With a higher ratio it means that even though the engine speed may remain the same, the rear wheels turn faster, so the bus goes faster.
On close examination the rear axle was found to be in quite good condition.
And the greatest surprise of all was that it was already the higher ratio: how could this be?? According to all the known wisdom, Sydney Albions were limited to 32 mph by having a 6/24 axle ratio. (don't worry about remembering that). Albert has a 5/27 axle: photographic evidence:
Further proof, as if the stamp on the case could be wrong! There it is, stamped into the pinion itself: 5/27.