A Porsche 911 Named Edith Drove to 6,734 Meters. It's the Highest a Petrol Car Has Ever Been.

In December 2023, a specially modified Porsche 911 reached 6,734 meters above sea level on the flanks of Ojos del Salado, a volcano straddling the border between Argentina and Chile. That number — 22,093 feet — is the highest altitude ever recorded by a petrol or diesel car. The Porsche Museum in Stuttgart is currently hosting an exhibition on the achievement. ## The Expedition Racing driver Romain Dumas led the team using two modified 911 Carrera 4S prototypes, named Doris and Edith. Dumas is not an amateur adventurer; he holds the outright record at the Pikes Peak International Hill Climb and has class wins at Le Mans. His presence in the expedition connects it to a tradition of Porsche endurance engineering that dates to the 1950s, when the brand first began competing in long-distance racing on standard production components. The modifications to Doris and Edith were comprehensive: portal axles to increase ground clearance by 80mm, extensive underbody protection for the volcanic rock terrain, specialized thermal management systems calibrated for thin-air conditions, and cold-weather packages addressing the extreme temperatures at altitude. Both cars ran on synthetic eFuels — a detail that matters far beyond the expedition itself. ## Ojos del Salado at 6,000 Meters Ojos del Salado is the world's highest active volcano at 6,893 meters. Above 6,000 meters, the terrain transitions to loose volcanic rock, ice fields, and snowpack. There are no roads. There are no tracks. The cars navigated the surface through expedition planning, tire selection, and driving skill — Dumas and co-driver Fabian Lurquin sharing the summit attempt. At 6,734 meters, air density is approximately 47% of sea level values. A turbocharged flat-six engine in those conditions faces fuel injection calibration challenges, turbocharger lag behavior changes, and thermal load profiles that the car was never designed to encounter. Every mechanical system had to perform in an environment that doesn't appear in any Porsche engineering specification sheet. ## eFuels as the Engineering Argument Porsche has been investing in synthetic fuel development since 2021, when it partnered with HIF Global on a eFuels plant in Patagonia. The argument is straightforward: the world has 1.3 billion combustion engine vehicles that will not be electrified in any near-term scenario. Synthetic fuels made from captured CO2 and renewable hydrogen can decarbonize those vehicles without replacing them. Running eFuels at 6,734 meters under world-record conditions is not a publicity stunt. It's a proof of concept under the most demanding circumstances the brand could construct. If the fuel performs at Ojos del Salado, the material argument about its viability becomes harder to dismiss. ## The Museum Exhibition The Porsche Museum in Stuttgart — one of the best automobile museums in the world, architecturally significant and forensically detailed in its documentation of the brand's engineering history — is now hosting an exhibition on the Doris and Edith expedition. For a brand that has systematically documented its achievements since the 356, the museum exhibition is the final step in the institutional argument: this happened, it was significant, and this is what it took to do it. Doris reached 6,020 meters. Edith pushed to 6,734. Both cars returned under their own power. The engineering team that built them will have another set of data points for whatever they build next.