PORSCHE 928 S4 1991 Technical Specifications

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
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
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
Front 225/50 ZR-16
Rear 245/45 ZR-16
Ratio 17.75:1
Turns (lock-to-lock) 3.0
Turning circle 38.4 ft.
Engine 8.0 qts. (w/filter)
Fuel Tank 22.7 gal.
Cooling System 16.9 qts
Wheelbase 98.4 in.
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.
0-60 mph 6.0 secs.
Top speed 165mph
Coefficient of drag .34
Fuel Economy  
City 15 mpg
Highway 19 mpg