Identifying an E46 320d variant

[Codefaster]

Hi folks,

I'm looking at buying an E46 320d Tourer as a sensible replacement to my modified Monaro (now sold ::sob:. I'm looking at a 2001 car in particular, pre-facelift by the looks of it. Is there any way to tell for sure whether it has the 136bhp or 150bhp engine when I view the car? Or did the power-hike just go along with the facelift?

Thanks for any help with this.

[Codefaster]

Thanks for the replies guys. I may end up buying a pre-facelift model anyway (just because there's a particularly nice lower-mileage one advertised privately near me), but it's good to know what to look out for.