all Si's had sunroofs and fuel injection, with alloy wheels. [13" in '85, 14" all others]
DX's have cast iron rear drum brakes, and 13" steel wheels with hub caps [if not missing]. Factory options for the DX were rear window louvers, and mudflaps
HF's have aluminum rear drum brakes, 13" wheels, no hubcaps

'85, two-tone paint, color over silver, recessed headlights.
'86, two-tone paint, color over grey, flush headlights
'87, solid color paint, flush headlights

The pic of the blue '85 Si has the stock factory alloys, the '86 and '87 had the 4 circle alloy wheels.

The orginal picture is an '86 DX, assuming everything is stock on it, those are factory hub caps.

I may be off, but these are the guidlines I use when looking at first gens, and I've yet to mis-identify a car.