The body design could be fitted to number of different chassis, which included products from AEC, Daimler, Guy and Leyland amongst others.

Most of the bodies incorporated a 'tin radiator cowl' which was basically a full width bonnet and front panel. However the Leyland Titan could also be supplied with the older style exposed radiator.
The radiator cowls varied in design depending on the chassis manufacturer, each having its own distinctive look.

The original Orion bodies were built to the then maximum length of 27 feet 6 inches, but later versions were increased to the new legal limit of 30 feet.

The Orion was available with the traditional open rear platform or could be supplied with powered platform doors.


THE EFE MODELS
The EFE Orion models are all based on the early 27 feet 6 inch variant, with the traditional open rear platform.
The AEC Regent V (197) and the Daimler CVG6 (198) both have full width tin radiator cowls, while the Leyland Titan PD2/12 (200) has the older style exposed radiator.

All three EFE versions share the same upper, and main lower deck castings, the only difference being the casting used for the bonnet or tin radiator cowl.
All three versions had their debut in 1995, with a steady flow of models following until 1999, after which only the occasional issue has occurred.