Not even pantani did 7.4 w/kg.Doubtful. During racing peak Pogacar can produce about 6.5-6.6 w/kg for 20 minutes, which results in about 1850 m/h of VAM on moderately steep climbs (8%). This climbing speed is among highest achieved in modern cycling for regular non-murito climbs. Contador's best climb (Verbier) was even a bit faster than that but 6.6-6.7 w/kg is a more realistic estimate of his 20-minute peak performance. Hypothetically (in a 20-minute standalone uphill TT) they could produce a bit more but 7.4 w/kg looks alien.