The successor to the 550 A made its debut in 1957 as the 718 RSK. Motorsport and technology were closely intertwined in its name. While the “RS” stands for “race sport”, the “K” referred to the newly developed front torsion bar springs. They were arranged in the form of a capital “K” on its back.
The 718 was further improved to address all concerns compared to its predecessor. A frame made of seamless steel tubing gave it high strength and an ideal lightweight design. The engine, chassis and drum brakes were also further optimized.
The 718 RSK celebrated successes across the globe, e.g. at Le Mans, the Nürburgring, in Argentina, Riverside in California and at numerous hill climb races. The 550 A Spyder and the 718 RSK both proved the enormous potential of their Porsche designs in Formula-2 racing. Further developed into a monoposto, the 718/2 even won the Formula-2 manufacturers world championship in 1960.
Photos by Robin Adams courtesy of RM Sotheby’s
