Sebastian Vettel has refused to publicly compare Mercedes’ Formula 1 power unit to Ferrꦛari’s out of respect to the tw🍌o engine manufacturers.

The four-time world champion previously drove Renault and Ferrari’s power units during the turbocharged hybrid era but following his switch to the rebranded Aston Martin team for 2021, he has now had his first experience of Mercedes’ cꦅlass-leadi🃏ng engine.

Mercedes has won every single championship on offer since the curওrent generation of power units were introduced in 2014 but following his first time driving the German manufacturཧer’s engine, Vettel was keen not to disclose any detail.

Asked to describe how the Mercedes power unit compared to Ferrari’s, Vettel replied: “It’s obviously different but I’m not going to ♊compare, just out of respect to different manufacturers.

“It’s something that I’ve never done in the past ꦯand I won’t do now.”

After𝐆 turning in 51 laps on a productive first day of pre-season testing in Bahr♈ain on Friday, a gearbox issue restricted Vettel to just 10 laps on Saturday morning.

The German sai📖d he is eager to “make up lost ground” when he gets back in the car for the final time before the start of the season on Sunday afternoon, with Vettel still adapting to th𓃲e AMR21.

"The last 24 hours hav😼e certainly been very busy for myself, for everyone in the garage, for the whole team,” Vettel 💧said on Saturday afternoon.

“Unfortunately we didn't have a very productive morning [on Day 2], we had an is🌄sue with the gearbox we had to change and that cost a bit of time.

"Thatꦇ's what happened and unfortunately we didn't get a lot of laps in. So this morning was not of great use in terms🌊 of track time.

"Yesterday [Day 1] though was very inter𝔉esting. The car feels very promising but there's still a lot of things I need to get used to.

“The car is different to what I ran [last꧅ year] and it's a different power unit as well so everything feels a bit different and takes a little bit of getting used to."