There are no fewer than four suspension options on the Q5. All trims (apart from the SQ5) have comfort dynamic suspension as standard – this consists of steel springs and passive dampers. The S Sport suspension that's a no-cost option on S line trim is fundamentally the same, but a little stiffer.
We found both set-ups deliver a slightly firmer ride than we'd like along battered urban streets, although S Sport suspension exacerbates this slightly. Still, things smooth out nicely on faster A-roads and motorways, where the Q5 feels supple but controlled – this should please anyone who suffers from motion sickness.
If you're prepared to pay extra, there's an adaptive air suspension system that allows you to stiffen or soften the suspension at the touch of a button. As well as being able to adjust the softness of the ride, this set-up allows you to vary the ride height; for instance, you can raise the car to give extra ground clearance or lower it to make lifting items in and out of the boot easier. It is a pricey option but, with it, the Q5 patters calmly over crags in the road and gently floats over undulations, making it, quite simply, the best-riding car in the class. However, whichever version you opt for, try to stick to the smallest wheels possible if you want to maximise ride comfort.
The SQ5 rides on adaptive dampers as standard but you can pay extra for air suspension. This is different from the air suspension on the regular Q5 but still delivers a remarkably composed ride – even if you can't resist the optional 21in alloys.