19. Mercedes G63 AMG 6×6
The Mercedes G-Class is one of the longest-running models in the car world. First emerging in 1979 as a primarily military off-road SUV and truck, it is still on the market with the same basic design. So, how did AMG improve it?
They just attached a pickup truck bed and installed one more axle. This made it the fastest, most expensive and rarest 6X6 in the world. Under the hood is the 5.5-liter twin-turbo engine with 540 HP. It delivers power to all six wheels through a specially built automatic transmission unit.