The Porsche 928 S is a coupé with 2 doors and a front mounted powerplant which delivers its power to the rear wheels.
Its 8 cylinder, double overhead camshaft naturally aspirated engine has 4 valves per cylinder and a capacity of 5 litres. It musters power and torque figures of 284 bhp (288 PS/212 kW) at 5750 rpm and 400 Nm (295 lbft/40.8 kgm) at 2700 rpm respectively.
A 4 speed automatic transmission transmits the power to the driven wheels.
The Porsche 928 S weighs a stated 1550 kg at the kerb.
Its maximum speed quoted is 247 km/h (153 mph).
Full specs
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| bodywork | |||
|---|---|---|---|
| Body type | 2+2 seater fixed-head coupé | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2500 mm | 98.4 inches | |
| Track/tread (front) | 1549 mm | 61 inches | |
| Track/tread (rear) | 1521 mm | 59.9 inches | |
| Length | 4447 mm | 175.1 inches | |
| Width | 1836 mm | 72.3 inches | |
| Height | 1282 mm | 50.5 inches | |
| Ground clearance | 120 mm | 4.7 inches | |
| length:wheelbase ratio | 1.78 | ||
| Kerb weight | 1550 kg | 3417 lb | |
| Weight distribution | |||
| fuel tank capacity | 86 litres | 18.9 [22.7] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | 0.38 | ||
| Frontal area | 1.95 m² | ||
| CdA | 0.74 | ||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Porsche | ||
| Engine code | M 28/45 | ||
| Cylinders | V 8 in 90° vee | ||
| Capacity | 5 litre 4957 cc (302.495 cu in) |
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| Bore × Stroke | 100 × 78.9 mm
3.94 × 3.11 in |
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| Bore/stroke ratio | 1.27 | ||
| Valve gear | double overhead camshaft (DOHC)
4 valves per cylinder 32 valves in total |
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| maximum power output (DIN) |
288 PS (284 bhp) (212 kW) at 5750 rpm |
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| maximum torque (DIN) |
400 Nm (295 ft·lb) (40.8 kgm) at 2700 rpm |
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| Specific output (DIN) |
42.7 kW/litre 58.1 ps/litre 57.3 bhp/litre 0.94 bhp/cu in |
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| Specific torque (DIN) |
80.69 Nm/litre
0.98 ft·lb/cu3 |
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| Engine construction | light alloy block & head | ||
| Lubrication | wet sumped | ||
| compression ratio | 9.3:1 | ||
| Fuel system | Bosch LH-Jetronic fuel injection | ||
| bmep (brake mean effective pressure) | 1014 kPa (147.1 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | 5 | ||
| Engine coolant | Water | ||
| Unitary capacity | 619.63 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | Y | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | 6.7 s | ||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 247 km/h (153 mph) | ||
| Power-to-weight ratio | Higher is better 185.77 PS/tonne (1000 kg) 0.19 PS/kg 136.63 kW/tonne (1000 kg) 0.14 kW/kg 183.23 bhp/tonne (1000 kg) 0.18 bhp/kg 0.08 bhp/lb |
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| Weight-to-power ratio | Lower is better 7.32 kg/kW 12.23 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | |||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | |||
| km/litre | |||
| UK MPG | |||
| US MPG | |||
| Carbon dioxide emissions | |||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | |||
| CO2 Effizienz (DE) | |||
| chassis | |||
| Engine position | front | ||
| Engine layout | longitudinal | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | power assisted rack & pinion | ||
| turns lock-to-lock | 3.100 | ||
| Turning circle | |||
| Front suspension | I.MS.W.CS.ARB. | ||
| Rear suspension | I.WA.W.STA.TB.CS. | ||
| Wheel size front | 7J x 16 | ||
| Wheel size rear | 7J x 16 | ||
| Tyres front | 225/50 VR 16 | ||
| Tyres rear | 225/50 VR 16 | ||
| Brakes F/R | VeDi/VeDi | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 4 speed automatic | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 2.54 | ||
| general | |||
| Carfolio.com ID | 323884 | ||
| Production total | |||
| Model code | |||
| RAC rating | 49.6 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1985 Porsche 928 S Automatic added 2013-03-21. Last modified 2025-03-30. |
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