CONTROLLER FOR A VEHICLE DISPLAY SYSTEM

A vehicle display system is configured to display instantaneous power delivery of a powertrain of the vehicle as a proportion of the instantaneous power capability of the powertrain. A controller for the vehicle display system comprises an input configured to receive data relating to a condition indicative of a limitation on the instantaneous power delivery and/or power capability, a processor configured to determine from the data whether the condition meets at least one predetermined criterion and an output configured to output a signal to display the limitation in relation to the instantaneous power capability of the powertrain when the condition meets the at least one predetermined criterion.