Sebastian Vettel's championship bid will receive a power boost this weekend after Ferrari brought an upgraded engine to the British GP.

The Scuderia have introduced their third engine of the season at Silverstone as they chase their first victory at the power-hungry circuit since 2011.

"We'll fit a new engine and I don't think it will be a big difference, but obviously we have some things planned," Vettel told reporters on Thursday.

"It was the plan to have the new engine here, so we're on plan."

Vettel holds a 20-point lead over Lewis Hamilton in the Drivers' Championship going into the weekend, but has only won the British GP once in his career - in 2009 with Red Bull.

The FIA will confirm on Friday morning what areas of the power unit Ferrari have upgraded for Silverstone.

Four-time F1 world champion Sebastian Vettel races around London in the 2015 Ferrari Four-time F1 world champion Sebastian Vettel races around London in the 2015 Ferrari

Although Vettel had used only two main engines in the season's opening nine rounds, he has unlocked four turbochargers - meaning he is almost certain to take a potentially costly grid penalty when a fifth is inevitably used later in the year.

By contrast, closest rival Hamilton has only used two of each component so far this year.

Vettel wants improved qualifying

Vettel has extended his championship lead over the past two races, but has also received a renewed title challenge from Mercedes' Valtteri Bottas, who is now just 35 points behind the four-time world champion following his win in Austria last weekend.

But Vettel claims he is not concerned about the championship standing at this stage, instead focusing on Ferrari's competitiveness and where they can still improve.

"Valtteri has reason to believe. But I'm not too worried about points at this stage. It's only nine races, there is still a lot to come," Vettel said.

"The good news for us is that the car is working everywhere we go, we are competitive, especially in the race. We know we have to work on our qualifying performance to enhance our chances in the race.

"I think the most important thing for us is that there are more strengths than weaknesses.

"I want to win. If you look in Austria I wasn't happy that I finished second, I really wanted to win. If you can't win then you'll take second and if not second then third and so on. You have to fight for it. The most important thing is that we were always there and, not just in terms of results, but on pace the car is good."

German Vettel received a warm reception at Wednesday's F1 London Live event and there has been a lot of intrigue over the reception he will receive at Silverstone given his title battle with home favourite Hamilton.

"It is a fair crowd. It is a crowd that appreciates if you have done a good job. I don't see it as a fight or whatever," he added. "For us it's great to be at the front fighting for positions. The more support we get the better it is.

"The bigger motivation for me to win here is that Silvertsone is the home of racing, there is a lot of history at this grand prix and a lot of history of racing in this country.

"If you win you get a trophy for a couple of seconds before they take it away from you again. It's been a long time since I had that trophy in my hand and I want to have it again. It's very special, you can read out all the names of the drivers that can win here and that is the bigger motivation rather than it can hurt Lewis or Mercedes."

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