The BRISTOL RE was the first of a new generation of Rear Engine single deck bus/coach chassis designed by Bristol Commercial Vehicles. In 1961 revised Construction & Use Regulations for commercial vehicles permitted 36-foot long buses/coaches for the first time in the UK. The RE became one of the first of this longer type.

By 1960 Britain’s bus operators were suffering a drop in passenger numbers (due to rising car ownership and changes in lifestyle). Bus companies wanted single deck buses with a higher seating capacity, which also offered the potential for One-Man-Operation.

With the engine at the rear, the floor of the RE bus sloped gently down  towards the front. This meant there were fewer and shallower steps, which made it easier and quicker for passengers to get on and off. 

RE chassis were built in three lengths and two heights:

• RESL: Short 32ft, Low 2ft 5inch bus;
• RESH: Short 32ft, High 2ft 8inch coach;
• RELL: Long 36ft, Low 2ft 5inch bus;
• RELH: Long 36ft, High 2ft 8inch coach;
• REMH: Maximum 40ft length, High 2ft 8inch coach.

The RE became the forerunner of today’s low-floor buses – with a Rear Engine.

Bristol RE chassis were made in two parts:

1. Rear one-third (including gearbox, rear axle & engine) were standard to all types.
   
2. Front/central two-thirds differed in length and also height. The two parts were bolted together ahead of the gearbox.

In early 1963 Bristol produced three prototype RE chassis:

The RE was a successful, reliable & robust  chassis. Its success was mainly due to three features:

• the gearbox is located in-front of the rear axle; 
• the drive shaft from the engine runs over a drop-centre rear axle into the gearbox. See illustration.
• the engine radiator is at the front, to take advantage of natural air flow. So, they don’t need a radiator fan.

These three design features improved weight distribution & road-handling. 

Until 1967 the Series 1 RE had a Gardner engine; manual gearbox; air suspension & air-over-hydraulic service brakes.

From 1967 the Series 2 RE was improved to make the chassis appeal to municipal and private operators. The changes were:

• Leyland engines O.600 or O.680 were offered;
• Self-Changing Gears semi-automatic gearbox  became standard;
• full air brakes became standard (parking brake remained manual);
• leaf springs became the norm (air suspension became an optional extra).

The last RE was built for a British mainland operator in 1975. 

RE chassis production continued until May 1983, but only for export to Northern Ireland and New Zealand.

4,629 Bristol RE's were built (from 1962 to 1983).

976 were RELH coach chassis. 413 had Eastern Coach Works bodies like Ruby. 24 of these survive.

Our archive shows original documents for Ruby.

Bristol built most of the RE chassis themselves, in their own foundry & chassis assembly line.

Like all chassis manufacturers, they bought-in various specialist parts.