As Eric said "weight is good". Weight = Traction. especially when hooked up to some ground engaging equipment. As you mentioned in a car you look at power to weight ratio. The lighter the weight the easier it is to reach speed, or as it is known velocity. Now with a tractor, speed isn't such a factor. your looking more to just maintain momentum, which is inertia. It is more important to maintain traction, so that you can keep up your momentum. At 32hp you will have more than enough power to the wheel, as you can always adjust it by shifting between gear ranges. more important in a CUT is providing enough pto hp to power whatever size of pto driven implement you want to use, without lugging your engine out of its power band.
Yes torque specs. would be nice. But it would be hard to make them relavent to each individual use. As they are affected greatly by the number of gears that you have multiplied or divided by the ranges, as well as effected by the size of tires that you are running.
Could you fill us in more on what your needs are for this tractor. Will you need it for Landscaping, excavation, land clearing, yarding out trees, mowing, etc.
I have a New Holland TC29 equipped with a Woods 1012 loader and Woods 7500 Backhoe. This would be an almost identical pkg to the TC33D that your are looking at. And I use it for my part time property maintenance business, which includes small residential excavation, landscaping, tilling, mowing both feild and estate. I actually downsized this last year from an older Kubota L345DT. this smaller size Class II New Holland lets me maneuver in and around existing buildings, trees and lanscaping much better. and yet has enough power to handle decent sized implements in a time effeicent manner.