500 Grand Prix

1949 Triumph 500 Grand Prix Technical Analysis & Specification Breakdown

Positioned in Triumph's sport motorcycle lineup, the 1949 Triumph 500 Grand Prix utilizes a 498 cc (30.4 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 40 HP (29.2 kW) at 7,200 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 80.3 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the 500 Grand Prix measures 142 kg (313 lbs) dry, translating to a power-to-weight ratio of 0.28 HP/kg (3.55 kg per horsepower).

Within MotoLibrary's Triumph archive, this model family spans 4 indexed model years from 1947 to 1950, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.