I have in the last few days purchased 2nd hand 2.0TDI Black Edition from an Audi dealership that had advertised the vehicle as being the 170 BHP version. When attempting to insure the vehicle I unexpectedly discovered that the car was in fact the 140BHP model! I have since spoken to the dealership about it who accept that a mistake has been made, have been extremely apologetic, and are doing their utmost to remedy the situation. I have been given various options to think about including chipping the current vehicle to achieve 170 BHP. Visually, the 2010 Black Edition 2.0 TDIs 140 and 170 BHP versions are indistinguishable from each other (this includes the exhaust pipes). What I would like to know is whether the internal engine components differ between the two models to generate the additional BHP, or is it just down to the chip?