From time to time, friends around me will ask Ah Guijun: "Should I choose a turbocharged engine or a naturally aspirated engine when buying a car?" "There are so many models on the market that I have no clue when choosing them. Today, A Guijun will explain the difference between turbocharged engine and naturally aspirated engine for friends.
Turbocharged engines and naturally aspirated engines have different intake methods. Natural aspirate is a form of using atmospheric pressure to feed air into the engine cylinder without going through any supercharger, and this use of atmospheric pressure is like we are "inhaling". Mainly represented by Japanese brands such as Mazda, Subaru and Nissan, and the displacement is mainly concentrated in 1.6L, 2.0L, there are also a few performance vehicles with a displacement of 3.6L. The well-known Fit, the Onxella with mazda's Blue Sky technology engine, or the Lexus LFA's carefully tuned 1LR-GUE engine at Yamaha.
The turbocharged engine uses the energy generated by the engine in the exhaust process to drive the turbine rotation, and the exhaust turbine is directly connected to the intake compressor, thus playing the effect of inlet pressure. Mainly led by Volkswagen, Audi, Buick and other German brands, the displacement is as small as 1.0T Cruze and Lingpai, as large as 6.5T Lamborghini Aventador.
From the perspective of technical reliability, AGuijun believes that the reliability of naturally aspirated engines is higher. Because the structure of the naturally aspirated engine is simpler, and the quality is stable under the accumulation of technology for a long time. Looking at the failure rate of the turbo engine, it will be larger, after all, the structure is complex, and more parts will naturally increase the failure rate a little.
In terms of service life and post-maintenance costs, naturally aspirated engines are relatively better. Although the production cost of naturally aspirated engines is lower, it is also much more convenient in the later maintenance and repair. Turbocharged engines are also more selective about the quality of oil selection, spark plugs, oils and other spare parts than naturally aspirated engines. Many people drive tens of thousands of kilometers and find that cars with naturally aspirated engines at the same price save thousands of dollars in car maintenance than turbocharged engines. AGuijun believes that this is still very important for family cars.
From the perspective of power, both have their own advantages. The naturally aspirated engine has a smoother and smoother power output due to its simple air intake method. And it feels more heeled than the turbo model, and the power response is better than that of the turbo model. However, the disadvantage is that there is not enough air intake in the low rotational range, and the fuel consumption will be higher.
Turbocharged engines gain a greater intake through exhaust gas turbines, which not only costs no fuel, but also improves the power performance of the engine. Ah Guijun mentioned by the way, not only people have high reactions, but cars also have high reactions. Turbocharged engines have less power attenuation than naturally aspirated engines in highland areas, so friends who are more concerned about power in highland areas can consider turbocharged engine models. However, at low revolutions, the exhaust volume is insufficient and the turbine cannot intervene. After the intervention, it will give people an incoherent power output, which is what the old driver often says about the throttle not heeling.
GuiyanTang:
In general, the power output of the naturally aspirated engine is smoother, and the post-maintenance is more worry-free. Friends who care more about power recommend choosing a turbocharged engine model. No one is perfect, no car is finished, each car has its own advantages and disadvantages, and finding your most satisfactory model is the best.
(Text/Fawn; Trial/Lingyun Sentient Beings)