This is some data: Alvis Speed 25, transmission, "single plate clutch, separate 4-speed gearbox all-silent and all-syncromesh, centre change lever, open tubular propellor shaft with metal joints , spiral bevel fully floating back axle"; Alvis Speed 25, engine, 31.48 tax horsepower.

Generate a detailed description of this data
The Alvis Speed 25 has an engine capable of producing 31.48 tax horsepower and the transmission system comprises a single plate clutch, separate 4-speed gearbox all-silent and all-syncromesh, centre change lever, open tubular propellor shaft with metal joints and spiral bevel fully floating back axle.