PORSCHE 928 S4 1991 Technical Specifications

Engine  
Type Double overhead cam, V-8
Bore 3.94 in.
Stroke 3.11 in
Displacement 302.5 cu. in.
Compression ratio 10.0:1
Horsepower (SAE Net) 316 hp (@) 6000 rpm
Maximum torque (ft. lb. 317 ft. lbs (@@ 3000 rpm
Maximum RPM 6600
Engine Design  
Cylinder block Aluminum alloy
Crankshaft Forged steel, 5 main bearings
Cylinder head Aluminum alloy, cross-flow
Valve train Dual overhead camshafts, four valves per cylinder, belt/chain- driven, hydraulic lifters, inclined valves
Cooling system Water-cooled, twin thermostatically controlled, electric radiator fans, automatically controlled front air intake
Lubrication system Crankshaft via toothed belt-driven, crescent gear pump, oil cooler incorporated in radiator
Fuel injection LH-Jetronic with hot wire air flow measurement
Emission system 3-way catalyst with oxygen sensor and secondary air injection
Electrical System  
Battery 12 volt, 72 amp./hr.
Alternator 1610 watt, 115 amp.
Ignition systern EZK-breakerless, fully electronic with dual knock sensor system
Firing order 1-3-7-2-6-5-4-8
Drive Train Front engine, rear drive, rear transaxle
Gear ratios: Manual
1st 3.87:1
2nd 2.25:1
3rd 1.44:1
4th 1.00:1
Reverse 5.59:1
Final Drive 2.54:1
Body  
Corrosion protection Entire body of hot-dipped and electro-gaivanized steel, all panels coated both sides. Total immersion pre-treatment, cataphoretic primer coating, hot wax cavity filler, PVC undercoating
Suspension  
Front Independent unequal length A-arms, double-action shock absorbers and coil springs; 1. I in. hollow stabilizer bar, negative steering roll radius
Rear Independent Weissach suspension system with upper links; lower A-arms; self-stabilizing toe characteristics, .89 in. hollow stabilizer bar
Brakes Power-assisted, dual circuit, four-piston aluminum calipers, Anti-lock Braking System
Front Vented discs, 11.97 in.
Rear Vented discs, 11.77 in.
Wheels Pressure cast light
Front 7.5J x 16 H2
Rear 9J x 16 H2
Tires  
Front 225/50 ZR-16
Rear 245/45 ZR-16
Steering  
Ratio 17.75:1
Turns (lock-to-lock) 3.0
Turning circle 38.4 ft.
Capacities  
Engine 8.0 qts. (w/filter)
Fuel Tank 22.7 gal.
Cooling System 16.9 qts
Dimensions  
Wheelbase 98.4 in.
Track:  
Front 61.06 in.
Rear 60.9 in
Overall Length 178.1 in.
Overall Width 72.3 in.
Height (unladen) 50.5 in.
Ground clearance (laden) 4.7 in.
Curb Weight 3549 lbs.
Performance  
0-60 mph 6.0 secs.
Top speed 165mph
Coefficient of drag .34
Fuel Economy  
City 15 mpg
Highway 19 mpg

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