A work vehicle comprising: an engine; a hydraulic pump driven by the engine; a work implement driven by hydraulic fluid discharged from the hydraulic pump; a travel apparatus driven by the engine; a power transmission device that transmits drive power from the engine to the travel apparatus; a controller that controls the power transmission device; wherein the power transmission device includes an input shaft, an output shaft, a gear mechanism including a planetary gear mechanism (68, 69), the gear mechanism that transmits rotation of the input shaft to the output shaft, a first motor and a second motor each connected to rotational elements in the planetary gear mechanism (68, 69), and a mode switching mechanism that switches a drive power transmission route in the power transmission device to one mode of at least two modes, varying the rotation speeds of the motors (MG1, MG2) varies a transmission speed ratio in the power transmission device, the transmission speed ratio is a ratio of a rotation speed of the output shaft to a rotation speed of the input shaft, the at least two modes includes a first mode, and a second mode used in a range with the higher transmission speed ratio than the first mode, the controller increases the rotation speed of the engine from a first rotation speed of the engine corresponding to a first vehicle speed when the vehicle speed increases beyond the first vehicle speed where the transmission speed ratio reaches a predetermined first value that is less than the maximum value of the transmission speed ratio obtainable by the power transmission device, and when the transmission route is in the second mode, the first value is greater than a second value of the transmission speed ratio at which the rotation speed of the first motor and the rotation speed of the second motor are equal. an engine; a hydraulic pump driven by the engine; a work implement driven by hydraulic fluid discharged from the hydraulic pump; a travel apparatus driven by the engine; a power transmission device that transmits drive power from the engine to the travel apparatus; a controller that controls the power transmission device; wherein the power transmission device includes an input shaft, an output shaft, a gear mechanism including a planetary gear mechanism (68, 69), the gear mechanism that transmits rotation of the input shaft to the output shaft, a first motor and a second motor each connected to rotational elements in the planetary gear mechanism (68, 69), and a mode switching mechanism that switches a drive power transmission route in the power transmission device to one mode of at least two modes, varying the rotation speeds of the motors (MG1, MG2) varies a transmission speed ratio in the power transmission device, the transmission speed ratio is a ratio of a rotation speed of the output shaft to a rotation speed of the input shaft, the at least two modes includes a first mode, and a second mode used in a range with the higher transmission speed ratio than the first mode, the controller increases the rotation speed of the engine from a first rotation speed of the engine corresponding to a first vehicle speed when the vehicle speed increases beyond the first vehicle speed where the transmission speed ratio reaches a predetermined first value that is less than the maximum value of the transmission speed ratio obtainable by the power transmission device, and when the transmission route is in the second mode, the first value is greater than a second value of the transmission speed ratio at which the rotation speed of the first motor and the rotation speed of the second motor are equal.