This is a tricky one for the Infiniti FX. On the one hand the Infiniti handles, steers and controls the movements of its body at high speeds with genuine dexterity; it is, by and large, an unusually accomplished vehicle in this respect. However, when it comes to both ride comfort and road noise the FX is disappointingly poor, and this is as a direct result of wearing such enormous, uncompromising rubber.
Which means you are left with something of a dilemma: do you bite the bullet, put style over substance and try to live with the lumpy ride and rumbling road noise generated by those good-looking wheels and tyres, or do you downgrade to smaller rubber and take a hit on the design front? Having tried the car on smaller rubber as well (offered on lesser trim grades), we’d be tempted to go for them.
On 20in wheels the FX still suffers from a somewhat lively ride compared with most of its opposition, but not to a point where it might put you off the car completely. Elsewhere, the FX is a remarkably decent thing to drive, considering its size and weight. The steering is clean and precise in its operation and, thanks to the four-wheel steering system, provides real accuracy to the front end during turn-in, without being overly aggressive. And the body control/handling is similarly excellent, with the all-wheel drive system providing traction in all conditions and in all gears on the road.
As an off-roader the FX is probably best described as a soft-roader. It is perfectly capable in muddy fields but ultimately lacks the hardware to follow a Discovery into more serious territory. And again those high-performance tyres would do it no favours in proper mud.