Nissan SR20 with turbo system or SR20DET is one of the popular engines among car enthusiasts. The engine is popular because it is easy to upgrade and there are varieties of aftermarket product with reasonable price tag.
There are people who swapped their stock engine with Nissan SR20DET. It is the quickest way to get more horsepower from your car. If you have an old BMW or Mercedes, this engine is one of the best choice other than RB20 engine from the Skyline family.
But if the turbo induction system is too furious for you, there is also a normally aspirated engine for the SR20 engine. It has a code name SR20DE. But the following video shows the 4-cylinder SR20DET with the turbo system in action.