Hornby的模型火車係幾多比幾多?

hornby 的模型火車所採用的是 HO比例，即是 1:87


http://jacktong.serveftp.net/jacktong/train/html/intro.html

Hornby's models are making in 1:76 or OO scale, which little bit bigger than regular HO. It is because the propulsion system of British trains is bigger than European and American. HO scale cannot fit with British trains.
Check the Wikipedia.