Nothing slower than an old U-Haul. I wouldn't make that the standard of measurement.
Here are the published curb weights for various 1990 RBVs:
Base SWB 2wd Ranger: 2,819#
Ext cab 2wd Ranger XLT: 3,159#
Ext cab 4X4 Ranger XLT: 3,464#
Bronco II 4x4 XLT: 3,385#
1991 Explorer Sport 4x4: 3,824#
1991 Explorer XLT 4dr 4X4: 4,012#
Here are the published curb weights for various 1990 RBVs:
Base SWB 2wd Ranger: 2,819#
Ext cab 2wd Ranger XLT: 3,159#
Ext cab 4X4 Ranger XLT: 3,464#
Bronco II 4x4 XLT: 3,385#
1991 Explorer Sport 4x4: 3,824#
1991 Explorer XLT 4dr 4X4: 4,012#