BMW has released a teaser image for its new drop-top Z4 sports car, which will be revealed in full at the Pebble Beach motor show in California next month.
While only the outline of the car is visible in the image, Autocar says it appears to have a "pair of buttresses" located behind the seats, although the production version is expected to feature "a more conventional folding soft top".
The image also suggests the new drop-top will have a more angular design than the rounded edges of the current Z4. It has a small rear wing that Car says looks like the decade-old Porsche Carrera GT supercar.
As the company has chosen the Californian-based motor show for the car's public debut, AutoExpress says it expects it to appear in concept form "rather than the finished product".
This would be a similar move to the firm's unveiling of its 8 Series coupe, the magazine says, which first appeared as a concept at this year's Concorso d'Eleganza Villa d'Este motor show to "whet the appetite for the production model."
"One thing we do know about the next Z4 is that it will share the same platform as Toyota's next generation Supra", says Evo, as "both cars have had similar GT-like proportions and it's easy to see that both could easily share the same underpinnings".
The new Z4 could also be powered by a range of both four and six-cylinder turbocharged engines, it adds, while a more powerful M variant will probably appear "some time in the future".
More details, such as performance figures and prices, are expected when the car makes its public debut on 17 August.