What does the number 45 on the rear of an Audi car mean?

2 Answers
DiDante
07/29/25 11:53pm
Audi's rear numbers 35/40/45 indicate the horsepower of the engine. Generally, 35 on the rear of an Audi represents a 1.4T engine, 40 represents a low-power 2.0T engine, 45 represents a high-power 2.0T engine, and 55 represents a 3.0T engine. These numbers represent the G-value, reflecting the car's acceleration. The higher the value, the greater the horsepower and the better the performance. Audi, a German luxury car brand, is symbolized by four interlocking rings. It is now a subsidiary of Volkswagen Group, headquartered in Ingolstadt, Germany, and has branches in many countries, including China. Audi is a renowned car developer and manufacturer, symbolized by four interlocking rings. Currently a subsidiary of Volkswagen Group, headquartered in Ingolstadt, Germany, its main models include A1, A3, A4, A5, A6, A7, A8, Q1, Q2, Q3, Q5, Q7, Q8, TT, R8, and the S and RS performance series.
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DeFaith
08/16/25 3:24am
I have been researching Audi cars for many years and often see the number 45 on the rear of the vehicles. It doesn't represent the actual displacement but rather the power level. Audi now uses this numerical naming system to simplify identification. For example, 45 TFSI indicates around 300 horsepower, representing a relatively powerful engine performance. From the early 1990s when actual displacement was used to the current digital representation of power, this makes it easier for consumers to distinguish between different versions of the models. When driving, you'll notice that the 45 models have quick acceleration response and make overtaking on highways effortless, though fuel consumption may be slightly higher. It's advisable to compare other numbers in the same series, such as 30 or 55, before purchasing to match your driving habits. Regular maintenance is crucial for maintaining stable power output and prolonging the vehicle's lifespan.
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