Rev clock shows lower rpm reading!!! ( 1993 Camry)
 

My 1993 Camry shows incorrect rpm reading. From a cold start the rev clock is just above 0 rpm. On the highway, at about 80mph it show 2000 rpm.
Can anyone help ?
..oh car specs:

1993 Camry LE
2.2L , automatic
just above 89,000 genuine miles . ( Car was parked most of its life by previous owner ).

Help!