Not 100% positive on the 1994 but a 1992 Ranger XLT 4 cyl has a 16 gallon tank. My 94 supercab holds 18 gallons.
Mine hold 17 gallons.
The SuperCab holds 20.5 gallons
The 2005 Ford Ranger ( SuperCab ) holds ( 19.5 U.S. gallons )
19.5
Close to 10 gallons
19.3 Gallons
18 gallons
16.5 gallons
about 8.5 gallons
16 gallons
15 Gallons