Taken from wiki :
There is Viktor Gulenko's hypothesis of four temperaments in socionics. 
Extraverted Rational Temperament (EJ). Extraverted rational types, namely the ESE, EIE, LIE, and LSE, are characterized by energetic and proactive behavior. (close to choleric temperament)
Introverted Rational Temperament (IJ). Introverted rational types, namely the LII, LSI, ESI, and EII, are characterized by slow and methodical behavior. (close to phlegmatic temperament)
Extraverted Irrational Temperament (EP). Extraverted irrational types, namely the ILE, SLE, SEE, and IEE, are characterized by impulsive and unpredictable behavior. (close to sanguine temperament)
Introverted Irrational Temperament (IP). Introverted irrational types, namely the SEI, IEI, ILI, and SLI, are characterized by lack of motivation, inertia, and unstable moods and energy levels. (close to melancholic temperament)
My question is it accurate to compare ancient temperaments with socionics temperaments? It does fit for me but I wonder if it is the case for others, knowing IEE's considered to be the most introverted extroverts and Delta as a whole to be quite low key in terms of expression.