What do Audi 40, 45, and 55 represent?
1 Answers
Audi's rear badges of 40/45/55 indicate the horsepower of the engine. The larger the number, the greater the horsepower and the better the performance. The numbers on the rear of an Audi represent the vehicle's acceleration value. Additional information is as follows: Acceleration value: Since 2012, Audi has been using acceleration values instead of displacement for rear badging. This is because, with the rise of new energy vehicles (such as hybrid and pure electric vehicles), it has become increasingly common for models with the same displacement to be tuned to different power outputs. The conversion formula is: 100000/3600/0-100 km/h acceleration time in seconds/9.8*100, rounded to the nearest whole number (ending with 0 or 5), which gives you the badge number seen on the rear. Audi divides the acceleration by G (i.e., multiples of G), multiplies by 100, rounds to the nearest whole number, and uses increments of 5 to arrive at the number preceding TFSI. The formula is 100000/3600/0-100 km/h acceleration time (seconds)/9.8x100 (rounded). Its characteristic is that a variable vortex is already generated in the intake tract, allowing the intake airflow to form an optimal vortex shape as it enters the combustion chamber, pushing in a stratified filling manner so that the mixed gas is concentrated around the spark plug located at the center of the combustion chamber. This enables the lean-burn technology to achieve a mixture ratio of over 25:1, which under normal circumstances would be impossible to ignite, thus requiring a stratified combustion approach from rich to lean.
