Originally Posted By: bunnspecial
The MG is so high because 4th gear is 1:1 Also, as mentioned above, it's sort of "ideal" for sustained high RPM action since it's a typical small bore, long stroke British pushrod 4. It's happy to run at 4K all day.
This was universally normal...it's hard to tell with all indirect gearboxes, but in rear wheel drive boxes, 4th gear is normally direct, 5th overdrive. Motorcycles still run these sort of ratios, so like the MG, they are always ''in the zone'', and the higher rev limits give higher top speeds than cars.
My Volvo does about 2,400rpm, my motorcycle about 4,500rpm at those speeds.