dt engine difference info please!!

[pugman]

hey experts! im planning to buy or px my car for a td 306 soon,
im looking out for a nice tuned one with between 120-150bhp

but id like to know the main differences between say an early td and a post 2000 one,
ie. are the modern ones really a 2.0 as opposed to a 1.9?
what is this talk about different fuel pumps?
do you need a bosch on a tuned pug?

anything else i should know?
what 306 would you guys reccommend? a post 2000 hdi i guess?

thanks peeps!
luke