Difference between 406 engine and 405 engine.

The engine families 406 and 405 are the real pride of ZMZ (Zavolzhsky Motor Plant), the main supplier of the engine for the models of the Gorky Automobile Plant. Both engines have many similarities and differences that every car enthusiast needs to know, despite the fact that one engine has replaced the other. Moreover, the strong differences between the two motors just relate to the technical component, which is especially important.

Engine 406

The 406 engine entered serial production in 1997 (prior to that, prototypes were produced for five years). It was a gasoline-fueled internal combustion automobile engine. An essential detail - the engineers of ZMZ used fuel injection for the first time. For a long time, this engine was widely popular on many GAZ models, including the famous Volga (3110). The main advantage of the engine was its high reliability and efficiency. But there were also drawbacks: problems with the cooling system were quite common. Time passed, and the representatives of ZMZ understood perfectly well that the 406 engine needed improvement in terms of the technical component, and on its basis a new engine was developed - 405 (injector).

Engine 406

Engine 405

Four-cylinder injection engine 405 has become a full replacement for the above model. He was born in 2000 on a GAZ-3111 car. Subsequently, it was the cars of the Gorky Automobile Plant that became constant consumers of the 405 engine. This engine was constantly being improved: for example, the MZ-40522.10 engine was almost five percent more powerful than the base model, and the volume increased by almost eight. Thus, the rated power of the motor reached 150 horsepower. The 405 engine is used not only on GAZ passenger cars, but also on minibuses.

Comparison

Already from the definition it was possible to conclude that the main difference is that 406 is a carburetor, and 405 is an injector. Nevertheless, even without this, you can count quite a lot of differences between the two ZMZ engines.

Main Differences

  • The 405 engine was developed later, and its main task was to replace the outdated 406 engine. In other words, the 405 is a more modern and high-quality model.
  • The displacement of the 406 engine is 2.28 liters, while that of the 405 is 2.46.
  • Both engines have the same rpm - 5200. But the power of the ZMS-405 family is more powerful - 111.8 kW, more than 150 horsepower. For comparison, the 406 engine is 106.6 kW and 145 horsepower.
  • Thanks to the 405 injector, the model has less fuel consumption, plus the engine starts much easier. Actually, this is the main advantage of this ZMZ family, thanks to which almost all GAZ cars choose them.
  • 406 engine has its advantages: for example, the carburetor is more reliable and less likely to break. Not to say that the ZMZ-405 family is distinguished by reduced reliability, but the fact that the 406 engine breaks less often is a fact.

Conclusions TheDifference.ru

  1. 406 engine - carburetor, 405 - injector.
  2. The 405 engine was intended to replace the 406 because of the need for a more modern version of the engine.
  3. Engines have different displacement: 405 - 2.46 liters, 406 - 2.28.
  4. Despite the same number of revolutions per minute, the power of the 405 engine is higher - 150 horsepower versus 145.
  5. The 405 engine has lower fuel consumption and is easier to start.
  6. 406 engine is more reliable, it breaks less often.
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