Triumph Bonneville 400 Launched at Rs 2.55 Lakh: Specs vs Classic 350, CB350, Speed 400

Triumph and Bajaj have finally put a proper Bonneville within reach of Indian buyers. The new Bonneville 400 family went on sale on 6 October 2026 at Rs 2,54,999 ex-showroom (Delhi) for the entry T4, and Rs 2,79,999 for the T40 and T40 Black. Despite the 400 badge, the engine is a 349cc single, which keeps it under the 350cc GST line.

Triumph Bonneville 400 price and variants

There are three versions. The T4 is the entry point at Rs 2,54,999, while the T40 and the blacked out T40 Black both cost Rs 2,79,999 (all ex-showroom, Delhi). Rushlane and BikeWale both list these as the launch prices and neither mentions an introductory period, so treat them as the current list prices. On-road in Delhi, BikeWale puts the T4 at roughly Rs 2.90 lakh.

Engine and specs: 349cc, not 398cc

The headline number causes confusion, so here it is plainly: the Bonneville 400 uses a 349cc liquid-cooled, single-cylinder DOHC engine, not the older 398cc unit. It makes 29 PS at 7,000 rpm and 31 Nm at 5,500 rpm, paired with a six-speed gearbox and an assist and slipper clutch. Triumph has done the same with the Speed 400, shortening the stroke to bring it to 349cc so it falls in the lower GST slab for bikes up to 350cc.

• Engine: 349cc, liquid-cooled single, 29 PS and 31 Nm
• Gearbox: 6-speed, assist and slipper clutch, ride-by-wire
• Kerb weight: 195 kg; fuel tank: 14 litres
• Seat height: 790 mm, with an optional 770 mm low seat
• Wheels: 18 inch front, 17 inch rear, wire spokes; 100/90 and 150/70 tyres
• Brakes: 310 mm front disc, 255 mm rear disc, ByBre callipers

The styling is pure Bonneville: rounded tank, flat bench seat, twin rear shocks, wire-spoke wheels and chrome or blacked out engine covers. Launch colourways listed include Aegean Blue with Fusion White and Fusion White with Phantom Black, with more shades on the T40 and an all black T40 Black.

Bookings and deliveries

If you want the bike for the coming riding season, the T40 is the one that arrives first. T4 buyers face a wait of about three months.

Bonneville 400 vs Classic 350, CB350 and Speed 400

Priced from Rs 2.55 lakh, the Bonneville sits clearly above the 350cc retro crowd and above its own sibling, the Speed 400. Here is how the numbers line up.

The Bonneville carries a premium of roughly Rs 66,000 over a base Classic 350, and it weighs exactly the same 195 kg. What that money buys is about 44 percent more power, a liquid-cooled engine, a slipper clutch and, on the T40, cornering ABS and cruise control. The Speed 400 is lighter and quicker for less, but it is a roadster, not a classic.

Who should buy it vs the Classic 350

Pick the Bonneville 400 if

• You want a genuine British classic badge with modern electronics
• You ride highways often and value the extra 9 PS and liquid cooling
• Cruise control and cornering ABS matter to you (T40)

Stick with the Classic 350 if

• Budget is the priority: it saves you about Rs 66,000 ex-showroom
• You want the familiar thump and the wider service network
• Most of your riding is relaxed city and touring pace

Make your new retro ride-ready

The T40's 4 inch round TFT and the T4's colour display are compact, period-correct units. If you want large maps and Apple CarPlay on the handlebar, a Motoplay 5 inch CarPlay screen is a tidy add-on. Keep a heavy duty helmet lock on the bike so your lid stays secure at cafe stops, and wear a pair of FANTOM riding gloves for grip and protection on longer rides.

Polished tanks and chrome covers show every speck of dust. A quick wipe with a DustMag duster before the ride, followed by a 1200 GSM microfiber towel after washing, keeps the paint swirl-free. If you also own an older commuter on a halogen H4 bulb, the NightHawk 40W H4 LED is an easy brightness upgrade.

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Prices are Autofy store prices as of 7 October 2026, inclusive of taxes, and may change. Motorcycle prices above are ex-showroom.

Key takeaways

• Bonneville 400 launched on 6 Oct 2026 at Rs 2,54,999 (T4) and Rs 2,79,999 (T40, T40 Black), ex-showroom Delhi
• Engine is 349cc, not 398cc: 29 PS, 31 Nm, 6-speed, slipper clutch
• Weighs 195 kg, same as the Classic 350
• Bookings opened 7 Oct; T40 deliveries from November, T4 from January 2027
• It costs about Rs 66,000 more than a base Classic 350

Frequently asked questions