An intake assembly for an internal-combustion engine comprising a plurality of cylinders, wherein the intake assembly includes: an intake duct for each cylinder of the internal-combustion engine, and an airbox defining a volume with which each intake duct is in fluid communication, said airbox being in fluid communication with the external environment by means of an intake mouth and comprising, inside it, a filter element designed for filtering a flow of fluid taken in by the internal-combustion engine; and each of said intake ducts being in fluid communication with said airbox by means of a respective throttle body including a throttle valve operable for regulating a flow rate of fluid taken in by the internal-combustion engine; said intake assembly comprising: a monitoring channel, which connects said intake ducts together, configured for perturbing in a negligible way the dynamics of the fluid inside the intake ducts; and pressure-sensor means associated to said monitoring duct for monitoring the pressure within said monitoring duct and consequently designed to send signals indicating the value of pressure of the fluid taken in by the engine to an electronic control unit, the intake assembly being characterized in that it comprises temperature-sensor means associated to said monitoring duct for monitoring the temperature inside said monitoring duct and consequently designed to send signals indicating the value of temperature of the fluid taken in by the engine to an electronic control unit. an intake duct for each cylinder of the internal-combustion engine, and an airbox defining a volume with which each intake duct is in fluid communication, said airbox being in fluid communication with the external environment by means of an intake mouth and comprising, inside it, a filter element designed for filtering a flow of fluid taken in by the internal-combustion engine; and each of said intake ducts being in fluid communication with said airbox by means of a respective throttle body including a throttle valve operable for regulating a flow rate of fluid taken in by the internal-combustion engine; said intake assembly comprising: a monitoring channel, which connects said intake ducts together, configured for perturbing in a negligible way the dynamics of the fluid inside the intake ducts; and pressure-sensor means associated to said monitoring duct for monitoring the pressure within said monitoring duct and consequently designed to send signals indicating the value of pressure of the fluid taken in by the engine to an electronic control unit, the intake assembly being characterized in that it comprises temperature-sensor means associated to said monitoring duct for monitoring the temperature inside said monitoring duct and consequently designed to send signals indicating the value of temperature of the fluid taken in by the engine to an electronic control unit. a monitoring channel, which connects said intake ducts together, configured for perturbing in a negligible way the dynamics of the fluid inside the intake ducts; and pressure-sensor means associated to said monitoring duct for monitoring the pressure within said monitoring duct and consequently designed to send signals indicating the value of pressure of the fluid taken in by the engine to an electronic control unit, the intake assembly being characterized in that it comprises temperature-sensor means associated to said monitoring duct for monitoring the temperature inside said monitoring duct and consequently designed to send signals indicating the value of temperature of the fluid taken in by the engine to an electronic control unit.