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The Bristol HG was a truck produced by Bristol Commercial Vehicles between 1952 and 1956. The term HG stands for Heavy Goods.

The vehicle was exclusively built for the British Road Services built. Bristol Commercial was in the wake of the nationalisation of the British transport industry under the control of the British Transport Commission. Immediately after the Second World War in Britain, there was a severe shortage of heavy trucks, many small carriers were not powerful enough for long haul. The resulting problems in the transport industry was the reason for the formation of the BRS. To fix the problem, the BRS gave a contract to develop a major, four-axle chassis with a total mass of 22 tons. Similar vehicles were the Leyland Octopus and AEC Mammoth Major.

Bristol Commercial had no experience in the development of heavy-axle trucks. Bristol Commercial Vehicles developed 8.14L DHS-engine that was not powerful enough to operate the vehicle with a trailer. Therefore the O.600 of Leyland Motors, a diesel engine with 9.8 l displacement was used. Later this engine was replaced by the Leyland O.680. Such vehicles were given the name HG6L (Heavy Goods six-cylinder engine from Leyland). The first vehicles were delivered in 1952, with the total length of the chassis being 9093 mm (29 foot 10 inch). The engine drove through the clutch and a Bristol five-speed gearbox. The single-reduction rear axle was considered to be sufficient, since the truck should only be used in the UK. The electrical system was 24V. The fuel tank had a capacity of 32 gallons (about 145 liters), which allowed a range of about 300 miles (about 482 km). COE bodies came from different manufacturers. Production of the HG ended after four year the 1956.