BKZ is a 4.0 litre
280 horsepower common-rail V8, as far as I can tell. It is more likely that you have BKD, which is a 2.0 litre 140 horsepower PD diesel.
Almost all the TDI's are PD apart from the earliest ones, the TDI 90 and 110.
One way to tell is to look for the injectors in the cylinder head. If you can see them, fed by metal tubes from the injection pump, then you have a non-PD engine. If you can't see any injectors, and the fuel lines go to a pump at one end of the cylinder head, they you've got a PD engine, where the injectors are inside the rocker cover.
Both types have glow plugs which are also external. They might look a bit like injectors, but only have wiring connected to them.