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The torque curve for a well tuned turbo engine will be much different than a non-turbo. The older Honda 4 cylinder engines were much more fun to drive with a manual transmission because they needed rpm to get up into the right torque/horsepower range. My Honda spent a lot of time in the 4500-5500 rpm range. However, BMW is using turbo 4 engines like the N20, and were able to achieve a torque curve that hits its high point at only about 1500-1800 RPM, and then stays nearly flat all the way to redline. Low rpm torque makes the engine feel more powerful because most drivers spend a lot of time in that rpm range.
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