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[HughMiller]

Setright gives:
length 191.5 in, 486cm
width 67in, 170cm
height 60in, 153cm.
That agrees with what the Bristol workshop manual says (though, oddly, the manual doesn't give length) - except that Bristol says that 60in is equivalent to 152.4cm. I haven't worked out the conversion to check, but perhaps this is another example of Setright's inaccuracy.