Start with what the Peugeot 4002 is: a 2-door with 6.0L PSA EP9 V12, built from 2003, in the decade of stability control, dual-clutch gearboxes and the first serious hybrids. What it meant takes a little longer. The shape is credited to Stefan Schulze.
Under the skin
The engine is 6.0L PSA EP9 V12. The layout matters: the engine sits behind the driver and ahead of the rear axle, which puts the mass in the middle of the car and is why mid-engined cars change direction the way they do. The wheelbase is 2706 mm. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
In context
The cars a buyer would have weighed it against include the Bentley Continental GT, the Mazda RX-8, the Mazda Mazda3. Nearby in the Peugeot catalogue sit the Peugeot Onyx and the Peugeot Pars.