As a 'pseudo-Jaray' fastback, she suffered significant vortex drag.
At Cd 0.362, she's dirtier than a 2012 Dodge RAM 1500 eco.
Tatra's 87 of the same year was Cd 0.36.
Porsche's 60K10 perhaps Cd 0.20.
Considering that a 'typical' saloon of the day was Cd 0.64, they were all to be applauded.