What does the 45tfsi at the back of an Audi mean?

[DelAlaina]

TFSI stands for FSI engine with turbocharging (T), abbreviated as TFSI. The number 45 represents the vehicle's acceleration, with a higher number indicating stronger power. TFSI denotes a turbocharged engine that supports fuel stratified combustion technology. Here is some information about Audi: 1. Audi's models are generally categorized into 35TFSI, 40TFSI, 45TFSI, and 55TFSI, representing 1.4T, 2.0T low power, 2.0T high power, and 3.0T V6 engines, respectively. This unconventional displacement labeling method is not unique to Audi but is also found in renowned manufacturers like Honda, Volkswagen, and Mercedes-Benz. Among them, Honda and Volkswagen differentiate displacement based on the vehicle's maximum torque. 2. This engine is equipped with AVS variable valve lift technology and hybrid injection technology. The hybrid injection technology includes both direct fuel injection and multi-point electronic fuel injection. This allows the engine to select different injection methods under varying operating conditions, thereby improving efficiency and power.