Why do cars with the same displacement have different power?

The displacement of automobile engine represents the power level to a certain extent, but it does not mean that the same displacement means the same power. The main reasons are as follows:

1, structure

Some engines with the same displacement are naturally aspirated, some are turbocharged and some are mechanically turbocharged! For example, for a 2.0 engine, the power of Honda 2.0 is 108KW, and that of Audi 2.0tsi can reach 132KW.

2. Training is different

Engines with the same displacement and structure may also produce different power because of the deliberate training of manufacturers. Audi A4, for example, has two 2.0TSI engines with the same displacement and turbocharging, one is 132KW and the other is 155KW.

3. The application of technology is different.

At present, engine technology emerges one after another, but due to the differences in cost, technical secrecy and application scope, the power of the same displacement engine in different car manufacturers is also different.

Current regular valve system, in-cylinder direct injection system, stratified combustion technology, etc. , affect the output power and torque of the engine.

4. Special engines

For example, F 1 racing car, the power of a 2.0 engine is equivalent to the power of four ordinary civil 2.0 engines! ! ! It's amazing! ! ! This can't be explained in general!