It's kind of an apples and oranges comparison for either, if designed properly. Often, when a company takes an existing NA engine, and puts a turbo on it, they beef it up along the way. Lower compression pistons - that might be a anodized and use plasma Keystone rings, bigger piston pins, piston-skirt oil cooling, stronger rods, bigger cooling system, etc. If done right, one can last just as long a the other. Turbo version does more work and is built to endure it. In fact, sometimes the turbo versions last longer because they don't suffer from being overheated and overfueled, and lugged, resulting in cracked heads. That is very common in some non-turbo automtotive diesels.
Now, is a NA cheaper? Well yeah, usually since it costs less to build. But many times a smaller turbo engine takes the place of a larger NA engine - so that cuts down somewhat on the price difference.
Less things to wrong? One less turbo on the NA, that's all (for many systems), and turbos can last a very long time.
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Today's Featured Article - Horsepower Defined - by Staff. Indicated Horsepower This represents the power developed in the enine cylinder as obtained from the pressure in the cylinders. This is pressure obtained from an indicator which shows cylinder pressures. Indicated horsepower does not represent the actual useful power delivered by the engine. Brake Horsepower This is the actual horse power delivered by the engine to the shaft. It is equal to the "indicated horsepower" less the friction of the engine. It is useful hor
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