Both of the original designs are larger than the newer version and have curves that are almost flat. It was offered in two sizes: 102 foot long and 36 foot or 51 foot wide.
The larger version has dips between all four 90 degree turns. The smaller version has two 180 degree turns at either end.
The newer design was introduced in 1960 and is both taller and more compact than the two original designs. It also has banked corners and a new train with curved fronts. It has a footprint of 108 feet by 33 feet.
There are at least two Allan Herschell trains. One has a curved front whilst the other has a flat front.