What does Audi PA mean?
1 Answers
Audi PA refers to the wheelbase, which is a crucial parameter closely related to a vehicle's performance. The role of PA: The wheelbase determines the position of a car's center of gravity. Therefore, any change in the wheelbase necessitates a complete redesign of the overall layout, particularly the dimensions of the drivetrain and body sections, as well as readjustments to the parameters of springs and shock absorbers in the suspension system, and the dimensions of the steering trapezoidal linkage in the steering system. Additionally, changes in the wheelbase will affect the distribution of axle loads on the front and rear axles, requiring consideration of these factors' impact on the vehicle's braking performance, handling, and ride comfort. Consequently, the wheelbase parameter is always listed in a vehicle's technical specifications, underscoring its significant reference value. The impact of wheelbase on overall vehicle performance: Both excessively short and long wheelbases can affect a vehicle's overall performance. A shorter wheelbase results in a shorter car length, reduced mass, smaller minimum turning radius and longitudinal passing radius, and improved maneuverability. However, if the wheelbase is too short, the cabin length may be insufficient, and the rear overhang (the distance between the rear axle and the vehicle's rearmost point) may become too long, leading to increased longitudinal oscillation during driving and significant mass transfer during braking, acceleration, or uphill driving, thereby worsening handling and stability.
