YES, The 1992 Jeep Wrangler 2.5 liter engine (4 Cylinder) Does have a timing chain. I just finished a rebuild of My 2.5 and it does in fact have a Chain.
timing CHAIN
The 1.6 liter four cylinder has a timing BELT and the 2.0 liter four cylinder has a timing CHAIN
The 1.6 liter , 4 cylinder has a timing BELT and the 2.0 liter 4 cylinder and the 2.5 liter V6 engines use a timing CHAIN
Your 2.4 liter - 4 cylinder - has a timing CHAIN
The 2.4 liter 4 cylinder has a timing CHAIN but the 3.0 liter V6 has a timing BELT
Timing CHAIN ( 2.3 liter 4 cylinder and 3.0 liter V6 engines )
The 3.3 liter V6 has a timing CHAIN and the 2.4 liter , 4 cylinder , has a timing BELT
Your 1.8 liter - 4 cylinder has a timing CHAIN
The 2.3 liter 4 cylinder and the 3.0 liter V6 have a timing CHAIN
The 2.3 liter four cylinder engine in a 2006 Ford Escape has a timing CHAIN
The 2.0 liter 4 cylinder has a timing BELT and the 2.5 liter V6 has a timing CHAIN