Terrier 150

1955 Triumph Terrier 150 Technical Analysis & Specification Breakdown

At the heart of the 1955 Triumph Terrier 150 sport motorcycle, Triumph utilizes a 150 cc (9.2 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 8.3 HP (6.1 kW) at 6,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 55.3 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

Within MotoLibrary's Triumph archive, this model family spans 4 indexed model years from 1953 to 1956, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.