Short answer: the Triumph Speed 400 is the cheapest and lightest of these three roadsters and the most comfortable for everyday riding, the Royal Enfield Guerrilla 450 has the most torque, and the KTM 390 Duke has the most power. The Speed 400 costs ₹2.40 lakh*, the Guerrilla 450 starts at ₹2.49 lakh* and the KTM 390 Duke launched at ₹2.77 lakh* ex-showroom.
Key facts.
Triumph Speed 400: ₹2.40 lakh*. Now a 349cc single with 37hp and 32Nm, moved under 350cc to qualify for the lower 18% GST rate. Kerb weight 179kg.
Royal Enfield Guerrilla 450: ₹2.49 lakh* to ₹2.72 lakh*. A 452cc liquid-cooled single with 40PS and 40Nm, a 6-speed gearbox and dual-channel ABS. Kerb weight 185kg.
KTM 390 Duke: launched on 20 April 2026 at ₹2,77,268* ex-showroom Delhi with a 349cc engine making 41.5PS and 33.5Nm. The 399cc 390 Duke R (46PS, 39Nm) cost ₹3,39,001* at the same time.
Price and specifications compared.
Triumph Speed 400 | Royal Enfield Guerrilla 450 | KTM 390 Duke | |
|---|---|---|---|
Price* | ₹2.40 lakh | ₹2.49 lakh to ₹2.72 lakh | ₹2.77 lakh (April 2026 launch price) |
Engine | 349cc single | 452cc single | 349cc single |
Power | 37hp | 40PS | 41.5PS |
Torque | 32Nm | 40Nm | 33.5Nm |
Kerb weight | 179kg | 185kg | Not listed here |
Round by round.
Round | Winner | Why |
|---|---|---|
Price | Speed 400 | About ₹9,000* below the Guerrilla 450 and ₹37,000* below the 390 Duke. |
Power | KTM 390 Duke | 41.5PS, or 46PS in the 399cc Duke R. |
Torque | Guerrilla 450 | 40Nm from its larger 452cc engine. |
Weight | Speed 400 | 179kg, the lightest figure here. |
Everyday comfort | Speed 400 | Autocar India notes its upright riding position puts less strain on wrists and back. |
Who each one suits.
Choose the Speed 400 if you want a light, comfortable roadster for the city and occasional highway rides at the lowest price.
Choose the Guerrilla 450 if you want the most pulling power for highway riding with a pillion.
Choose the KTM 390 Duke if outright performance and a sharp, sporty character matter most.
Test ride the Speed 400 in Delhi NCR.
Shiva Scooter Agency, Shiva Group's Triumph dealership at 32 Defence Enclave, Vikas Marg, Preet Vihar, New Delhi, and C-60, Sector 2, Noida, can arrange a Speed 400 test ride. See our Triumph showroom guide for Delhi NCR for every model and price band.
Frequently asked questions.
Which is cheapest: Speed 400, Guerrilla 450 or 390 Duke?
The Triumph Speed 400, at ₹2.40 lakh* ex-showroom.
Is the Triumph Speed 400 still a 400cc bike?
No. It now uses a 349cc engine with 37hp and 32Nm, which brings it under the lower GST rate for motorcycles up to 350cc.
Which is the most powerful?
The KTM 390 Duke, with 41.5PS from its 349cc engine, or 46PS in the 399cc Duke R.
Which has the most torque?
The Royal Enfield Guerrilla 450, with 40Nm.
Related comparisons.
Triumph Bonneville T40 vs Royal Enfield Classic 350 vs Honda CB350
Triumph Scrambler 400 X vs Royal Enfield Scram 440 vs Yezdi Scrambler
Terms and conditions.
*Prices are ex-showroom prices in India, checked in November 2026 unless another date is given. They can change without notice.
*Ex-showroom prices exclude registration, road tax, insurance, accessories, extended warranty and other charges. On-road prices depend on the state of registration and the variant.
*Specifications are the manufacturers' published figures as reported by the sources below. Performance and fuel-economy figures are claimed, not measured by us.
*Round winners are our editorial judgement based on published prices and specifications. They are not the result of a road test.
*Offers, availability, colours and delivery times vary by variant and over time. Confirm the current price and an on-road quote with Shiva Scooter Agency before you book.
Sources.
Autocar India: Triumph Speed 400, checked November 2026
Autocar India: Royal Enfield Guerrilla 450, checked November 2026
Bajaj Auto: KTM 390 Duke 350cc launch, 20 April 2026, checked November 2026
Disclosure: Shiva Group publishes this newsroom and is an authorised Triumph Motorcycles dealer through Shiva Scooter Agency (Preet Vihar, New Delhi, and Sector 2, Noida). Shiva Group also sells KTM motorcycles.
About Shiva Group
Shiva Group is a family-owned automotive retail group with a legacy since 1928 and in automotive retail since 1972. Headquartered in Delhi NCR, the Group is an authorised sales and service partner for nine brands across two-wheelers, cars and SUVs, and commercial vehicles — Bajaj, Chetak, KTM, Triumph, Mahindra, Land Rover, MG Select, Bajaj Three-Wheelers and Mahindra Commercial — with a network across Delhi NCR and North India.
