating on fuel pumps in U.S.A.) PREMIUM UNLEADED
FUEL ONLY
|
|
Spark
plugs
|
Bosch
WR 7 DC
|
|
Spark
plug gap
|
0.028
– 0.032 in / 0.7 + 0.1 mm
|
|
Battery
capacity
|
12
Volts, 72 Ah
|
|
Alternator
output
|
1610
W / 115 A AC
|
|
Firing
order
|
1
– 3 – 7 – 2 – 6 – 5 – 4 – 8
|
|
Ignition
|
Transistorized
ignition system
|
|
Fan
belts
|
Alternator:
Polyrib K 6-858; air pump 12.5 x 928-F0 toothed belt; air conditioning pump
12.5 x 1125; servo pump 12.5 x 975
|
|
Valve
clearance
|
Hydraulic
valve clearance compensation
|
Engine
Design Specifications
|
Design
|
8
cylinders in V configuration
|
|
Operating
cycle
|
4
stroke
|
|
Cooling
|
water-cooled
with two electric fans
|
|
Lubrication
|
pressure-fed
from sump
|
|
Cylinder
block and head
|
light
metal alloy
|
|
Valve
operation
|
2
overhead camshafts per cylinder bank
|
|
Camshaft
drive
|
toothed
V-belt
|
|
Crankshaft
|
forged
|
|
Fuel
supply
|
electric
pump
|
|
Fuel
injection
|
AFC
(Air Flow Control)
|
Power
Train
|
|
|
Manual transmission
G 28/13
|
Automatic transmission
A 28/12
|
|
|
|
Number
of teeth
|
Gear ratio
|
Gear ratio
|
|
Gear
ratio
|
1st
gear
|
33-44
21-17
|
=4.067:1
|
3.676:1
|
|
|
2nd
gear
|
33-38
21-22
|
=2.714:1
|
2.412:1
|
|
|
3rd
gear
|
33-32
21-26
|
=1.934:1
|
1.436:1
|
|
|
4th
gear
|
33-27
21-29
|
=1/463:1
|
1.000:1
|
|
|
5th
gear
|
1
1
|
=1.000:1
|
|
|
|
Reverse
|
33-50
21-22
|
=3.570:1
|
5.139:1
|
|
Rear
axle ratio
|
33
15
|
=2.200:1
|
2.200:1
|
|
Clutch
|
Single
plate disc
|
|
Power
transmission
|
Double
constant velocity joints and drive shafts
|
Rims,
Tires, Wheel Alignment
|
Summer
tires
|
front 225/50 VR 16 on forged alloy wheel rims 7Jx16H 2
rear 245/45 VR 16 on forged alloy wheel rims 8Jx16H 2
|
|
Snow
tires
|
205/55
R 16 88 Q M+S on alloy wheel rims 7Jx16H 2 or
225/50
R 16 88 Q M+S on alloy wheel rims 7Jx16H 2
The
load rating and identification letter for allowable maximum speed (e.g. 88
Q) represents minimum requirements.
Note instructions in chapter on tires and tire card before
mounting new tires or changing the type of tires.
|
|
Collapsible
spare tire
|
165-15
8 PR 89 P on 5.5Jx15H 2 rim.
Maximum speed 50 mph or 80 km/h.
|
|
Tire
pressure, front and rear with cold tires
|
36
psi or 2.5 bar front, 44 psi or 3.0 bar rear for summer and snow tires; 36 psi
or 2.5 bars for collapsible spare tire
|
|
Snow
chains
|
Mounting
only on drive wheels – possible with all specified snow tire sizes.
Maximum
speed 30 mph or 50 km/h.
|
|
Wheel
camber*
|
Front
–30’ ± 10’;
rear –40’ ± 10’; difference left to right max. 10’
|
|
Toe-in*
|
Front +15’ ± 5’; rear +10’ ± 5’; difference
left to right max. 10’
|
|
Toe
angle difference*
|
At 20° lock to left and right -1° ± 20’
|
|
Caster*
|
3°30’ + 30’ difference left to right max. 20’
|
|
*
At curb weight (unladed with full tank)
|
Weights
|
Curb
weight1
|
3505
lbs / 1590 kg
|
|
Maximum
load capacity
|
640
lbs / 290 kg
|
|
Maximum
permissible weight
|
4189
lbs / 1900 kg
|
|
Maximum
axle load, front*
|
2028
lbs / 920 kg
|
|
Maximum
axle load, rear*
|
2425
lbs / 1100 kg
|
|
Permissible
rack load*
|
165
lbs / 75 kg
|
*
Do not exceed maximum permissible weight
1 Automatic 3549 lbs / 1610
kg
The
vehicle capacity weight (max. load), the Gross Vehicle Weight Rating (GVWR) and
the Gross Axle Weight Ratings (GAWR) for front and rear, are listed on a
sticker located on the doorsill on the driver’s side.
The
gross vehicle weight rating includes the weight of the basic vehicle plus
full fuel tank, oil and coolant, plus max. load which combines passenger (150
pounds/68 kg per designated seating position) and luggage weight. Luggage weight may not be increased
by the use of roof, ski or luggage racks, unless passenger capacity is reduced
accordingly.
Dimensions
(at
permissible max. load)
|
Wheelbase
|
98.43
in / 2500 mm
|
|
Wheel
track front
|
61.00
in / 1549 mm
|
|
Wheel
track, rear with 8Jx16H 2 rims
|
60.90
in / 1546 mm
|
|
Turning
circle (curb to curb)
|
31
ft 5 in / 9.6 m
|
|
Turning
circle (wall to wall)
|
37
ft 8 in / 11.5 mm
|
|
Length
|
178.07
in / 4523 mm
|
|
Width
|
72.28
in / 1836 mm
|
|
Height
(at curb weight)
|
50.47
in / 1282 mm
|
|
Ground
clearance
|
4.72
in / 120 mm
|
Performance*
|
|
Manual transmission
|
Automatic transmission
|
|
Maximum
speed
|
165 mph (265 km/h)
|
162 mph (260 km/h)
|
|
Acceleration
0-60 mph
|
5.7 seconds
|
6.3 seconds
|
|
Time
for ¼ mile
|
14.1 seconds
|
14.7 seconds
|
|
Time
for 1 km
|
25.4 seconds
|
26.2 seconds
|
* At
curb weight and half-load capacity excluding optional equipment and
accessories.
Climbing
Performance
|
Manual transmission
|
|
Automatic transmission
|
|
1st
gear approx.
|
62%
|
|
1st
gear approx.
|
63%
|
|
2nd
gear approx.
|
47%
|
|
2nd
gear approx.
|
39%
|
|
3rd
gear approx.
|
29%
|
|
3rd
gear approx.
|
20%
|
|
4th
gear approx.
|
20%
|
|
4th
gear approx.
|
11%
|
|
5th
gear approx.
|
12%
|
|
|
|
Approximate
values at curb weight and half-load capacity.
Brake
System
Hydraulic dual circuit brake system with front and
rear brake circuits
Front and rear: Disc brakes
Brake power assist
Parking brake acting on rear wheels
Chassis
Suspension
|
Unitized
construction
|
|
|
Suspension
|
Independent
suspension with double control arms, coil spring and shock absorber
assembly for each wheel, front and rear
|
|
Shock
absorbers
|
Double
acting hydraulic shock absorbers, front and rear
|
|
Stabilizers
|
Diameter
28 x 4 mm front, 22.5 x 3.5 mm rear
|
Go to next page ►
|