The Bombardier Dash 8 Q400 (DHC8-400) is powered by two Pratt & Whitney PW150A engines making it the most powerful turboprop on the market today. This It features the Active Noise and Vibration Suppression (ANVS) system making it as quiet as some jets (hence the Q).
This aircraft was designed with cruise performance and low operational costs at its core, making it one of the best choices for a regional turboprop.