Which configuration is known for having a compact design and often results in a higher RPM capability?

The overhead cam configuration is recognized for its compact design, which allows for a more streamlined engine layout. This compactness plays a significant role in enabling higher RPM capabilities. In engines with overhead cam designs, the camshaft is located above the cylinders, which can reduce the complexity of the valve train and lead to fewer moving parts. As a result, this configuration can achieve quicker valve opening and closing times, which are crucial for high RPM performance.

Moreover, the geometry of overhead cam designs permits more precise control over valve timing and lift, contributing to improved engine efficiency and responsiveness at elevated speeds. The arrangement typically allows for a better airflow into and out of the combustion chamber, promoting greater power output.

Other configurations, such as L-head and flat head designs, often feature additional components that can increase inertia and reduce the ability to achieve high RPMs effectively. While the overhead valve design does allow for good performance, the overhead cam specifically stands out for its advantages in achieving compactness and higher operational speeds.