Full torque was available from this low rpm to well past redline.

This is promising as it shows Yamaha has designed the engine to have more thrust at low rpm.

Neither engine is more powerful than previously, but the 2.0's performance at lower rpm has been strengthened and its rev range stretched to 7,500rpm.

When rpms get too great, a vehicle is usually shifted to a higher gear and a lower rpm for the motor.

The low working rpm of the engine means that it can turn a propeller at efficient speeds without the need for a reduction drive.

The Fit is a bit pricy for its class, sluggish at low rpm, and rather noisy in highway driving.

At low rpm and low gasflow velocities, this effect is reduced.

Although the T25 was a smaller turbo, it spooled faster at a lower rpm resulting in increased low end acceleration performance.

This results in a less efficient combustion stroke, especially at lower RPM.

Another reason is to improve fuel economy by driving at lower rpm if acceleration is not what is being sought.