Seddon Atkinson Pennine 7
Series: Other models
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The Seddon Atkinson Seddon Pennine 7 is a bus from Seddon Atkinson. 184 kW is available. Gardner 6HLXB horizontal I6 diesel acted as the engine supplier.
Gearbox: ZF synchromesh 4 and 6 speeds Self-Changing Gears direct-acting air operated semi-automatic epicyclic and electric control and 4 and 5 speeds. Overall length is 36 mm.
Seddon Pennine 7 – a British bus chassis with a horizontal Gardner six-cylinder: 6HLXB engine, a synchronised ZF gearbox or a Self-Changing Gears epicyclic transmission, named after the Pennine hills
Seddon Atkinson was a British commercial-vehicle maker formed from the merger of the two long-established truck builders Seddon and Atkinson. The Pennine 7 belonged to the company's Pennine range, named after the British hill range, supplying chassis for bus and coach bodies from independent body builders.
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The Pennine 7 is powered by a horizontal six-cylinder diesel engine from the British maker Gardner, the 6HLXB. Power is transmitted, depending on the version, by a synchronised ZF gearbox with four or six speeds or a semi-automatic, air-operated epicyclic transmission from Self-Changing Gears with four or five speeds.
The horizontally mounted Gardner engine allowed a lower vehicle floor than an upright engine, an advantage for coach and service-bus bodies wanting as much interior space as possible. The choice between a classic manual gearbox and the semi-automatic Self-Changing Gears epicyclic transmission depended on the intended use: service buses benefited from the more comfortable automatic, coaches often from the more economical manual gearbox.
For a used Pennine 7, check the condition of the horizontal Gardner six-cylinder at the oil-pan seals and injection pump, the operation of the fitted gearbox or epicyclic transmission, and corrosion on the chassis frame and on the bodywork of the respective builder. Since Gardner engines are no longer produced, parts supply today is limited to specialist British heritage commercial-vehicle firms.
Sources: SpecCodex-Register: Kennwerte des Modells Seddon Pennine 7
Technical data
Engine
| Engine | Gardner 6HLXB horizontal I6 dieselcorrect |
|---|
Drivetrain and chassis
| Gearbox | ZF synchromesh 4 or 6 speeds Self-Changing Gears direct-acting air operated semi-automatic gearbox epicyclic, electric control, 4 or 5 speedscorrect |
|---|
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 2 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Sources: Wikipedia (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Bus in 3D section
Turn the model, look inside and click an assembly — each one is explained.
