What is Audi A8's available engine size options?

I am looking to purchase an Audi A8 and I am slightly confused about the available engine sizes. Can someone please provide a breakdown of the different options?

The Audi A8 offers three engine options: a 3.0L V6, a 4.0L V8, and a 6.0L W12. Each engine comes with different levels of power and performance. The 3.0L V6 is the standard engine, offering 335 horsepower and 369 lb-ft of torque. The 4.0L V8 is a more powerful option, producing 453 horsepower and 488 lb-ft of torque. Lastly, the 6.0L W12 is the most powerful engine, delivering 563 horsepower and 590 lb-ft of torque.

The engine size of the Audi A8 depends on the trim level you choose. The 3.0L V6 is available in the base and mid-level trims, while the 4.0L V8 is only offered in the top-level trim. The 6.0L W12 is the exclusive engine option for the Audi A8L, the long-wheelbase version of the A8.