What is the Difference Between Torsion Beam and Independent Suspension?
2 Answers
Torsion beam and independent suspension mainly have the following differences: 1. Different application ranges: The torsion beam-type non-independent suspension is not widely used in cars because this type of suspension is relatively rigid. Simply put, the torsion beam-type non-independent suspension connects the two rear wheels of the car on one axle; while independent suspension has a wider application range. 2. Different structures: The torsion beam suspension is also called non-independent suspension. The structural feature of the non-independent suspension system is that the wheels on both sides are connected by an integral frame, and the wheels together with the axle are suspended under the frame or body through an elastic suspension system. In contrast, independent suspension means that each wheel is individually suspended under the frame or body through an elastic suspension system.
The torsion beam suspension, simply put, connects the rear wheels with a crossbeam, causing them to move together. It feels decent on city roads, but the bumpiness becomes noticeable on rough surfaces, making the car feel bouncy. In contrast, independent suspension equips each wheel with its own set of springs and shock absorbers, isolating movements from one another. This significantly reduces vibrations when going over speed bumps or rural roads, offering a much more comfortable ride.
Cost-wise, the torsion beam is simpler and cheaper, commonly used in compact or economy cars, with lower maintenance expenses. Independent suspension is pricier, often found in luxury cars and SUVs, and provides better stability during turns and handling.
From a space perspective, the torsion beam takes up less room, allowing for a larger trunk, which is great for cargo. Independent suspension has more components, but optimized designs can mitigate space concerns.
For daily driving, the torsion beam is hassle-free, but if comfort is a priority, independent suspension is the way to go. I once switched to a car with independent suspension and noticed significantly less fatigue on long drives—that’s the biggest difference.