PORSCHE purists will have all eyes on this year’s Frankfurt motor show in September, as a highly collectable Speedster version of the already desirable 911 is rumoured to make its debut for the crowds.

Our Pommy sister publication Car has the scoop on the sexy convertible version of Porsche’s most epochal model, and says it was given a steer on what to expect at the European auto show next month.

While a new generation of the Speedster will be a welcome addition to the 911 range, its unveiling will not be the most surprising of debuts at the show, with the car maker previously offering the variant for the 930 (above), 964 (below), and 997 generations of the 911.

Until the model is confirmed, all other details will have to remain speculative, including what will power this exclusive version. But in its previous 997 iteration (below), the Speedster took its underpinnings from the 911 GTS and a repeat strategy for the 991 is not out of the question.

Porsche coined the Speedster name in 1957 with a convertible version of the 356 A and the 911 versions honour the original with the more accentuated hump above the roof mechanism and engine.