Renault introduced an upgraded power unit for the Barcelona in-season test on Tuesday in both its own car and customer Red Bull, with both drivers confirming it is a "step forward" on the previous spec.
The French manufacturer is hopeful of closing the gap to Ferrari and Mercedes with its latest developments and it's believed the new engine could be worth around three to four tenths of a second per lap, depending on the circuit.
Renault third driver Esteban Ocon believes the improvement they've made with the engine could surprise some.
"You will be surprised," he said after completing 105 laps. "It is really good. Really good. I can tell it will be quicker for sure."
Ricciardo is also confident of a step forward and is pushing for the engine to be introduced for the next round in Monaco, rather than current scheduled introduction in Canada.
"Yeah, I think so far we are pretty happy with how it is all looking," said the Australian. "We will see what they find tonight, but it was all pretty reliable and everything ran as smooth as it could I think."
When asked if there was a difference, he replied: "Yeah. I think so. The progress is definitely there.
"If we can get it [for Monaco], for sure we would love it. It will be a matter of time for now."
