Triumph vs Royal Enfield bikes comparison hero banner showing Triumph Trident 660, Bonneville T120 and Royal Enfield Classic 350 with riders and blog headline

Triumph 350cc vs 400cc: Everything That Changes With the Downsized Engine

A Complete Powertrain & Price Comparison for Indian Riders | April 2026

The Indian two-wheeler market just witnessed one of its most significant shake-ups in recent memory. Triumph Motorcycles, in partnership with Bajaj Auto, officially launched its entire 400 range with downsized 350cc engines on April 6, 2026. If you have been eyeing the Speed 400, Scrambler 400, Thruxton 400, or Speed T4, this blog breaks down exactly what has changed, what has stayed the same, and, most importantly, whether the new 350cc engine is still worth your money.

Spoiler: the price cuts are real, the performance drop is marginal, and the bikes still carry the '400' badge. Let's dig in.

Rider on a yellow Triumph Trident 660 motorcycle cruising on a city road wearing helmet and riding gear

Why Did Triumph Downsize From 400cc to 350cc?

The short answer: taxes. The Indian government's GST 2.0 reform, introduced in September 2025, fundamentally restructured motorcycle taxation:

  • Motorcycles up to 350cc - taxed at 18% GST
  • Motorcycles above 350cc - taxed at a steep 40% GST

Previously, the tax structure was 28% below 350cc and 31% above it, a manageable gap. Under GST 2.0, the gap became enormous. For Bajaj and Triumph to stay competitive, dropping below the 350cc threshold was not just smart,  it was essential.

Triumph is not alone in this. KTM and Bajaj's own lineup are also going through the same downsizing exercise. Royal Enfield, which already dominates the sub-350cc space, had less urgency.

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What Changed Under the Hood: 350cc vs 400cc Engine Specs

The new engine is not an entirely new unit. Triumph achieved the downsizing by shortening the stroke, from 64mm to 56.1mm, while keeping the same 89mm bore. The result is a 349cc, single-cylinder, liquid-cooled motor carrying the 'TR Series' badge on the engine block.

Triumph Speed 400 and Royal Enfield Classic 350 parked side by side showing design comparison

Speed 400 / Scrambler 400 / Scrambler 400 XC: Engine Comparison

Specification 400cc (Old)  350cc (New)
Displacement 398.15cc 349cc
Bore x Stroke 89mm x 64mm 89mm x 56.1mm
Peak Power 40hp @ 8,000rpm 37hp @ 8,500rpm
Peak Torque 37.5Nm @ 6,500rpm 32Nm @ 7,000rpm
0-100 kmph 7.4 seconds 8.8 seconds
Top Speed 146.5 kmph 144 kmph

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The New Pricing: How Much Cheaper Are the 350cc Models?

Model Old Price (400cc) New Price (350cc) Difference
Speed T4 ₹1.95 lakh ₹1.95 lakh No Change
Speed 400 ₹2.39 lakh ₹2.32 lakh ₹7,110
Tracker 400 New Model ₹2.46 lakh --
Scrambler 400 ₹2.70 lakh ₹2.59 lakh ₹11,000
Thruxton 400 ₹2.76 lakh ₹2.66 lakh ₹10,000
Scrambler 400 XC ₹2.97 lakh ₹2.90 lakh ₹7,000

All prices are ex-showroom, Delhi.

What Stays the Same? More Than You Think

Here is the reassuring part for prospective buyers: almost everything that you loved about the 400cc lineup remains untouched:

  • Design, styling, colours, and badging are identical. The bikes still say 'Speed 400', 'Scrambler 400', and 'Thruxton 400'.
  • Chassis, frame, suspension, and brakes, no changes.
  • Features, instrument cluster, switchgear, all carried over.
  • The engine retains liquid-cooling and the same basic architecture.

In short, the bikes look, feel, and ride almost the same. The differences will primarily show up in hard acceleration runs and top speed, not in day-to-day city or highway riding.

Triumph Bonneville T120 Black motorcycle parked in a desert landscape with mountains in the background

New Addition: The Triumph Tracker 400

The 350cc launch also brought a brand-new model to the Indian lineup,  the Triumph Tracker 400. Available only with the new 350cc engine in India (unlike its international 400cc sibling), it slots between the Speed 400 and Scrambler 400 XC at ₹2.46 lakh ex-showroom, Delhi.

The Tracker 400 uses the same top state of tune as the Thruxton 400, producing 40hp at 8,750rpm and 32 N · m at 7,500rpm, making it one of the most powerful models in the entire 350cc lineup.

Will the 400cc Models Continue in India?

Yes, at least for now. Bajaj and Triumph have confirmed that the existing 398cc-powered models will continue to be sold alongside the new 350cc range. Since Bajaj manufactures the 400cc platform for international markets, the company plans to monitor demand before making any final decision on the future of the 400cc variants in India.

Dealers have already started guiding customers towards the new 350cc bikes, and the pricing advantage is clear. Whether the 400cc models survive in India long-term will depend entirely on buyer preference.

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Should You Buy the 350cc or Wait for the 400cc?

For the vast majority of Indian riders, especially those riding in cities, on state highways, or doing occasional weekend touring, the 350cc engines will deliver a very similar experience to the 400cc motors. The power drop of 3hp and torque reduction of 5.5 N · m are unlikely to be felt on the road in real-world riding conditions.

The genuine advantages of going 350cc are:

  • Lower purchase price, up to ₹11,000 cheaper
  • Lower insurance costs due to reduced engine displacement
  • Potentially lower road tax in some states
  • The same iconic design and Triumph badge

However, if you are a performance-focused rider who enjoys spirited riding, track days, or frequent long highway stretches where top-end power matters, the 400cc version — if still available- might justify its premium.

The Bigger Picture: What This Means for the Indian Market

Triumph's move signals a new era for the Indian mid-size motorcycle segment. The brand that once competed squarely against Royal Enfield's Himalayan 450 and KTM's 390 range now has a stronger value proposition. At ₹1.95 lakh for the Speed T4 and ₹2.32 lakh for the Speed 400, Triumph is now pricing itself aggressively in territory previously dominated by Royal Enfield's Classic 350, Hunter 350, and Meteor 350.

The coming months will reveal how Indian riders respond. But one thing is clear: the British heritage brand, with its Indian partner, is playing the long game, and the 350cc strategy is a well-calculated move.

Conclusion

The Triumph 350cc vs 400cc debate ultimately comes down to this: the new 350cc bikes are slightly detuned, noticeably more affordable, and essentially identical in everything else. For 95% of Indian riders, the 350cc range is the smarter buy, especially given the GST savings passed on to consumers.

Whether you are a first-time buyer stepping up from a commuter bike or a seasoned rider who has always wanted a Triumph, April 2026 is arguably the best time in history to buy one.

 

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