The best-selling international album of 1981 in Portugal is SUPER TROUPER by ABBA.
Rank Artist Album Released
1
ABBA
SUPER TROUPER
1980
2
TAXI
TAXI
1981
3
DURAN DURAN
DURAN DURAN
1981
4
JOHN LENNON & YOKO ONO
DOUBLE FANTASY
1980
5
VARIOUS ARTISTS
TOP STARS
1981
6
THE ROLLING STONES
TATTOO YOU
1981
7
AC/DC
BACK IN BLACK
1980
8
KIM CARNES
MISTAKEN IDENTITY
1981
9
VARIOUS ARTISTS
SUPER POLYSTAR
1981
10
UHF
À FLOR DA PELE
1981
Source: Música & Som