Dominar 400 vs Triumph Speed 400: Who Wins the New 350cc Showdown?

Dominar 400 vs Triumph Speed 400 is a comparison that looks completely different in June 2026 than it did even six months ago, because both motorcycles have been re-engineered under India's new GST 2.0 tax structure. The Bajaj Dominar 400 is now priced at approximately ₹2.03 lakh ex-showroom, while the Triumph Speed 400 costs around ₹2.34 lakh ex-showroom — both having shed engine capacity to duck under the 350cc threshold that separates the 18% GST slab from the punishing 40% bracket above it. The core dilemma for Indian buyers hasn't changed even if the numbers have: the Dominar still offers touring weight and road presence, while the Speed 400 still leans on premium fit, lighter handling, and Triumph's badge value.

Dominar 400 vs Triumph Speed 400 Price and Specs in 2026

Here's the headline change. Bajaj shortened the Dominar's stroke to bring displacement down from 373.3cc to 349.13cc, while Triumph reworked its TR-Series motor from 398.15cc to 349cc. Both moves were a direct response to the same tax rule, and both brands kept their "400" badges for brand recall even though neither engine is technically a 400 anymore. Bajaj's own Pulsar NS400Z went through an identical 349cc downsizing for the same reason, so this strategy isn't unique to the Dominar — it's reshaping the entire class of 350cc bikes in India that used to sit just above this tax line.

On power, the Dominar's 349cc unit produces 40 PS at 9,000rpm and 33.2 Nm at 7,500rpm, retaining a six-speed gearbox, slipper clutch, USD forks, dual-channel ABS, and now traction control across the range. The Speed 400's 349cc engine makes 37 PS at 8,500rpm and 32 Nm at 7,000rpm, paired with a slip-and-assist clutch, 43mm USD forks, switchable dual-channel ABS, and traction control as standard. Triumph's claimed advantage is a roughly 10% bump in fuel efficiency, while Bajaj's engineers focused on keeping the spread of usable torque close to the outgoing 373cc bike's character.

Engine Feel and Acceleration

On paper the Dominar has the power edge, but it carries more weight to push around — 190kg kerb versus the Speed 400's 179kg. That 11kg gap, plus the Triumph's lighter clutch action and shorter gearing, makes the Speed 400 feel quicker off the line in city traffic even though the Dominar pulls harder on a clear stretch. Ride the Dominar through Delhi's flyover stop-start and the bigger flywheel mass smooths out clutch modulation; ride the Speed 400 through the same traffic and it darts between gaps with noticeably less effort at the handlebar.

City Handling and Traffic Comfort

The Speed 400 wins city duty comfortably. Its narrower tank, lower seat-to-handlebar reach, and lighter overall mass make filtering through Mumbai's evening crawl or Bengaluru's signal-to-signal grind far less tiring on the wrists and shoulders. The Dominar isn't unwieldy, but its longer wheelbase and heavier front end ask for more deliberate inputs at parking speeds and U-turns — something riders coming from 150cc commuters will notice in the first week of ownership.

Highway Touring Ability

Flip the script on the highway and the Dominar reclaims ground. Its perimeter frame, relaxed ergonomics, and that extra kerb weight translate into a planted, unshaken feel at 100-110kmph on the Mumbai-Pune or Delhi-Jaipur stretch, especially with a pillion and luggage strapped to the factory-fitted bungee points. The Speed 400 is composed too, but its café-racer-adjacent stance puts more weight on the wrists over a three-hour highway run, and its smaller tank means more frequent fuel stops on a weekend touring loop.

Speed 400 vs Dominar Mileage and Monthly Running Cost

Real-world mileage for the new-generation Dominar 400 settles around 28-32 kmpl, while the downsized Speed 400 returns roughly 27-31 kmpl in mixed city-highway use. At Delhi's current petrol price of roughly ₹103 per litre, a rider covering 1,000km a month on the Dominar spends close to ₹3,400 on fuel, against approximately ₹3,650 for the Speed 400 — a gap of barely ₹250 a month, which won't decide this comparison on its own. Service costs lean toward the Dominar too, given Bajaj's wider rural and semi-urban dealer spread compared to Triumph's still-growing network concentrated in metros and tier-1 cities.

Features, Safety Tech and Ownership

Both bikes now share traction control and dual-channel ABS as standard, closing a gap that used to favour Triumph. The Dominar adds four selectable ride modes and a twin-display console with a fuel-tank-mounted secondary screen, leaning into its touring identity. The Speed 400 counters with better switchgear feel, a more premium-finished console, and metal detailing that simply looks and feels like a more expensive motorcycle up close — that's the Triumph badge doing its job. Resale value still favours the Speed 400 marginally in the used market, where the Triumph name commands a premium even two or three years down the line.

Where the KTM 390 Duke Fits In

Buyers cross-shopping this segment in 2026 are increasingly throwing the KTM 390 Duke into the mix too, especially after KTM gave it the same sub-350cc treatment. The 349cc Duke now makes a sportier 41.5 PS and 33.5 Nm, but at around ₹2.77 lakh ex-showroom, it costs meaningfully more than both the Dominar and the Speed 400, positioning it as the choice for riders who want outright performance and don't mind paying for it. For most buyers comparing Dominar 400 vs Triumph Speed 400 on value, the Duke sits a notch above as an aspirational upgrade rather than a direct rival.

Which Is Better: Dominar 400 or Speed 400?

Choose the Dominar 400 if touring comfort, pillion-friendliness, and the better touring bike under ₹2.5 lakh on-road matter more to you than badge appeal. Choose the Speed 400 if you want lighter city manners, a more premium ownership feel, and Triumph's resale and brand pull in your corner. For most Indian buyers shopping in the ₹2.35 lakh to ₹2.75 lakh on-road bracket, the Speed 400 edges ahead as the better all-rounder — its lighter weight and city-friendly character suit how most owners actually use a 350-400cc motorcycle day to day, while the Dominar remains the smarter pick specifically for buyers who prioritise long-distance touring over everyday agility. Check the on-road price and EMI for the Dominar 400 and Triumph Speed 400 in your city on Drivio.