Upcoming Triumph Bonneville 400 seen testing

The highly anticipated Triumph Bonneville 400 has been spotted again during near-production-ready road testing in India. This “Baby Bonnie” is designed to be a direct competitor to the dominant Royal Enfield Classic 350.

Design and Road Presence

The new Bonneville 400 is designed with pure retro-classic styling, distinct from the more modern Speed 400. Key design elements include:

– **Larger Proportions:** A significantly bigger and more muscular look than the Speed 400, with a chunkier teardrop fuel tank, longer side panels, and deep, rounded mudguards.

– **Classic Cycle Parts:** It features conventional telescopic front forks with gaiters, twin rear shock absorbers, and wire-spoke wheels, breaking away from the modern upside-down forks and alloys of other Triumph 400 models.

– **Signature Details:** A flat bench-style seat, a single peashooter exhaust, and a round LED headlamp complete the timeless British twin-style profile.

Powertrain and Variants

The Bonneville 400 will be powered by a 349cc, liquid-cooled, single-cylinder engine from the Triumph 400 family.

– **Engine Tune:** The engine is expected to use the more relaxed, high-torque tune from the Triumph Speed T4, producing around **29 bhp** and **31 Nm** of torque. This contrasts with the sportier tune of the Speed 400 and is designed for a laid-back riding character.

– **Dual Variants:** Triumph is likely to offer multiple variants, including a “Chrome Classic” version with traditional chrome detailing and a stealthy “Black” version with a fully blacked-out treatment on engine and exhaust components.

Launch Timeline and Expected Price

The Triumph Bonneville 400 is slated to make its official debut around **September 2026**, just ahead of the Indian festive season. The bike is expected to be priced competitively near or slightly below the **₹2 lakh** (ex-showroom) mark to rival the Royal Enfield Classic 350 directly.