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S4 vs S5

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Old 04-26-06, 07:23 AM
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S4 vs S5
This is not anouther arguement for which is better... But it is a question about if there is a way to tell the difference between an S4 NA and an S5 NA if it has been removed from a car and is just sitting in the floor?
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Old 04-26-06, 07:59 AM
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If they are complete, the S4 has a mechanical oil metering pump, while the S5 is electric. The TPS on a S4 is single, while the S5 is a 2 plunger unit.
It's a start!
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Old 04-26-06, 08:42 AM
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IIRC s5's don't have the EGR thingy on top of the engine.
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Old 04-26-06, 08:54 AM
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s5 knock sensor is on the front s4 is on the side IIRC.
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Old 04-26-06, 08:59 AM
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also the S5 has the VDI manifold
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Old 04-26-06, 09:22 AM
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Intake manifolds will do it. It's the most obvious difference.
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Old 04-26-06, 09:49 AM
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Originally Posted by snowball
s5 knock sensor is on the front s4 is on the side IIRC.
No knock sensors on non turbo FC engines
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