1985 Porsche 928 S Technical Specifications
By 1985, the V-8 received another update. For the first time, the V-8 received a four-valve-per-cylinder valvetrain, nudging power to 288 hp. The North American market received the updated 48-valve V-8 first and was later available elsewhere in following years.
| Model Year & Variant | 1985 928 S |
| Model Year | 1985 |
| Model Variant | 928 S |
| Type | V8 |
| Induction | Normally-aspirated |
| Cooling | Water-cooled |
| Valvetrain | Double overhead camshafts |
| Injection | Port injection |
| Bore & Stroke | 3.94 in/100.0 mm x 3.12 in/78.9 mm |
| Displacement | 302.38 cu-in/4,957 cc |
| Power | 288 bhp @ 5750 rpm |
| Torque | 302 lb-ft @ 2700 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 | 3,351 lbs. manual/3,417 lbs. automatic |
| Height | 50.51 in/1,283 mm |
| Ground Clearance | N/A |
| Length | 175.67 in/4,462 mm |
| Wheelbase | 98.43 in/2,500 mm |
| Width | 72.28 in/1,836 mm |
| Track Front | 60.98 in/1,549 mm |
| Track Rear | 59.88 in/1,521 mm |
| Drag Coefficient | 0.38 |
| Wheel Size Front | 16 x 7 |
| Wheel Size Rear | 16 x 7 |
| Tire Size Front | 225/50VR-16 |
| Tire Size Rear | 225/50VR-16 |
| Brake Caliper Front | Floating 1-piston |
| Brake Caliper Rear | Floating 1-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 | ~ 6.6 seconds |
| Top Speed | 155 mph manual/150 mph automatic |
| MPG City | 15 manual/15 automatic |
| MPG Highway | 22 manual/21 automatic |
| MPG Combined | 17 manual/17 automatic |
| Fuel Tank Capacity | 22.7 U.S. gallons |
| Required Octane | Premium unleaded (91+) |
