Hi Rovcra
I absolutely agree with what has bee said regarding the 4.2. With it you will enjoy 600K plus kms of pleasure filled hassle free wheeling.
I really do like the turbo version of this motor due to the fact that its a bit more punchy in its performace. A bit more along the lines of the 4.5 petrol, bar the fuel consumption.
The only reason I did'nt go for it at the time was because the seller made sure to clean every nook an crannie, which got me worried to begin with and on close inspection I noticed that one of the intercooler pipes were very wet with oil.

an absolute no no. As all things turbo, there's one way.. the right way. It might say TD on the back, but eish.. make sure sure.