For which application, and what's your criteria of 'best'? Power, torque, fuel economy? Traditionally, the Detroit Diesel 60 series has been the leader for fuel economy. However, after 2002, they only became available on Daimler A.G. products (Freightliner, Sterling, Western Star). Caterpillar and Cummins generally have a wider torque band better suited to heavy haulage and sitework driving. However, Caterpillar left the highway diesel market in 2009.
You also have to consider weight. A 15.8 liter Caterpillar C16 is an attractive option for someone seeking power, but that's also a lot of weight, which may make it undesirable for some purposes - especially for someone who hauls by the ton.
Then, there's the application. If you're just doing regional runs in a flat area, then you can do fine with a 12.8 liter motor and 3.58 rears. But if you're hauling cross country in varying terrain, that setup may not be so ideal, and you may instead prefer a 14 - 14.6 liter motor.
So it's difficult to say which motor is the 'best' without knowing your criteria, but based on my own experiences, there is one I can tell you to avoid - the Volvo D16. A powerhouse when it runs properly - keeping it running properly is the difficult part.
The best tractor engine specifications will depend on what tractor is being fixed. The transmission specifications that often work include around 400 horsepower, and include a V4 engine.
You need to specify which application you had in mind. When you say 'tractor', you could be referring to riding mowers, farm tractors, highway tractors, etc. The best highway tractor isn't going to be the best riding mower and vice versa, suffice to say.
The best combined semi tractor with a conventional aerodynamic design is a Navistar international. The best engine and transmission combination is depended upon the use of the semi tractor. Many people desire a Caterpillar engine and a Rockwell transmission.
second Question has better information Aerodynamic Cab 600hp Caterpillar Tractor Engine with Eaton 13 or 18 speed Transmission
depends. does the tractor have wheels?
well yes they can because my uncle has a tractor in dominican republic and he can operate everything and he go with his tractor in th highway with license
It is legal to drive a tractor on the highway as long as you are going directly on the side to where you will take it and do your work.
no, because a tractor is not allowed on a highway even if you do have a license to drive
yes
imperial or U.S.?
On a highway, no but you can on back roads.
can a person temporarily drive a tractor on a highway with a driver license