This is no vxr, its a 2.8t elite looking at the wheels, that said the interior would suggest an sri trim but it's no vxr and as said above would be the 240bhp, they may have it chipped but that again is a bit of a story told many times. The police will buy a vxr or vrs ect and use them for traffic ect but this is simply a 2.8t any joe can buy and there are better examples out there.
All 'dangle berries'...
The Octavia Vrss they use are genuine Vrss...
Vauxhall take a base spec shell and fit whatever engine fleet managers request along with the biggest brakes, again if requested... Inthe case of the Vectra C that means base spec plus xenons, Gsi brakes on the 3.2, vxr ones on the 2.8 and Sri ones on the diesels... All fitted with 17" wheels to clear the brakes whilst keeping tyre costs down... Early ones get sri wheels, later ones the Elites shown.
The standard plod V6 special is the full fat version regardless of engine, so 3.2 is Gsi mechanicals, the 2.8 is predominantly the 280 VXR without the trimmings, and the 1.9 is the 150Cdti in Sri tune. The Vec C special also came with the option of either 2.2 petrol or 2.0 petrol turbo, but both are rare beasts. Someof the latest diesels have the full fat 3.0 v6 lump again with Vxr brakes...

Plod cars make excellent projects as they are a blank canvas, and when you consider the options available on the Vectra C/Signum, you can build your own car to a unique spec.