25.
It’s been speculated over the years that the Presidential State Car operates with a diesel-powered Duramax 6.6-litre turbo V8 engine. Make no mistake, that’s a powerful engine right there. But given the immense weight (14,000 pounds) the Presidential vehicle has a maximum speed of 60 mph. Imagine the amount of momentum a 14,000-pound beast traveling at 60 miles per hour has. Crazy.