Generally, the length of a compact car ranges between 3800mm and 4300mm, width between 1600mm and 1800mm, and height between 1400mm and 1600mm: 1. Length: Length is the parameter that most significantly affects a car's purpose, functionality, and ease of use. Therefore, vehicle classes are typically categorized by length. A longer body means greater longitudinal usable space. 2. Width: Width primarily influences passenger space and maneuverability. For passenger cars, if the goal is to provide a spacious feel for three passengers seated side by side (mainly sufficient shoulder room), the width generally needs to reach 1.8 meters. 3. Height: Vehicle height directly impacts the center of gravity (handling) and interior space. Most passenger cars have a height below 1.5 meters, significantly lower than the natural seated height of a human, primarily to lower the vehicle's center of gravity and ensure stability during high-speed cornering to prevent rollovers. 4. Wheelbase: Once the vehicle length is determined, the wheelbase becomes the most critical factor affecting passenger space, as the majority of two-box and three-box cars position the seating area between the front and rear axles. A longer wheelbase increases the longitudinal space for passengers, directly benefiting legroom, which greatly impacts comfort. In terms of driving performance, a longer wheelbase enhances straight-line cruising stability but reduces steering agility and increases the turning radius. Therefore, a balance must be struck between stability and maneuverability.
