"It was a bit like the first time I tested a GP3 car. The details come to you as you spend more time in the car. The GP2 is a lot more physically hard to drive and there is more technology to learn - there's a lot more detail with these bigger cars."
Evans ran 64 laps in the two Tuesday sessions but rain fell on the morning of the second day and was still drying during the afternoon run.
"We were competitive on the second day but there were lots of incidents. Both runs I had on new tyres were compromised by red flags. We were more competitive than the times indicate - and there is plenty more to come," said Evans.
The second official GP2 testing is at the Jerez circuit in the Andalucia region of southern Spain on November 22-23. Before then, Evans has been invited to drive the prototype of the new Dallara GP3 car during the next official GP3 testingin Portugal on November 6-7.