By the HLDI's definition in your link, the F30 should be a Midsize car.
Midsize: Length 457.3–495.3 cm (180–195 in) and wheelbase 266.8–279.4 cm (105–110 in)
Length = 182 inches
Wheelbase = 110.6 inches
In terms of wheelbase alone, it would classify as a Large car by that same definition.
Point being, it seems a little silly referring to a car that large as a compact.