The V12 engine used in many Rolls-Royce models is known as the **Rolls-Royce 6.75-litre V12 engine**. This engine, often referred to as the **6.75L V12**, is renowned for its smooth and powerful performance, providing the hallmark of Rolls-Royce's luxury driving experience. This engine has been a key component in several models, including the Phantom and the Ghost.