When Steele and Darius are discussing the presidential chain of command, Steele says, "President, VP, Speaker of the House, Secretary of State..." as the chain of command to leave the Secretary of Defense as President. That skips President pro tempore of the Senate (after Speaker of the House) and Secretary of the Treasury (after Secretary of State) so it would require six leaders be assassinated, not "just" four.
Darius claims that the Cobra Concept attained a speed of 220 or 225mph when in actuality, Ford claims it is only able to reach a speed of 185mph with the electronic limiter removed. Otherwise, it would only reach 100mph.
In the final chase between the Cobra car and the train, the speed indicators are frequently desynchronized: when the car is at 240-260 mph on the road (about 10 meters behind), the train is trying to reach 190 mph. Due to the speed difference, the car should have overtake the train more than 10 times in this sequence.
During the tank chase on the aircraft carrier, the amount of flames on the back of the tank that Darius is driving changes during shots. The flames on the right rear go from a lot of flame, to none, back to a lot several times.
When Lola gives Darius the keys to the silver Cobra Concept, you can clearly see that there is no tattoo on the back of Darius's neck. But in the next scene in the car, as he is driving away the xxx tattoo is there.
When Darius is on the speed train and the gas is leaking from the broken hose, in a scuffle a lighter falls out of his pocket. The lid however, was closed when shown laying on the floor. Later when Darius grabs for it, it is then already open.
Near the end of the tank battle inside the aircraft carrier, Darius' tank has the back door blown open and two boxes can be seen rolling around on it. Darius stops his tank and runs out the back door, but the boxes aren't there even though they had been a second earlier.
There is no "West side" or "South side" to Washington, DC. The best parallel to the "South Side" as referred to in the movie would be Southeast Washington. And the best parallel to the "West Side" would be Georgetown.
The actors say the President's Bullet Train runs out of the city along I-95 to the north-northwest. I-95 does not go through Washington (rather around it), and it goes northeast from the city through Maryland or south-southwest from the city through Virginia.
When Zeke uses the main gun of the hijacked tank to blow a hole in the US Capitol Building so Darius and Steele can get inside, he is seen loading a sabot shell into the gun. This round is incapable of causing an explosion as seen in the film, or making a hole that size in the building.
During the chase of the bullet train, the operator of the train states that he cannot stop the train as he has no air pressure for the air brakes. In reality, air brakes work by supplying air to the brake pistons to keep the brake pads off of the rotor or away from the drum. When you apply the brakes, air pressure is removed from the system allowing spring pressure to force the pad to contact the rotor or drum. This is a fail-safe mode safety feature designed for an instance just like this. Thus, if the brakes lose air, the vehicle comes to a stop, and doesn't lose its ability to brake.
When the tank shoots a hole in the wall of the Capitol building, the hole is at the very base of the dome on the outside. This would put the hole up very high on the inside but instead it opens up on the floor of the Rotunda. It would actually be about 30 feet higher.
During the chase on board the aircraft carrier Stone manages to push the 'Abrams' tank that is after him to the side with his 'M2 Bradley'. The 'Bradley' is literally half the weight of the 'Abrams' and would be incapable of actually doing so.
General Pettibone's evening dress uniform is lined in red trim. In reality, red trim is only on the evening dress uniform of enlisted US Marines. As an officer, the General's evening dress uniform should have no trim, and should be all midnight blue.
When they were supposedly on the aircraft carrier "Independence" there was one shot showing the flight deck and island (tower); clearly visible is the number 12, which is actually the CVS 12 USS Hornet (now a museum); the Independence is CV 62 and is mothballed in Bremerton, WA.
On the aircraft carrier, Darius hooks up the tank to the
catapult and subsequently launches it off of the deck. Assuming the Bradley's tracks would not snag, this would be impossible. As the catapult would have to be powered up (it is steam powered), and there are several safeguards in place to keep a single individual from firing the cat. The catapult has to be set, it is not just "hot" all of the time, even if steam is available to other systems on the ship.
In the reception scene, we see lighted panels forming flags -- The Stars and Stripes (United States) between 2 Union Jacks (United Kingdom). The U.S. flag is backwards. The stars should be in the upper left corner when it's displayed against a wall.
The DVD packaging for the Region 1 disc offers a brief biography on Darius Stone as "a thrill-seeking troublemaker whose criminal record and extreme sports obsession make him the perfect candidate to be the newest xXx agent." Darius never once alludes to an interest in extreme sports the entire film, and all of his stunts actions are done are out of necessity, not for thrill-seeking. The biography seems to be written about the original xXx character Xander Cage, rather than Darius Stone.
The guard tower sniper at the prison is seen firing at Darius with an M40 bolt-action rifle during his escape on the helicopter, yet he is not seen operating the action and the sounds of the shots are too close together for this type of weapon.
When Darius makes the jump from the prison roof to the helicopter, he is seen in slow motion diving towards the skid. From this side shot, it is obvious that his arc will put him a couple of feet short of the skid. In the next shot, he is shown easily reaching the skid to grab on.
The goof items below may give away important plot points.
When Darius, Lola, and Shavers are watching the news report after Gen. Pettibone's murder, the bag of Bugles corn chips that Shavers is eating changes from one shot to the next. It turns from the red bag for original flavor, to the yellow-orange bag for the nacho cheese flavor.
When Darius jumps from the presidential bullet train on the bridge, he is in free fall for 41 seconds before hitting the water below. The bridge looks to be only a couple of hundred feet high. In reality, a human body in free fall would fall approximately 6000 feet in 41 seconds, assuming a stable skydivers body position. The distance fallen would be greater if falling in any other body position.