"We can say that with Red Bull, a good team, and Max Verstappen, a very good driver who gives us very good feedback, they have powered our development and made it smoother to proceed."
Honda introduced three upgrades across the 2019 season, with the biggest step-up saved for the final update of the season, boding well for a 2020 season in which Verstappen has targeted a title tilt.
"During this season we started with the Spec 1, and the step to Spec 2 is minor," F1 technical director Toyoharu Tanabe told Motorsport. "Then we stepped up to Spec 3, a bigger step than Spec 1 to Spec 2. And then Spec 4 was bigger than Spec 2 to Spec 3.
"We are happy to introduce our PU as we promised with the team and drivers, it was almost the same step we could make during the season that we told the team.
"From the trackside point of view, as a technical director at the trackside, I'm so happy with that power unit progress."
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