Tell me the engine specifications of Bentley Flying Spur?

Bentley Flying Spur W12 offers 12-cylinders  6.0-litres engine, that puts out 616 bhp and a maximum torque of 800 Nm, while Bentley Flying Spur V8 offers 8-cylinders having cubic capacity of 4.0-litre, which produces 500 bhp power and torque 660 Nm.