The 2.5 really isn't a dog, people feel they need race car performance from a jeep. Jeep are meant for off road. A 2.5 jeep will go anywhere off road that any other jeep will. They will do the speed limit on the road. I've had a couple of 2.5 jeeps over the years and they were a blast to wheel around in. With the 2.5, you don't want to over tire it. Run 31X10.50's and change gears to 4:56, or 4:88 and there quit peppy. You want a little more zip, install an intake, 4.0 tb, spacer, rollor rockers, cam, header and an e-fan. This will make a 2.5 jeep fun to drive. People want to put 35" tires on there 2.5 powered jeeps and thats just wrong. 31's are enough tire for most trails and do fine. People tend to want to run more tire than they need just because it looks cool. At over 200.00$ a pop, I'm over what looks cool and more into what works best for the kind of wheeling I do. On my built 258 with 4:10 gears I still only run 32X11.50 tires, cause thats all the bigger tire I need for what I do. My 258 has a holley 4 barrel, offy intake, comp cam, rollor rockers and so on, so I have the power, just don't need huge tires.
1987 wrangler, 258 I-6, 5-speed.
2007 liberty sport 4X4, automatic
2009 ford ranger 4x4 FX4 OFF/ROAD, 5-speed