Renault is aiming to debut its upgraded power unit at next weekend's Monaco Grand Prix.
The French manufacturer had originally planned to launch its heavily revised engine at the Canadian Grand Prix but a positive test at Barcelona has brought its debut forward.
This week Red Bull and Renault ran the power unit during the two-day in-season test with both teams reporting significant improvements compared to its previous iteration.
Renault technical director Remi Taffin declared the test a success with his team now working to ensure the units will be ready for Monaco.
“The current power unit used since Australia has had several smaller upgrades, and all the drivers were very happy with the standard in Spain,” said Taffin.
“In parallel, we've been working on the new spec since the start of the season, but needed to sign off all the parts for reliability and mileage before using on track.
“The tests were very positive and showed it to be more powerful and driveable.
“We had originally planned to use the new version in Canada when the current units are scheduled to be removed from the cycle.
“But if we can get the units together and completely validated by Monaco we will use the ones available at this race.”
While Monaco is not regarded as an engine circuit, Taffin says the development will offer a lap time improvement on the Monte Carlo streets.
“Monaco is the slowest circuit on the calendar so the demands on the car and power unit are very different to the previous event in Barcelona,” added Taffin.
“On the engine front we need to work on driveability in the lower rev range.
“It's not necessarily an ‘engine' circuit, but getting the right set-up and a chassis and engine that is really dialled together can pay dividends in the overall laptime.”