As far from JBS as possible !
PD140 engines gave fairly good mpg which was replaced with the PD170 but the PD170 was not a good engine and gave low mpg that made it not worth buying it really over a petrol car. VAG have replaced the PD engine with a common rail engine ( same as BMW ) which gives better mpg but BMW do definitely produce the best diesel engines on the market at the moment. There is a new twin turbo VAG diesel engine due to be released soon but there isn`t much info as to which makes and models will have that engine.
06 Audi 2.0 PD140 Sport TDI Quattro S-LINE.
Old engine 330 bhp @ flywheel 263 bhp @ wheel 490 lb torque.
Audidriver write up HERE
Now stripped and playing with an uprated Cryo treated engine fitted with bigger turbo,water/methanol,uprated injectors etc etc.Wanting 400 bhp and 500 lb torque.
Other car 500+ bhp MK4 Golf R32 turbo