This forum compares the new Duramax and Cummins diesel trucks,and it is very informational. It includes specs and even ride quality observations. I would get the Cummins just because its cheaper for a truck with all the same luxuries. This source was helpful for me because I wanted to know which diesel truck would be a better value and I learned that the Cummins is the better value
This website talks about the specifications in a New Holland 9482. For example, what kind of engine does it have? What the horsepower is ?What type of transmission? etc.
This site is about the John Deere 8520 specifications. It talks about what the tractor has for a engine, horsepower, capacity for fuel tank, hydraulics etc. This site would be useful for any farmer that owns a 8520 or a tractor mechanic or looking to order parts.