re. spark plugs 2 prong & plat+4

[Ben Swann]

[I own a 86 Audi 5000 TQ. Bosch made a 2 prong plug that was considered
by some to be a racing plug for the 2.2L 5 cyc engine. I do not know
how well these plugs will hold up in the 2.2L Turbo engine used in this
model. I visited Bosch home page the other day, and noticed that they
make a 2-pronged platinum(double-coated) plug for the older
Audis(assumption) since a querying their database did not give any results.

My question is does anyone have the part number for the older 2-prong
copper core Bosch plug? Does the newer 2-prong platinum plug work better
now? How about the Bosch platinum +4. Is it a reliable and durable plug
for this make and model of Audi? What is the recommended plug these days
for a 86 Audi 5000TQ?  I am sure this has been discussed many times here.
If
there is a thread somewhere, a pointer would be greatly appreciated also.

Thanks a bundle!

gerald]

The 3 prong have been standard fare for me until Bosch came out with the 4
Prong platinum, which is what I use now.  Don't know about the 2 prong.

Performance wise, I don't think multi-prong plugs make much difference when
new.  It is more important how they age.  In this case I find the Bosch 4
Prong are great.  I am sticking ones with 15k of hard use back in after my
5ktq rebuild.  Everything else in the combustion chamber had carbon
buildup, but the plugs look fine.

Ben