Understanding the Departure Angle of a Car: A Key Off-Roading Metric

[Car Tech Knowledge/ XNmotors]

When considering a vehicle for off-roading or even for handling rough terrain, the term “departure angle” often comes up in discussions about a car’s capabilities. 

Understanding this term can help buyers make informed decisions, especially if they plan to take their vehicle beyond smooth city streets. Let’s break down what the departure angle is and why it matters.

Source: AI generated 

What is the Departure Angle?

The departure angle of a car refers to the maximum angle of a slope or obstacle that the rear end of the vehicle can clear without scraping or dragging on the ground. It is measured as the angle between the ground and a straight line drawn from the rear tire contact point to the lowest part of the rear bumper or undercarriage.

This measurement is especially important for off-road vehicles, as it determines how well a car can descend from steep inclines, climb over rocks, or navigate uneven terrain without damaging the rear end.

How is the Departure Angle Measured?

The departure angle is expressed in degrees, and it is calculated as follows:

 1. Identify the point where the rear tires touch the ground.

 2. Draw an imaginary line from this point to the lowest rear overhang of the vehicle.

 3. Measure the angle between this line and the ground.

A larger departure angle means the vehicle is less likely to scrape or sustain damage when leaving an incline or obstacle.

Factors Affecting the Departure Angle

Several factors influence a car’s departure angle, including:

 1. Rear Overhang Length: Vehicles with shorter rear overhangs—such as compact SUVs or purpose-built off-road vehicles—typically have better departure angles. Longer rear overhangs, common in sedans or trucks with extended cargo areas, reduce the angle.

 2. Ground Clearance: Higher ground clearance improves the departure angle by elevating the lowest point of the vehicle’s rear end.

 3. Vehicle Design: Features like rear-mounted spare tires or tow hitches can reduce the departure angle if they extend below the rear bumper.

Why is the Departure Angle Important?

For off-road enthusiasts, the departure angle is a critical metric. A poor departure angle can result in the vehicle’s rear end scraping against rocks, mud, or other obstacles. This can lead to damage to the bumper, exhaust system, or undercarriage.

Even for urban drivers, a good departure angle can be useful. For example, it can prevent scraping when navigating steep driveways, curbs, or speed bumps.

Departure Angle in Vehicle Comparison

When comparing vehicles, especially SUVs, crossovers, or trucks, it’s helpful to look at the departure angle in conjunction with other off-roading specs such as:

 • Approach Angle: The angle at the front of the vehicle.

 • Breakover Angle: The angle that determines clearance at the midpoint of the car.

Vehicles designed for off-roading, such as the Jeep Wrangler, Toyota Land Cruiser, or Ford Bronco, typically have higher departure angles compared to city-oriented SUVs like the Honda CR-V or Toyota RAV4.

Conclusion

The departure angle is a vital metric for anyone who plans to take their vehicle off-road or navigate challenging terrain. By understanding this term and considering it alongside other vehicle specs, you can choose a car that meets your needs and performs well in the environments you frequent. Whether you’re climbing mountains or just avoiding scrapes in a steep parking lot, knowing the departure angle helps you pick the right ride.

( Article / XNmotors Sarah )