What is "powerband"

n. The range of operating speeds under which an engine or motor is able to operate efficiently, defined by the range from peak torque to peak horsepower (or sometimes to redline).

Powerband is a Formula 1-style racing game for the Acorn Archimedes published in 1990. It was written by Gordon J. Key and published by The Fourth Dimension. The game was released on a single 3.5" floppy disc.