The Spaniard set the fastest lap of FP2 just before the Albert Park Circuit began to rain, outpacing Ferrari's Charles Leclerc by 0.445 seconds with a time of 1m 18.887s.
After 20 minutes of FP2, Alonso had the fastest lap with a time of 1 minute, 18.887 seconds. Verstappen was in third place, 0.615 seconds behind Alonso and Leclerc.
After finishing fourth overall in qualifying race 2, Akhil's journey at the Imola circuit got off to a good start.
Aramco will work with Aston Martin to help the team meet Formula One's target of cars powered entirely by sustainable fuels by 2025.
Vettel blamed F1's technical rules and race calendar for not being as fast and innovative in many social and environmental issues.
Krack will be tasked with propelling Aston Martin to the front of the grid following an underwhelming first campaign back on the F1 grid.
This year, Formula 1 will introduce new technical regulations aimed at promoting closer and more interesting racing atmosphere.
Sebastian Vettel's tenure at Aston Martin got off to a shaky start, with reliability issues hampering his running in pre-season testing and a disastrous first race.
Aston Martin, by their own admission, was negatively impacted by this year's changes to the aerodynamic regulations.
The venue that also plays host to the Belgian GP will host the fourth round of the European GT4 Championships this coming weekend.