The Veyron features an 8.0-litre, quad-turbocharged, W16 cylinder engine, equivalent to two narrow-angle V8 engines.
Each cylinder has four valves for a total of 64, but the VR8 configuration of each bank allows two overhead camshafts to drive two banks of cylinders so only four camshafts are needed.
The engine is fed by four turbochargers and displaces 7,993 cubic centimetres (487.8 cu in), with a square 86 by 86 mm (3.39 by 3.39 in) bore and stroke.