These vehicles top out at about 55 after 1/4mi of flat road with your foot on the floor. This kind of performance is fine for a convoy but is a really un-fun time in modern traffic.

The torsional flexing that makes them want to keep tires planted for working on less than even terrain makes them handle like poo even compared to other vehicles on similar sized tires.

These things make humvees look good, not fast, but good.