Audi has released a series of official sketches depicting an urban based concept car it plans to unveil as part of a new city mobility project at next month’s Frankfurt motor show.

The new two seater, referred to simply as the urban concept, brings together contemporary design, construction, packaging and driveline ideas on a compact city runabout reminiscent of the iconic Messerschmitt Kabinenroller with a touch of good 'ol Lotus Seven thrown in for good measure.

Further details remain scarce, but Wheels can reveal Audi is preparing other less extravagant versions of its new urban concept, which it also plans to put on display in Frankfurt in a bid to gauge public reaction before deciding whether to progress them further.