The Spaniard, who is returning to F1 next season, had caused some controversy by being allowed to run at the test in spite of his vast experience.
Both he and Renault were eager to get the day’s running under their belt though, as it was the only opportunity the double world champion had to run the 2020 car outside of a filming day he did at Barcelona earlier in the year.
During a qualifying simulation run towards the end of the day, Alonso put in a lap of 1m36.333 seconds – which was faster than both Renault duo Esteban Ocon and Daniel Ricciardo produced in qualifying last weekend.
Mercedes duo Nyck de Vries and Stoffel Vandoorne ended up second and third fastest for Mercedes, with Alfa Romeo’s Robert Kubica fourth overall.
F2 rookie of the year Yuki Tsunoda, who is tipped to land an F1 seat at AlphaTauri next season as teammate to Pierre Gasly, completed 122 laps as he got up to speed in the team’s current car and ended up fifth on the timesheets.
Red Bull youngster Juri Vips was sixth quickest, while his teammate Sebastian Buemi lost valuable running time after a crash early on.
The Swiss driver put his RB16 backwards into the barrier, damaging the rear wing and other components. He eventually ended up 12th overall.
F2 race winner Callum Ilott completed a solid day for Alfa Romeo to end up eighth quickest, just behind Ferrari development driver Antonio Fuoco.
The other Ferrari was being driven by Robert Shwartzman, who was getting his first run in a contemporary F1 car.
Mick Schumacher, who ran in Friday free practice in Abu Dhabi for Haas, completed another day of running for the team ahead of his F1 debut in 2021.
The German ended up slowest overall but completed more than 125 laps.
The Abu Dhabi young driver test was the final day of 2020 F1 action for the year, with cars now not allowed to run until pre-season testing begins next March in Barcelona.
|2||Nyck de Vries||Mercedes||1m36.595s||+0.262s||110|
|4||Robert Kubica||Alfa Romeo||1m37.446s||+1.113s||89|
|6||Juri Vips||Red Bull||1m37.770s||+1.437s||100|
|8||Callum Ilott||Alfa Romeo||1m37.826s||+1.493s||93|
|12||Sebastien Buemi||Red Bull||1m38.284s||+1.951s||76|