Triumph Unveils 2027 Bonneville T40 With 398 cc Single-Cylinder Engine
Triumph has launched the Bonneville T40 and T40 Black, with a 398 cc single-cylinder engine producing 30 HP. Pricing will be announced in early 2027.
The Triumph Bonneville T40 is the first Bonneville to join the brand's 400 series. Triumph has also introduced a darker T40 Black version alongside it. Until now, the Bonneville family has used only parallel-twin engines. The T40 brings the name together with a single-cylinder engine for the first time. Pricing will be announced in early 2027, and the first motorcycles are expected to reach US dealers in late spring 2027.
Engine and technical specifications
The T40 uses a retuned version of the 398 cc TR Series engine found in the Speed 400. The liquid-cooled, twin overhead cam, four-valve engine produces 30 HP at 7,000 rpm and 27 lb-ft (about 36.6 Nm) of torque at 5,000 rpm. The Speed 400 makes 39.5 HP at 8,000 rpm and 28 lb-ft of torque at 6,500 rpm, so the T40 reaches similar torque 1,500 rpm earlier. Triumph says it tuned the engine for low-rev riding in everyday use.
The six-speed gearbox has an assist and slipper clutch. The final drive is an X-ring chain. The fuel tank holds 3.8 gallons, and Triumph's EU test figure of 68 mpg gives an estimated range of about 260 miles.
A steel tubular frame links the headstock, swingarm and surrounding structures. Adjustment is limited to preload on the rear shock, and both ends offer 5.1 inches of travel. The front brake uses a 310 mm disc with a two-piston Bybre caliper, and the rear has a 255 mm disc. The seat height is 31.1 inches and the kerb weight is 421 pounds. An optional accessory seat lowers the height to 30.3 inches.
Electronics
The bike has five riding modes. Road, Rain and Eco come as standard, and two modes can be set by the rider. The modes change throttle response, traction control and ABS. Cornering ABS, cornering traction control and cruise control are standard. A 4-inch colour TFT display offers smartphone connectivity, a USB-C socket and map navigation through the new Triumph Navigation app. The lighting is fully LED.
Colours and range
The T40 and T40 Black differ only in their finish. The T40 will be sold in Meriden Blue or Tangerine Orange, or in New England White or Jet Black. The T40 Black pairs matt Pewter Grey or Phantom Black with black wheels. The T40 is the sixth model in the series. The 400 platform, built by Bajaj Auto in India, has sold more than 60,000 units in over 50 countries. US prices for the existing models range from $5,495 for the Speed 400 to $6,895 for the Scrambler 400 XC.
This article was compiled with the help of AI from information published by Ultimate Motorcycling.
