To add some data points to your point: (Padun was doing ~6W/kg for his time of 34:53)
Pantani top time was done at 6.73W/kg (number comes from chronoswatts, no clue on accuracy, just wanted to provide a ballpark number)
Think even lowballing 34' would already be eye dropping though, 32:50 is insanity :/
Col de Joux-Plane 2021:11,6 km@8,5%---34:53---average speed 19.95 km/h(Mark Padun) ---35:06---average sp...
www.climbing-records.com
Col de Joux-Plane
2021:11,6 km@8,5%---34:53---average speed 19.95 km/h(Mark Padun)
---35:06---average speed 19.83 km/h(Jack Haig)
---35:11---average speed 19.78 km/h(Thomas-Porte-Lutsenko-Lopez-I.Izagirre-Gaudu-O'Connor-Kelderman)
2016:11,6 km@8,5%---35:34---average speed 19.57 km/h(Joaquim Rodriguez)
---36:04---average speed 19.30 km/h(15 riders group)
---37:05---average speed 18.77 km/h(Nibali-I.Izagirre)
2012:11,6 km@8,5%---35:16---average speed 19.74 km/h(Nairo Quintana)
---35:35---average speed 19.56 km/h(Evans-Porte-Froome-Wiggins-Rogers-Van Den Broeck-Weening-Kiryienka-Zubeldia)
2006:11,6 km@8,5%---35:47---average speed 19.45 km/h(Carlos Sastre)
---36:39---average speed 18.99 km/h(Christophe Moreau)
---36:59---average speed 18.82 km/h(Damiano Cunego)
---37:00---average speed 18.81 km/h(Floyd Landis)
---37:33---average speed 18.54 km/h(Boogerd-F.Schleck-Pereiro-Zubeldia-Kloden)
2000:11,6 km@8,5%---34:12---average speed 20.35 km/h(Virenque-Heras)
---34:40---average speed 20.08 km/h(Jan Ullrich)
---35:15---average speed 19.74 km/h(Beloki-Herve-Escartin)
---36:24---average speed 19.12 km/h(Botero-Conti-Atienza-Armstrong-Moreau)
1997:11,6 km@8,5%---32:50---average speed 21.20 km/h(Marco Pantani)-RECORD
---33:45---average speed 20.62 km/h(Virenque-Ullrich)
---34:19---average speed 20.28 km/h(Escartin-Riis)