[Landseer]

85 and 86 were transition years as the 928 was being merged to a single world platform in 1987.
There are two main versions for 1985 as well as 1986, both of which are 928S.
Both have dual distributors because they use nearly same engine control system.
With the hoods open, you can type the difference just from the look of the intakes from 100 yards.

The 32V car has a pair of side plenums and cross pipes. Distributors are located on the right and left cam covers.

The 16V car is what we call the later (electronic fuel injection) Euro S, which for 84, 85 and 86 was a 16V car, having the traditional spider pipe intake, and a twin distributor located on the drivers side, front of engine. It is a single block with a pair of 944 4 cylinder distributor caps side by side.
If in USA, they were imported thru the DOT rules for grey market cars.