The engine was an inline six of 3.8 litres (3794 cc), based on previous Daimler sixes with pushrod operated overhead valves and retaining the 107.95 millimetre (4.25-inch) stroke, but with the bore increased to 86.36 millimetres (3.4 inches) from the 82.55 millimetres (3.25 inches) of the One-O-Four, giving a power output of over brake horsepower (kW) at 4,400 rpm and produced lb·ft (N·m) of torque at 2,800 rpm. The Majestic had a maximum speed of around km/h (mph). To help with the increase in the bore, the cylinder block was considerably enlarged to allow for the fitting of completely new liners: dry liners as present on the One-O-Four were absent on the Majestic.