The Bonneville has been Triumph's most famous name since 1959, but until now the smallest one was the 900 cc T100. For 2027 comes the Bonneville T40, a 400 cc Bonneville designed for new riders and A2 license holders, along with its darker version, the T40 Black.
Triumph unveiled it in October 2026 and it will reach dealers in spring 2027. It keeps the 1960s style of its bigger sisters and adds equipment that is unusual on an entry-level bike.
A real Bonneville, only smaller
At first glance it is a Bonneville: teardrop tank with knee pads, round headlight, spoked wheels, twin rear shocks, aluminum engine covers and a long peashooter-style silencer. The tank carries the metal Triumph badge and hand-painted coach lines.
The T40 comes in two-tone color schemes inspired by classic Bonnevilles, such as Meriden Blue with Tangerine Orange or New England White with Jet Black. On the T40 Black, many parts are painted or finished in black.
398 cc TR Series engine
It uses the latest version of the liquid-cooled 398 cc TR Series single, the same engine family as the Speed 400 and Scrambler 400 X. For the Bonneville it has a revised cylinder head and its own tune, focused more on low and mid-range torque than on peak power.
It makes 32 hp at 7,000 rpm and 36 Nm at 5,000 rpm. It has ride-by-wire, an assist and slipper clutch and a six-speed gearbox. Triumph quotes 3.5 l/100 km, so the 14.5-liter tank is good for more than 400 km.
Big-bike equipment
- Five riding modes: Road, Rain and Eco, plus two you can set up yourself.
- Cornering ABS and traction control: both systems take lean angle into account.
- Standard cruise control, rare on a 400 cc bike.
- Round 4-inch TFT screen with Bluetooth: map navigation through the Triumph app, phone and music control.
- Full LED lighting, with the classic round headlight.
- USB-C socket and a center stand, very handy for chain care or storing it in the garage.
Easy for beginners
It weighs 191 kg wet, 37 kg less than the T100, and the seat is 790 mm off the ground. With the accessory low seat it drops to about 770 mm. The riding position is upright, with a wide 818 mm handlebar and a classic flat seat.
The frame is tubular steel, with a 43 mm fork and twin shocks adjustable for preload, both with 130 mm of travel. Braking comes from a 310 mm front disc and a 255 mm rear disc. The spoked wheels have aluminum rims, 18 and 17 inches, and use inner tubes.
Specifications
| Engine | TR Series single, liquid-cooled, DOHC, 4 valves |
|---|---|
| Displacement | 398 cc (89 × 64 mm) |
| Compression | 12:1 |
| Power | 32 hp (22.8 kW) at 7,000 rpm |
| Torque | 36 Nm at 5,000 rpm |
| Fuel system | Bosch electronic fuel injection and ride-by-wire |
| Exhaust | Double-skin catalyst and stainless steel silencer |
| Clutch | Wet multi-plate, assist and slipper |
| Gearbox | 6 speeds |
| Final drive | X-ring chain |
| Electronics | Cornering ABS and traction control, 5 riding modes, cruise control |
| Frame | Tubular steel perimeter, twin spar |
| Swingarm | Twin-sided steel |
| Front suspension | 43 mm telescopic fork, 130 mm travel |
| Rear suspension | Twin shocks with preload adjustment, 130 mm travel |
| Front brake | 310 mm disc, two-piston axial caliper |
| Rear brake | 255 mm disc, single-piston floating caliper |
| Wheels | Spoked with aluminum rims, tubed: 18 × 2.75 and 17 × 4.25 in |
| Tires | 100/90-18 and 150/70 R17 |
| Instruments | Round 4-inch TFT with Triumph navigation |
| Rake and trail | 25.4° and 100.4 mm |
| Wheelbase | 1,418 mm |
| Seat height | 790 mm (about 770 mm with the accessory low seat) |
| Height without mirrors | 1,081 mm |
| Handlebar width | 818 mm |
| Weight | 191 kg wet |
| Fuel tank | 14.5 liters |
| Consumption | 3.5 l/100 km |
| Emissions standard | Euro 5+ |
| License | A2 (unrestricted) |
| Price | To be announced (early 2027) |
| Arrival | Spring 2027 |
Price and arrival in Spain
Triumph has not given a price yet: it will announce it in early 2027, before the first bikes reach dealers in spring. You can already request information and a quote on the Spanish website.
For reference, the Speed 400 and Scrambler 400 X, with the same type of engine, cost much less than the T100 (from €11,695). The T40 is likely to sit somewhere in between, but until Triumph confirms it, that is only an estimate. We will update this article as soon as there is an official price.
T40 vs T100
The Bonneville T100 is still the "big" entry Bonneville: 900 cc twin, 65 hp and 80 Nm, 228 kg and A2 only with a restrictor kit. The T40 has half the power, but it weighs 37 kg less, is A2-legal out of the box and adds cruise control, a TFT screen with navigation and a six-speed gearbox as standard.
If you already have a full license or want the sound and punch of a twin, the T100 still makes sense. If you are starting out, the T40 is the easiest way to own a Bonneville.
What we like and what gives us pause
We like that it is not a "fake" Bonneville: the tank, spoked wheels, headlight and silencer have the proportions of the big ones. And the equipment is from a higher class: cornering ABS, cruise control, navigation and a center stand. At 191 kg with a 790 mm seat, it is very easy to handle.
What gives us pause is the price, still unknown, which will decide whether it is a real option for new riders. Tubed spoked wheels look great but are less practical when you get a puncture. And 32 hp is enough for town and country roads, but it may feel tight on a busy motorway.
A base for a cafe racer?
With its 400 cc engine, tubular frame and spoked wheels, the T40 could be a good base for a light cafe racer. If you convert one in Spain, these are the modifications to check first, case by case and depending on your registration document:
- Handlebar: clip-ons or a low bar change the riding position and the steering lock.
- Exhaust: a new silencer must be type-approved and meet the noise limits.
- Subframe: a solo tail affects the passenger seat.
- Turn signals and taillights: type-approved and fitted where the rules say.
This is general guidance and does not replace the judgment of the ITV (the Spanish roadworthiness test) station. Find out how legalizing modifications works (in Spanish). In the shop you will find parts and accessories for the Bonneville and handlebars.
Source and credits
Technical data and photos: Triumph Motorcycles España (official website, November 2026). More information at Gear Patrol. This article is our own summary and commentary.
