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Porsche Reportedly Developing S1 Flagship with Flat‑Eight Engine

Reports indicate the S1 would reflect a strategic shift toward high‑margin combustion supercars under tighter cost controls.

Overview

  • Multiple outlets reported on Sept. 21–22 that German paper Handelsblatt says Porsche is working on a range‑topping model codenamed S1 that would use a flat‑eight boxer engine, a configuration not previously used in a Porsche production car.
  • Porsche’s eFuel project manager has confirmed testing of a 5.0‑liter twin‑turbo flat‑eight prototype that made about 750 hp, 728 lb‑ft of torque and revved to 9,000 rpm, though the company has not linked that test engine directly to the S1.
  • Handelsblatt and trade coverage say the S1 would start near €500,000 if it reaches market, and reports suggest Porsche may reuse Volkswagen Group supercar platforms such as Lamborghini’s Temerario or Audi’s Nuvolari to lower development costs.
  • The story is framed as part of CEO Michael Leiters’ strategy to pivot toward exclusive combustion models and reduce output, with Handelsblatt reporting roughly 4,100 additional job cuts beyond earlier reductions as part of cost measures; Porsche has declined to confirm these plans.
  • If produced, the S1 would join Porsche’s history of bespoke range‑toppers like the 959 and Carrera GT and would signal how the brand plans to use specialty, high‑margin models to help rebuild profit after heavy EV investment and weaker sales in China.