Triumph Bonneville 400 Spied Testing - Classic 350 New Rival Incoming

For the first time ever, the Triumph Bonneville 400 has been spotted testing, and it is set to become the most affordable Bonneville in the lineup. It is expected to be powered by a 398cc engine producing 40 PS and 37.5 Nm of torque. However, if it comes to India, it could use a 350cc engine instead. The bike has been spotted internationally, and more details are mentioned below. In the meantime, do join our 91Wheels Whatsapp Channel to never miss out on the latest automotive updates.

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Triumph Bonneville 400

The test mule clearly showcases classic Bonneville design cues, staying true to Triumph's retro philosophy. It features a large teardrop-shaped fuel tank, chunky fenders, and a peashooter-style exhaust, all of which closely resemble the larger Bonnevilles. Triumph has also paid attention to finer details, such as the headlamp mounting bracket, neatly integrated bullet indicators, and clean front fender mounts, giving the motorcycle an authentic old-school appeal. Adding to this charm is a new single-pod instrument cluster and a small circular tail-light, both of which further enhance its retro character.

The test bike also appears to feature a revised subframe, likely designed to accommodate a flatter seat with white piping, while possibly hinting at a longer swingarm for improved stance and stability. Unlike its 400 cc siblings, it sticks to traditional hardware with telescopic front forks, twin rear shock absorbers, and spoke wheels, staying true to its retro roots.

For India, the motorcycle is expected to use a smaller 350cc liquid-cooled engine to benefit from lower taxation, while international versions will continue with the 398cc motor. Interestingly, Triumph may still market it as a "400" in India. If priced competitively, it has the potential to challenge the Royal Enfield Classic 350, though its real impact will depend on pricing and performance closer to launch.

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