Sir Stirling Moss (former F1 driver) 
“For
a man to be that much ahead every time, every race, whatever the circuit,
whatever the conditions… he is just in a class of his own, as was (Juan
Manuel) Fangio really. As was (Ayrton) Senna. I didn’t have a problem with
what Sebastian did in Malaysia (defying team orders to pass his team mate).
“He’s a racer, what’s wrong with that? You’re either a racer or you’re a
driver and there’s a big bloody difference. Drivers are easy to find and
racers aren’t.”
—–
Nico Rosberg (Mercedes) 
“One
of the greats? I don’t know. I don’t want to compare him to one of the
greats at the moment. I see him as a competitor, as a great driver, who is
doing a fantastic job and deserves his results but also has a great team and
a great car. Full stop.
“For sure it would help his perception if he had – and nothing against
Mark (Webber) who is a fantastic driver and a great person – if he had a
Fernando calibre driver next to him.”
—–
Christian Horner (Red Bull team principal)
“Firstly,
I think it’s hugely disrespectful to Mark Webber to suggest that he isn’t a
hugely talented race driver. We know Mark is seriously quick. And that for
us puts into context Sebastian’s performance. The fact that Sebastian has
outqualified him at each of the grands prix this year and won eight grands
prix puts into context the kind of performance level that he is racing at.
“Secondly I think you’ve got to grab the best with what you’ve got. It’s
not Sebastian’s responsibility to say ‘I want to have a world champion team
mate next year’.”
—–
Nico Hulkenberg (Sauber) 
“I
think he is a great driver in a great car. And the combination makes them
unbeatable at the moment. You have to give him respect and credit because he
keeps delivering every weekend. He has the element of luck, which you need,
which Mark (Webber) maybe sometimes misses. But he puts it on pole, starts
well and keeps it out of trouble.
“I think if he had a Kimi next to him, or Fernando at Ferrari, and still
came out on top then it’s fair to say he would be regarded even more highly.”
—–
Jenson Button (McLaren) 
“He
is certainly one of the greatest in terms of achievements. He is going to be
a four-time world champion, which he should shout about. I think he does
things right. He celebrates in the right manner. He has been given a good
car to compete over the last four years but he has also done an amazing job.
“You cannot take anything away from him. He has achieved in four years
what most drivers could never dream of achieving. Back-to-back. That is
very, very difficult to do. Even Michael (Schumacher) found that difficult
to do. It is not like he is winning every race either. Throughout those four
years he has had a lot of good fights on his hands. There have been some
great races. So it has not been a walk in the park for him.
“This year I would say he has a car advantage but that is down to him as
well. He is directing the team in the right way. Is he the best driver on
the grid? That is a different question and I don’t think any of us knows the
answer. We’re all confident in our own abilities.
“Even though Sebastian has won four world championships and none of us
has, you never know in Formula One. It is a team and driver combination and
the Red Bull-Vettel has been the best over the last four years.”
—–
Lewis Hamilton (Mercedes)
“The
job we are paid to do is to win. And he does it. There is nothing you can
take away from him. It doesn’t matter what I say right now. He is a
three-time world champion, about to be a four-time world champion. And he
will probably win more championships in the future.
“Naturally, whoever you drive against, it either raises you or lowers you
in terms of your perception. Definitely this year there have been more
positive comments about Nico (Rosberg). That’s how it is.”
—–
Fernando Alonso (Ferrari)
“Sebastian
has been close to perfection, all these years and winning the championships.
It is true that he had an advantage in car performance all these years, so
we see how good he is later in his career because, at the moment, he is
better than anyone and he is winning all the championships.
“But we saw also Hamilton starting in his first year nearly winning the
championship, and in his second year winning the championship. But then he
didn’t win any more. Sometimes you have the car to do it, sometimes not. At
the moment Red Bull and Vettel are a very good combination and too good for
us.”
—–
Stefano Domenicali (Ferrari team principal)
“Sebastian
Vettel often reminds me of the good old times with Michael Schumacher here
with us at Ferrari.
“A lot of people say that the team and the car made the difference and
that was why he was so strong. This is absolutely true, but it is not
everything. Michael was always able to deliver the results, that was
crucial.
“Deservedly or not, Vettel is definitely doing exactly the same, so
congratulations Sebastian.”
—–
Murray Walker (ex-F1 commentator) 
“I
have never met anybody, with the possible exception of Michael Schumacher
and now Sebastian Vettel, who devoted themselves to every aspect of their
craft, the way Ayrton Senna did.
“When the tyres changed from Bridgestone to Pirelli, Vettel was the only
person who went to Pirelli in Italy to find out how they made the tyres,
where they made the tyres, what sort of tyres they were. That’s the sort of
thing that Senna did and maybe to a lesser extent Schumacher did.
“The three of them come from the same mould and they have the same
characteristics, but Vettel has something that neither of the other two had
and that’s a very well developed sense of humour. And my blood boils when I
hear people booing him; they should be shouting praises, clapping their
hands. He’s a very nice chap and certainly one of the most gigantically
talented drivers we’ve ever seen.”