The upcoming Porsche 911 Targa has been spied with its roof off on test in Germany. The pictures reveal that Porsche has returned to a classic, retro-style removable roof for its 991-generation 911 Targa, rather than the sliding glass roof seen on the previous 997 generation.

The pictures also reveal a wraparound effect for the B-pillars over the roof, in a nod to 911 Targas of old. There is also a convex rear screen, which is bespoke to the Targa.

The 911 Targa is expected to be all-wheel-drive only. The launch of the new open-top model has been preceded by the recent unveiling of the 911 Carrera 4 and 4S models at the Paris motor show.

The Targa’s engine line-up should mirror that of the 911 coupé and cabriolet, meaning 345bhp 3.4-litre and 395bhp 3.8-litre flat six engines.

It is expected to go on sale in the middle of next year after a spring show debut. Next year will also herald the launch of more performance-focused 911s, starting with the GT3.