choosing new car

Hello, I would like to know if there is a big difference between the BWM X3 20d and the BMW X3 18d. I currently drive a BMW 520d and am thinking of changing to the X3 next year, but am worried if I pick the 18d I may find it underpowered.

What do you think? Thanks.

I am changing car; I have a BMW 318 at present but the new one is quite pricey! I have test driven the BMW 1 Series, an Audi A3, Volkswagen Golf Highline and a Mazda3. Whilst they are all fine cars I found the Mazda very good value and an excellent drive. Can you comnent?

Brendan from Dublin

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