The all-new BMW 8 Series was revealed in coupe form not too long ago but we already know that there are two other body styles – a convertible and four-door – that will be introduced later on. New patents filed with the Brazilian National Institute of Industrial Property give us some idea what the drop-top 8 Series and Gran Coupe variant might look like.

The convertible is almost identical to the coupe aside from its retractable soft top, which isn’t much of a surprise given what we’ve seen in previous spyshots. Adjustments to accommodate the folding roof will include a redesigned rear deck so the roof has somewhere to park itself while still offering some boot space. This could affect rear passenger space as a result, while other changes include relocating the third brake light to the boot lid lip spoiler.

As for the 8 Series Gran Coupe, we’ve been shown a preview of it earlier this year with the Concept M8 Gran Coupe. Unsurprisingly, the front mirrors that of the coupe and convertible, albeit with an additional slat on each of the corner inlets on the non-M Sport bumper.

Beyond that, the patent image shares a lot in common with a rendering posted by us just a few days ago, although the rear window appears to a little less rakish from the patent’s angle of view. As the more practical version of the 8 Series, an slightly extended wheelbase and interior space is to be expected.

In terms of engines, these new variants should share the same options as the 8 Series Coupe, including a 3.0 litre twin-turbocharged straight-six (320 PS and 680 Nm) and 4.4 litre biturbo petrol V8 (530 PS and 750 Nm).

GALLERY: BMW 8 Series Convertible spyshots

GALLERY: BMW Concept M8 Gran Coupe

GALLERY: BMW 8 Series Coupe