1. Ted is 2 years older than Bill.

Question

2. Ted is 5 centimeters taller than Bill.
3. Ted is 10 kilograms heavier than Bill.

(Are they all grammatical?)

4. Ted is 165 cm tall.
(How do we read '165 cm' here?
5. one hundred sixty-five centimeters
6. one sixty-five centimeters
7. one hundred and sixty-five centimeters)

Answer 1

1-3 -- yes, they're all fine.

4 is fine; and you'd read the number as in 5.