Weighing in at 28 tons and 691 max engine horsepower.
重量为 28 吨，发动机最大功率为 691 马力。
奇趣工程百科
The four new 9RX tractor models, which range from 470-620 engine horsepower from John Deere, feature a big undercarriage and track system designed to give higher power, durability, and improved riding quality, especially while handling large implements in the field.
Engine power or horsepower is the maximum power that an engine can put out. It can be expressed in kilowatts or horsepower. The power output depends on the size and design of the engine, but also on the speed at which it is running and the load or torque. Maximum power is achieved at relatively high speeds and at high load.