When I First started driving I got through 3 citroen GS cars.
They were smaller than the cx and had a 1300cc air cooled lump with a flat 4 configuration like the bmw motorbike except 4 cylinders instead of two.
Had the same hydroelastic suspension system.
Excellent, I'm not the only one with a looney taste in cars. Love GS Citroens, had a BX, Ami 8, Renault 16 TL and TX, 2 CX's an XM...and some others I would rather not reveal