Triumph will reveal four new motorcycles for its 2027 portfolio on October 6, and one of them is expected to be the long-awaited Bonneville 400. The company has released a teaser video showing four bikes but has not officially named any of them. The smallest retro-styled silhouette, however, closely matches the Bonneville 400 prototypes that have been testing for months.
One of the motorcycles shows the familiar Bonneville ingredients: a round headlamp, long teardrop-shaped fuel tank, flat bench seat, substantial mudguards and a traditional rear section. Test bikes have also been seen with wire-spoke wheels, a peashooter-style exhaust, telescopic front forks and twin rear shock absorbers, making it much more classically styled than the Speed 400.
For the local market, the Bonneville 400 is expected to use Triumph’s 349cc liquid-cooled single-cylinder engine rather than the original 398cc unit. Triumph downsized its small-capacity range to stay within the lower tax bracket for motorcycles up to 350cc, while retaining the familiar 400 badging on several models.
This Is More Than A Speed 400 In Retro Clothes
Spy photographs suggest Triumph has made larger changes beneath the styling. The Bonneville test bike uses a revised chassis, a different swingarm and a redesigned rear subframe to support the flatter seat and twin-shock suspension. The Speed 400, by comparison, uses an upside-down front fork and a monoshock rear layout.
The India-spec engine tune is still unconfirmed. Earlier reports suggested output close to the lower-tuned Speed T4, while other estimates point to a stronger state of tune. What is clear is that the motorcycle will use a six-speed gearbox and is expected to be set up for stronger low- and mid-range response rather than chasing a high peak-power number.
A circular instrument console has appeared on development bikes, and recent reports suggest it could be a TFT unit with connected functions. Final production equipment, wheel type and tyre configuration will only be clear at the reveal.
Expect It Around Rs 2.3 Lakh To Rs 2.7 Lakh
Triumph has not announced a price, but current estimates place the Bonneville 400 roughly in the Rs 2.3 lakh to Rs 2.7 lakh ex-showroom range. That would put it above much of the Royal Enfield Classic 350 line-up and into the same broad consideration set as the Honda CB350, Jawa 350 and Harley-Davidson X440.
The Classic 350 is the obvious target because the Bonneville is the first small Triumph designed around a genuinely traditional roadster shape. The Speed 400 offers more modern styling, while the Scrambler 400 X and XC have an adventure focus. The Bonneville should appeal to riders who want the Triumph badge and liquid-cooled performance without giving up the long-tank, flat-seat proportions of an old-school roadster.
Local production by Bajaj gives Triumph room to keep the price well below its larger twin-cylinder Bonneville models. It also means the new bike can share engine, electronics and several components with an already established small-capacity family.
The Other Three Bikes Are Still Unconfirmed
The remaining silhouettes are widely expected to include a new Street Triple and updated Tiger 900 and Tiger 1200 models, but Triumph has not confirmed those names. The teaser only states that four new models for 2027 will be revealed on October 6.
That distinction matters because leaked shapes and test bikes can identify the likely direction without confirming final specifications. Triumph could also use the event to show global versions first and announce local launch dates separately.