Developed by the SNCF’s Autorail Design Division (DEA), the RGP II
(Rames à Grand Parcours bimoteur) were long-distance diesel
multiple units powered by two Renault type 517 engines delivering
300 hp at 1,500 rpm — the same engines used in the X 2400 and X
3800 autorails. Built between 1954 and 1955 in just 20 units, each
RGP II consisted of a motor car (X 2700) and a driving trailer (XR
7700), forming a permanently coupled set in regular service. The
RGP II could be coupled with other RGP I or RGP II sets, and were
originally delivered in a distinctive green and cream livery,
unlike the more common red and cream of other SNCF railcars. Key
features of the HN2635, HN2636, and HN2637 models:
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