With impressive understatement the John Deere website refers to its 9RX range of agricultural machinery as "high-horsepower tractors". We always like it when the Christmas road test has a unique claim ...

Rarely has there been so much preamble and orchestrated PR faff for the debut of an agricultural machine as there has been for the launch of John Deere’s four-track 9RX tractor. For the past year, ...

John Deere has made plenty of big machinery in the past, but this one is the green-and-yellow’s largest ever. It’s called the 9RX 830, and thanks to its 18-liter turbodiesel engine, it’s also the most ...

John Deere’s new 9RX 830 is the biggest, most powerful and most expensive tractor ever to go into series production. In pure horsepower terms, it can be bettered only by the 1,100hp custom-built Big ...

When Simon Doolin was asked to be part of a group of only 12 people from across the globe to contribute farmer feedback to the design of the John Deere 9RX 830, it was an unparalleled opportunity to ...

This article is brought to you by our exclusive subscriber partnership with our sister title USA Today, and has been written by our American colleagues. It does not necessarily reflect the view of The ...

Even if you tow a caravan or a trailer behind a car you'll know about all of those things, and the same principles of physics apply here, except on a much bigger scale. In this case, that scale is ...