Canadian GP: Which teams have brought engine upgrades?

Renault
With Red Bull making significant progress this season - claiming their second race win in Monaco - but also insisting they are lacking the engine power to consistently challenge title rivals Mercedes and Ferrari, Renault's scheduled upgrade for Canada is a major point of interest.

The engine components used so far
Hamilton: Mercedes on back foot

But while Renault are expecting more performance from their B-spec engine, Red Bull technical chief Adrian Newey is only anticipating a one per cent improvement - around a tenth of a second.

And Max Verstappen laughed off suggestions that the team could now get closer to Mercedes and Ferrari with their new engine, only predicting that Red Bull "will be a little bit closer".

Renault were cautious of giving Red Bull the upgrade through fear of unreliability, but it seems six cars, including both McLarens, will receive the new package.

But all eyes will be on Red Bull, who are facing big decisions this month - including whether to switch engine supply next year. The Renault engine's progress will certainly be monitored intently this weekend.

Mercedes
They're a team who usually flourish at power-hungry circuits, as shown by their three-race winning streak in Montreal, but Mercedes have had to delay the planned introduction of their second F1 2018 power unit.

Team boss Toto Wolff previously revealed that all six Mercedes-powered cars would receive the upgrade, but a "quality issue" means Mercedes as well as customers Force India and Williams will only receive their engine boost in France.

The Silver Arrows aren't at risk of engine penalties - both Lewis Hamilton and Valtteri Bottas are still on the PU elements they started the season with in Australia - but will their delayed upgrade open their door for their rivals this weekend?

That's what Lewis Hamilton is fearing.

"If the others are bringing upgrades and have got fresh engines, particularly how close we are, we won't be in position to fight for the victory," said the championship leader.

Ferrari
Are Ferrari going to be the main benefactors from Mercedes' delay? It's a definite possibility.

The Scuderia have already impressed at circuits with long straights this season and have brought a new upgrade this weekend.

Sebastian Vettel said it had "always been the plan" to bring the second engine to Canada, where overtaking should be rife with three DRS zones.

"This track is more power-sensitive so the engine can take a bigger role but let's see where we are," said the four-time world champion.

But will Vettel be the only Ferrari-powered driver with the new package? Haas and Sauber both took fresh engine components at the Monaco GP, while Kimi Raikkonen required an engine change in Spain and is already on his second ICE, turbocharger and MGU-H.

Honda
Just like Renault, it's a crunch Canadian GP for Honda as they look to convince Red Bull of their suitability for a 2019 partnership.

The Japanese firm are centring their upgrades around the internal combustion engine, with reports suggesting they are looking for a 27bhp boost for the Toro Rosso cars.

"We are introducing an updated PU for this event, fitting it to both cars," said Honda technical chief Toyoharu Tanabe.

"The updates are mainly to the ICE, focusing on improving performance. The Montreal circuit is known for its long straights, where over 60 per cent of the lap is spent at full throttle."

With both Renault and Honda bringing upgrades to Montreal, it gives Red Bull an opportunity to directly compare and asses the two suppliers.

A decision for 2019 is expected ahead of the Austrian GP at the end of the month, so this weekend will be key.

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