The turning diameter of a vehicle is the minimum diameter of available space required for that vehicle to make a circular turn. The term thus refers to a theoretical minimal circle in which for example an aeroplane, a ground vehicle or a watercraft can be turned around.

What is a good turning diameter?

A turning radius of 34′-35′ | 10.4-10.7 m is common for passenger cars today.

Is smaller turning radius better?

Cars with a small turning radius are easier to maneuver than larger vehicles. This is especially true when driving in tight spaces, such as in a city. With a smaller radius, parking is easier as well as driving in hard-to-reach places such as off-roading.