Grainger Advantage

"This converted Hampton saloon has surprisingly good handling and sports an Italian V12 engine. A good all rounder."

The Grainger Advantage appears to be based entirely on the Rolls-Royce Phantom.

An armoured variant called the Grainger Avenger also exists.

Trivia
Despite the manufacturer being called "Grainger" in-game, the Pursuit Force website refers to the manufacturer as "Hampton" in its PDA section. This is the case with other vehicle manufacturers in the Pursuit Force universe as well, or in some cases the individual vehicle's name.