The 8770 and 8870 Genesis tractors are some of the most fuel efficient tractors ever made. Trouble is, the only way you'll realize the full fuel efficiency of the 8770 is to load it to at least 75% of rated PTO HP, which would be a lot more than it takes to develop 20kW. At lower power ratings, I don't think you'll do all that much better than the 4000, and as others have pointed out, running the 8770 isn't cheap in terms of what a tach hour costs you on a trade-in or sale. Also, consider this: The 4000 will probably go up in value in the future as an antique because it is in such nice condition, so you'll likely not even lose value on the 4000. Oh, and should you put enough hours on the 4000 to warrant a rebuild -- it has to be easier to rebuild that cute little machine than an 8770. |