What is the maximum speed of the Hummer?

250 km/h.What is the maximum speed of the Hummer?That would depend on which hummer you are talking about. If you are talking about the original hummer, its top speed is well under 100mph. Probably in the mid 80's. GM doesn't even advertise a top speed on the vehicle specs. It's top speed is severely limited by the gear ratio it has. Great for offroad but bad for the freeway. If you did manage to get a hummer moving that fast you'd be able to watch the gas gauge drop.