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Originally Posted by Muddy Oval
There's no real compelling reason to replace a working 2.25 with a 2.5. The tdi's will not necessarily make it much faster, but taking hills won't be so embarrassing. If my 2.25 dies, I have a 2.5 on standby. The only thing it would gain is a little efficiency.
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I'm guessing A) You never drove anything with a 2.5NA. It is no more efficient than the 2.25, and is in every way, an equal dog.
I'm guessing B). You never driven a series with a 200 Tdi. While a good running 2.25 gasser with OD can easily hold 65mph on the flats, it slows way down on any incline. The same truck can do 65 without taking a second breath with a 200, and faster is easy enough, though I'm not going there in a 2A, It's just too fast for comfort. The big difference is on those inclines. It will barely slow down on the longest hills. Bottom line; if you can go as fast, or faster, and not slow down, getting from A to B is gonna be quicker. The bottom end torque of the Tdi engines (200 or 300) is so good, you will find yourself using lowrange off road much less.
Since the gap between the wings is the same on series and Defender, you can get away with a Tdi Radiator/intercooler, but the custom, larger intercoolers make a huge difference.
