The Learjet 45XR improved on both the Learjet 45 and 40 with upgraded engines and higher performance. The 45XR uses the same general seating configuration of the 45, carrying eight passengers in double club layout.
The basic improvements to the cabin include about 6 inches more legroom, 2 inches more seat width, and increased storage space in the galley.
With two updated AlliedSignal TFE731-20BR turbofan engines, the Learjet 45XR can carry more passengers at higher speeds and over longer distances. The aircraft also has improved hot-and-high performance, climbing rates, and higher takeoff weights.