2024 Triumph Speed 400 Specs & Review

Triumph’s smallest modern roadster channels classic style with real-world performance and practicality. In this Triumph Speed 400 review, we break down the 2024 Triumph Speed 400 specs for riders eyeing an accessible, everyday fun machine that still packs premium touches where they count.

Key Specs at a Glance

• Engine type: Liquid-cooled, 4 valve, DOHC, single-cylinder
• Displacement: 398.15 cc
• Power: 39.5 HP (40 PS) @ 8,000 rpm
• Torque: 27.7 ft-lb @ 6,500 rpm
• Wet weight: 375 lbs / 170 kg
• Triumph Speed 400 seat height: 790 mm / 31.10 in

Engine & Performance

The 398.15 cc single puts out 39.5 HP (40 PS) at 8,000 rpm and 27.7 ft-lb at 6,500 rpm, a combination that feels lively off the line and punchy in the midrange. Its 89.0 mm bore and 64.0 mm stroke, paired with a 12:1 compression ratio, give the engine a willing spin without sacrificing tractability in traffic. Around town, it’s the strong torque curve that shines—short shifts keep you right in the meat of the power for effortless overtakes.

Bosch electronic fuel injection with electronic throttle control delivers clean fueling and precise response, which makes the bike feel more polished than many singles. A wet, multi-plate slip clutch reduces lever effort and calms aggressive downshifts, while the 6-speed gearbox provides the right spacing to cruise comfortably and keep the engine on the boil when the road opens up. An X-ring chain final drive keeps maintenance sensible, and the stainless twin-skin header with stainless silencer adds durability to daily use.

If you’re chasing twisty backroads, the Speed 400’s output is enough to be engaging without overwhelming newer riders. It rewards carrying corner speed and smooth inputs rather than brute force.

Handling, Comfort & Triumph Speed 400 Seat Height

The Triumph Speed 400 seat height is 790 mm (31.10 in), offering easy flat-foot confidence for many riders. Combined with the Triumph Speed 400 weight of 375 lbs (170 kg) wet, parking-lot maneuvers and tight U-turns feel approachable. The 814 mm (32.05 in) wide handlebar gives good leverage, helping the bike flick quickly into bends and straighten up on exit.

Chassis geometry shows Triumph’s intent: a 1377 mm (54.21 in) wheelbase with 24.6° rake and 102 mm (4.02 in) trail balances agility with stability. The 43 mm upside-down Big Piston forks offer 140 mm (5.51 in) of travel up front, paired with a gas monoshock RSU featuring an external reservoir and preload adjustment with 130 mm (5.12 in) of rear travel. The setup is supple enough for rough city streets yet composed on a spirited weekend ride.

Cast aluminum 10-spoke wheels (17 x 3 in front, 17 x 4 in rear) run a neutral-steering 110/70 R17 front and 150/60 R17 rear tire combo, making the chassis predictable and confidence-inspiring for a wide range of riders and skill levels.

Equipment & Features

Braking is handled by a 300 mm (11.81 in) front disc with a four-piston radial caliper and ABS, backed by a 230 mm (9.06 in) rear disc with a floating caliper and ABS. The result is strong initial bite with a progressive lever feel and added safety in poor conditions.

Instrumentation mixes old-school and modern: an analogue speedometer with an integrated multi-function LCD keeps the retro vibe intact while giving you key data at a glance. The frame is a hybrid spine/perimeter tubular steel unit with a bolt-on rear subframe, and the swingarm is a twin-sided cast aluminum piece—sensible choices for strength and serviceability. A 13-litre (3.43 US gal) fuel tank supports practical commuting, and service intervals are a lengthy 10,000 miles / 16,000 km or 12 months.

Who Is the 2024 Triumph Speed 400 For?

• Newer riders who want a premium-feeling first big bike: approachable seat height, friendly power delivery, ABS, and a slip clutch.
• Daily commuters seeking style and simplicity: Bosch EFI, long service intervals, and manageable size.
• Experienced riders looking for a fun, light, retro-modern runabout to complement a larger bike in the garage.

Torquepedia Verdict

The Speed 400 nails the essentials: a responsive single with crisp fueling, a sweet-handling chassis, real brakes with ABS, and everyday ergonomics that welcome a wide audience. The numbers tell a compelling story—39.5 HP, 27.7 ft-lb, 375 lbs wet, 790 mm seat height—but it’s how they add up on the road that matters: easy, eager, and engaging.

If you want a compact roadster that prioritizes core riding feel over gadget overload, the 2024 Triumph Speed 400 is a standout. It’s not about brute power; it’s about balance, character, and usability—exactly what this class should deliver.

FAQ

• Is the 2024 Triumph Speed 400 good for beginners? Yes. With 39.5 HP (40 PS), 27.7 ft-lb of torque, ABS brakes, and a slip clutch, it’s approachable yet engaging as skills grow.

• What is the seat height of the 2024 Triumph Speed 400? The seat height is 790 mm (31.10 in).

• How heavy is the 2024 Triumph Speed 400? The Triumph Speed 400 weight is 375 lbs (170 kg) wet.

• What are the service intervals on the Speed 400? 10,000 miles / 16,000 km or 12 months, according to the provided specs.