The Napier Deltic is a unique type of diesel engine known for its distinctive design and high power output. Developed in the 1950s by Napier & Son, it features a two-stroke, opposed-piston configuration, which allows for a compact and lightweight engine. This design enables the Deltic to produce significant horsepower while maintaining efficiency, making it suitable for various applications, including marine and railway use. The Deltic engine gained fame in the British Railways for powering high-speed trains, particularly the Deltic locomotives. Its innovative engineering and performance capabilities have made it a notable example in the history of diesel engine development, influencing future designs in the industry.