128 Sedan spring is very long... about 9.5 coils from memory...as is the bump stop assembly. coupe front strut is identical to sedan, just the spring height and rate is different, bump stop is shorter.
Rear coupe shock is slightly lower, the mount is about 6/8mm further up the strut tube... but what makes the ride height lower is the flatter arch...rate is about the same.
a112 is like a 127 strut, much shorter strut rod (but can use x19 inserts) and strut body...I found 127 struts too short myself and too low.YMMV.
SteveC