Buying a car to last me a couple of years and looking at a 3 series, due to miles I do I need a diesel

In my price range what would you go for,

330d on a 02/52 with 90k ish or
320d on a 54 plate with 60k

I know there is the power difference, but yo get newer and lower milage car with a 320d
What are the engines like