To be unveiled in November, the new concept promises to revolutionise all the aspects of the T.25, redesigned from the ground up.
The T.25 was first unveiled in 2009 as a three-seater, rear-engined design with an appearance harbouring similarities to the current Renault Twizy.
Redesign aside, the new T.25 concept will still retain its city car practicality but adopt a new name; Project M.
Lighter materials in line with technical advancements since the original will be used in the new concept, and the drivetrain is also set for an overhaul with the aim of maximising efficiency.
Shell engineers will take charge of the project, aiming to produce a car that could serve city-dwellers now and in the years to come as cities become ever-more congested.
An unveiling of the 2015 Project M is set for November, ahead of an appearance at the Shell Americas Eco-Marathon in 2016.
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MORE News & Reviews: Gordon Murray | City Cars | Concept