TL;DR
The Triumph Bonneville 400 has been spotted testing in India, indicating a potential October 2026 launch with a 349cc engine for the Indian market.
The upcoming Triumph Bonneville 400 has been observed undergoing tests in India, hinting at its imminent market debut. This motorcycle draws design cues from the larger Bonneville T100, aiming for a classic roadster aesthetic. Spy images suggest the Bonneville 400 will utilize a distinct chassis, swingarm, and rear subframe, setting it apart from other models in Triumph's 400cc series.
For the Indian market, the Bonneville 400 is expected to be powered by a 349cc engine, while its international counterpart may feature a 398cc unit producing 31PS and 36Nm. The engine tuning is anticipated to be similar to that of the Speed T4. Although Triumph has not yet provided an official launch date, the consistent testing indicates that the motorcycle could arrive in India around October 2026, expanding Triumph's heritage-inspired lineup.
