How fast does a single engine plane?

The speed of a single-engine plane can vary significantly depending on the model and purpose. Typically, general aviation single-engine aircraft, like the Cessna 172, cruise at speeds between 120 to 140 knots (about 138 to 161 mph). Some high-performance single-engine planes, such as the Mooney M20V, can reach speeds of around 170 knots (about 196 mph). Overall, speeds can range from about 100 to over 200 knots based on the aircraft's design and engine power.