Bonneville

2005 Triumph Bonneville Technical Analysis & Specification Breakdown

At the heart of the 2005 Triumph Bonneville classic motorcycle, Triumph pairs a 790 cc (48.2 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 62 HP (45.3 kW) at 7,400 rpm while maximum torque reaches 62 Nm (45.7 lb-ft) at 3,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 78.5 HP per liter and a 3,900 rpm working window between peak torque (3,500 rpm) and peak power (7,400 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the Bonneville measures 205 kg (452 lbs) dry, translating to a power-to-weight ratio of 0.3 HP/kg (3.31 kg per horsepower). Rider ergonomics and chassis geometry center around a 775 mm (30.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,500 mm (59.1 in) wheelbase engineered for balanced agility and highway composure.

Within MotoLibrary's Triumph archive, this model family spans 19 indexed model years from 1986 to 2016, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.