At the heart of the 2026 Triumph Speed 400 motorcycle, Triumph features a 398.15 cc engine configuration. In factory specification, peak output is rated at 39.5 HP while maximum torque reaches 37.5 Nm, transferring power to the rear wheel through a 6 speed gearbox and x-ring chain final drive. With a specific output of 99.2 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Speed 400 measures 375 kg (827 lbs) wet (curb), translating to a power-to-weight ratio of 0.11 HP/kg (9.49 kg per horsepower). Rider ergonomics and chassis geometry center around a 31 mm (1.2 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 54 mm (2.1 in) wheelbase engineered for quick, flickable steering geometry. The 13-liter (3.4 US gal) fuel tank paired with a rated consumption of 3.5 L/100 km provides an estimated theoretical range of roughly 371 km (231 miles) between fill-ups.
Within MotoLibrary's Triumph archive, this model family spans 2 indexed model years from 2024 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
