1989 Porsche 928 S Technical Specifications
| Model Year & Variant | 1989 928 S4 |
| Model Year | 1989 |
| Model Variant | 928 S4 |
| Type | V8 |
| Induction | Normally-aspirated |
| Cooling | Water-cooled |
| Valvetrain | Double overhead camshafts |
| Injection | Port injection |
| Bore & Stroke | 3.94 in/100.0 mm x 3.11 in/78.9 mm |
| Displacement | 302.38 cu-in/4,957 cc |
| Power | 320 bhp @ 6000 rpm |
| Torque | 317 lb-ft @ 3000 rpm |
| Max RPM | 6000 rpm |
| Compression Ratio | 10.0:1 |
| Transmission | 4-speed auto, 5-speed manual |
| Layout | Front-engined, rear-wheel drive |
| Curb Weight | 3,505 lbs. manual/3,549 lbs. automatic |
| Height | 50.51 in/1,283 mm |
| Ground Clearance | N/A |
| Length | 178.07 in/4,523 mm |
| Wheelbase | 98.43 in/2,500 mm |
| Width | 72.28 in/1,836 mm |
| Track Front | 61.06 in/1,551 mm |
| Track Rear | 60.87 in/1,546 mm |
| Drag Coefficient | 0.34 |
| Wheel Size Front | 16 x 7 |
| Wheel Size Rear | 16 x 8 |
| Tire Size Front | 225/50VR-16 |
| Tire Size Rear | 245/45VR-16 |
| Brake Caliper Front | Fixed 4-piston |
| Brake Caliper Rear | Fixed 4-piston |
| Brake Disc Type Front | Ventilated discs |
| Brake Disc Type Rear | Ventilated discs |
| Brake | 11.97 in/304 mm x 1.26 in/32 mm |
| Brake Disc Size Rear | 11.77 in/299 mm x 1.10 in/28 mm |
| 0 to 60 mph time | 5.6 seconds |
| Top Speed | 168 mph manual/165 mph automatic |
| MPG City | 13 manual/14 automatic |
| MPG Highway | 20 manual/17 automatic |
| MPG Combined | 15 manual/15 automatic |
| Fuel Tank Capacity | 22.7 U.S. gallons |
| Required Octane | Premium unleaded (91+) |
