who won the 1921 isle of man tt senior race and by how much compared to the second and third place?
the 1921 isle of man tt senior race was won by howard davies, by a margin of 2 minutes and 3 seconds from freddie dixon, and bert le vack, in 4 hours, 9 minutes and 22 seconds, at a speed of 54.49 mph (87.69 km/h).