""I thought it was a TR4 - Moses came down the mountain in his Triumph. Ah well, just goes to show what I know...""
Think, O vertically challenged one!
The four wheeled TRs, from the 4 onwards, would skid if somebody spat on the pavement(sidewalk), and trip over a box of matches.
Of course he came down on two wheels, but I'd plump for the 1962 650cc Trophy TR6SS, with the two into one straight through exhaust and pre unit construction engine and gearbox.
Going up Box Hill, that could be heard all over Israel.