2019 BMW i8 Roadster Convertible Folding Roof Explained – Video

The electrically operated soft-top roof opens and closes in less than 16 seconds, folding in three segments into a vertically oriented ‘Z’ and uniquely stowing behind the passenger compartment in a perpendicular position. That, in addition to a 3.5-cubic-foot storage area takes the place of the Coupe’s +2 back seats. We can’t imagine anyone will miss them. The 4.7 cu.-ft. trunk is untouched.

Similar to the outgoing BMW 6 Series, the rear window is separate from the convertible roof, allowing it to act as a wind deflector when raised. It automatically does so by about 2 inches when the roof is lowered, but the driver can alter its height to adjust air flow as desired.

The roof itself is also noteworthy for its construction, much like the entire carbon-fiber-extensive i8. The aluminum elements that connect the roof to the body are produced using a 3D printing process. According to BMW, this breaks new ground in the automotive industry, allowing “the topologically optimized bracing to be produced in geometric form, which would not be possible using conventional casting techniques and ensures an optimal balance between component rigidity and weight.” Nifty.

In total, the i8 Roadster weighs 3,513 pounds – 132 more than the i8 Coupe.