What does this expression mean: "superior to"?

[Marinka]

Test No. incompl/advan-84 "GMAT Verbal Quiz (7)", question 1

You can tell that this car has been very well made and is certainly ......... to the other makes in this garage.

(a) better
(b) clearer
(c) above
(d) superior

Test No. incompl/advan-84 "GMAT Verbal Quiz (7)", answer 1

You can tell that this car has been very well made and is certainly superior to the other makes in this garage.

Correct answer: (d) superior

Your answer was: incorrect
You can tell that this car has been very well made and is certainly better to the other makes in this garage.
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Why is "superior" the only one solution?

Marinka

[Alan]

This is the only one that is followed by TO.
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