If you’re looking for a new vehicle that prioritizes traction and stability, you’ve likely come across cars with 4-Wheel Drive (4WD or 4x4) or All-Wheel Drive (AWD) drivetrains. Both systems can engage all four wheels for improved power and handling, but it can be hard to identify the differences. We’ll look at how each system works and help you choose the right car for your needs.
What is 4WD?
4WD is a type of drivetrain that allows drivers to deliver identical levels of power to both wheel axles, making the vehicle stronger when needed. Driver input is key here, as 4WD does not turn on automatically. However, 4WD can significantly improve a vehicle’s performance–especially in off-road situations where some wheels may not have adequate traction.
It’s important to note that 4WD systems lock the front and rear wheels’ speeds together, which is an issue when turning since individual wheels need to move at different speeds. Activating 4WD while turning on a dry, hard surface can cause drivetrain binding, which can significantly compromise handling and damage the vehicle. Because of this, it’s strongly recommended that 4WD is not activated when driving on dry pavement. Instead, 4WD systems are best suited for snowy or icy pavement and off-road conditions, including driving over mud, dirt, and rocks.
Additionally, drivers should be aware that 4WD systems are usually larger and heavier than AWD, front-wheel drive (FWD), and rear-wheel drive (RWD) systems. As a result, vehicles with 4WD typically have poorer fuel economy than cars with other drivetrains, all else being equal.
What is AWD?
Like 4WD, AWD is a type of drivetrain that can dramatically improve a vehicle’s strength by actively powering all four wheels. However, while 4WD systems require driver input to send identical power to both axles, AWD systems continuously monitor road conditions and adjust individual torque levels accordingly. Modern systems may choose to only power the front or rear wheels under good road conditions for better fuel economy, but engage all four wheels as needed for better handling. Many systems can control the power for each wheel, offering an even greater degree of optimization compared to 4WD.
Since power is not locked between axles, AWD systems excel at on-road driving. Additionally, their precise control over power outputs allows for better control over unique situations, including light off-road driving. AWD systems also improve stability and traction, leading to better handling and acceleration. Ultimately, AWD systems are great for messy road conditions, making them ideal for the snow and ice that many Canadians face in winter.
Should I Choose a 4WD or AWD Vehicle?
Both 4WD and AWD systems have unique advantages, making each one better for different circumstances. Your ideal drivetrain will depend on your driving circumstances:
- Consider choosing a 4WD vehicle if: you primarily need extra power for off-roading, and do not want better performance or handling on dry pavement.
- Consider choosing an AWD vehicle if: you’re looking for a vehicle that dynamically adjusts each axle’s power based on road conditions to maximize handling and fuel economy and are primarily planning on driving on pavement or mild-moderate off-road conditions.