I still miss my '91 740 but I can't for the life of me remember what plugs went in there.

But I'd trust what IPD says about it though. And they say Bosch.

http://www.ipdusa.com/Volvo-700/Engine/Filters-&-Tune-Up/Spark-Plugs/p-70-189-251-1124/

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)