These images taken of a Czech owner's manual were originally obtained and published by Rnews.cz.
Compared to fourth-generation Megane hatch that it's based on, the new sedan is 271mm longer overall and rides on a longer wheelbase shared with the wagon, which features an extra 42mm.
It's likely that the sedan will be offered with the same set of engines available in the hatch and wagon, with volume-selling models powered by a 97kW/205Nm 1.2-litre petrol motor or 81kW/240Nm 1.5-litre turbo-diesel.
The sedan range will likely be headlined by a GT variant powered by a 151kW/280Nm 1.6-litre turbocharged four-cylinder petrol engine.
Renault confirmed in May that the new Megane sedan will make its global debut in 2016. Australian availability and timing is, as yet, unknown.