The overall dimensions of QL 550 armored vehicle are determined to be 5.2 meters long, 2.25 meters wide and 1.86 meters high, which is greatly reduced compared with the overall dimensions of 6× armored vehicle. In terms of parts selection, domestic six-cylinder supercharged water-cooled engine is selected, which is about 600kg lower than 6x6 armored vehicle. The transmission has also been reduced by 230 kg, and the weight of each newly developed light drive axle and wheel side reducer is much lower than that of 6×6 armored vehicles.

Due to the reduction of vehicle size and the lightweight of main components, the total combat weight of QL 550 armored vehicle is controlled below 7 tons. Its maximum highway speed exceeds 120km/h, which is 35km/h higher than that of 6×6 armored vehicles, and its average fuel consumption is also lower than that of 6×6 armored vehicles. The steering radius of QL 550 armored vehicle is 7 meters, 2.5 meters smaller than that of 6×6 armored vehicle, which fully embodies the characteristics of "light, fast and agile".