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Porsche 928 S (1985) – Specifications & Performance

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+)