Porsche 928 Engine information
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M28.01/02 |
M28.09/10 |
M28.11/12 |
M28.21/22 |
M28.41/42 |
M28.41SP |
M28.47 |
M28.49/50 928GTS |
|
Cylinders |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
8 |
|
Valves |
16 |
16 |
16 |
16 |
32 |
32 |
32 |
32 |
|
Capacity |
4474 |
4474 |
4664 |
4664 |
4957 |
4957 |
4957 |
5397 |
|
Stroke |
78.9 |
78.9 |
78.9 |
78.9 |
78.9 |
78.9 |
78.9 |
85.9 |
|
Bore |
95 |
95 |
97 |
97 |
100 |
100 |
100 |
100 |
|
Compression Ratio |
8.5:1 |
10.0:1 |
10.0:1 |
10.4:1 |
10.0:1 |
10.0:1 |
10.0:1 |
10.4:1 |
|
Max Power |
240 |
240 |
300 |
310 |
320 |
320 |
330 |
350 |
|
at engine speed |
5500 |
5250 |
5900 |
5900 |
6000 |
6000 |
6200 |
5700 |
|
Max Torque |
250 |
271 |
263 |
263 |
317 |
317 |
317 |
369 |
|
at engine speed |
3600 |
4000 |
4500 |
4100 |
3000 |
3000 |
4100 |
4250 |
|
Cut Off Speed |
6300 |
6200 |
6500 |
6400 |
6600 |
6600 |
6800 |
6600 |
|
Idle Speed |
|
|
|
700 |
675 |
675 |
775 |
675 |
|
Dry Weight kg |
245 |
245 |
261 |
261 |
264 |
264 |
264 |
266 |
|
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Design |
8 cylinder, 4 stroke, internal combustion V engine |
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Crankcase |
2 piece, light alloy crankcase without cylinder liners |
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Crankshaft |
Forged with 5 plain bearings |
8 bearings | ||||||
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Rods |
Sinter-forged steel |
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Pistons |
Light alloy - cast, contact surface iron coated |
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Camshaft |
Cast, without bearing shells, running in camshaft housing |
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Camshaft drive |
Toothed belt |
Toothed belt and internal chain |
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Valves |
1 intake, 1 exhaust in line overhead |
2 intake, 2 exhaust suspended in V |
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Timing |
Overhead camshaft and hydraulic tappets |
2 overhead camshafts per bank and hydraulic tappets |
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Valve Play |
Self adjusting |
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Valve Timing |
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Intake opens |
8 |
12 |
9 |
6 |
11 |
3 |
3 |
|
|
Intake closes |
55 |
48 |
52 |
54 |
36 |
42 |
42 |
|
|
Exhaust opens |
38 |
32 |
37 |
43 |
17 |
30 |
30 |
|
|
Exhaust closes |
2 |
6 |
2 |
4 |
2 |
5 |
5 |
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Cooling |
Closed coolant-filled system |
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Fans |
mechanical fan + electric fan and thermal switch |
2 electric fans with thermal switches |
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Lubrication |
Forced oil circulation with crescent pump |
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Oil Filter |
Full flow type |
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Oil pressure @ 4000rpm |
5 bar when oil temp between 80 and 100 degC |
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Oil consumption |
up to 2.4 litres per 1000 miles |
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Exhaust |
Continuous twin pipe with primary, intermediate and final mufflers |
Continuous twin pipe with 3 way catalytic converter, intermediate and final mufflers |
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Emissions |
Secondary air injection |
3 way catalytic converter and secondary air injection |
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Heater |
warm water heater with heat exchanger and fan |
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Fuel Delivery |
1 electric fuel pump |
2 electric fuel pumps |
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