Quick post today.....
I estimated the power taken for Contador to do the climb to Nevegal, which took him 20:58 from the checkpoint at the base of the climb to the summit:
600 meters climbed in 7.30 km for an average grade of 8.2%.
For direct comparison with Horner's Sierra Road climb I used the same numbers: 65 kg body mass, 6.8 kg bike, 1.5 kg of other stuff, 0.32 m² CdA. I reduced rolling resistance from 3% to 2.5% since Contador was on time trial tires. I still assumed 3% drivetrain loss. I used a power-speed model including inertia. I assumed he started the climb at 40 kph.
The result: 6.24 W/kg. This is lower than the 6.56 W/kg I had for Horner on Sierra Rd. Horner's VAM was 1916 m/hr while Contador was 1750 m/hr.
Of course it's not a fair comparison as Contador had finished two brutally tough stages immediately preceding the rest week the day before, and may not have fully recovered. It seems riders aren't having rest days as productive as they had a few years ago.