All pub of Sainz’s four seasons in F1 have been with Renault power, and then he drove to the French manufacturer’s own team at the end of 20 17 and each one 2018.
“I feel a step in the perfect direction,” said Sainz. “I think we are a bit behind the Ferrari and Mercedes engines, however it definitely feels like we’ve got something to struggle with now, finally.
“I have done four years from Formula 1, each of those four years was 10km/h down on all the straights.
“So finally, to be turning up to Melbourne and to be only 2/3km/h down maybe on the top teams, is just a very, very motivating scenario.
“They seem to have clear ideas on how to develop the engine throughout this season in order that gives some good vibes too.
“I would praise Renault because sense because it appears like they’ve completed the step that we were needing couple of decades ago.”
Sainz retired by the Australian GP early with a suspected MGU-K collapse.
Sainz’s was hopeful his fiery exit from the race proved to be a one off and said it failed to eliminate his post-qualifying positivity.
“I trust Renault, they’ve finished steps, so hopefully we can keep pushing,” he explained after the grand prix.