2026 Proton X90 MC spied at test track new 1.5T i-GT 4-cyl, looks the same as before, launching soon?

As Proton pushes deeper into 2026 with fresh updates across its SUV lineup, the spotlight has unexpectedly shifted to the flagship three-row Proton X90. During a recent media preview for the new X70 at Proton’s Shah Alam test facility, engineers were spotted testing a camouflaged X90 prototype right on the company’s own test track a clear sign that a minor change (MC) variant is in the works and could be launched relatively soon.

Unlike a full redesign, this latest prototype suggests Proton’s approach with the X90 will mirror that of the recently launched X70 MC3: meaningful updates under the skin with minimal visual revisions on the outside. Observers noted that the X90 test mule looked almost identical to the current model, implying that exterior styling tweaks will be kept subtle or even absent.

New Engine Under Test

What’s drawing the most attention isn’t the bodywork, but the likely arrival of the 1.5-litre turbocharged i-GT four-cylinder engine — the same powerplant confirmed for use in other 2026 Proton models like the X70 MC3 and expected across the wider Proton range. This 1.5T i-GT engine, which first appeared in the facelifted X50, delivers higher output and refinement compared to the outgoing three-cylinder turbo unit, and is part of Proton’s broader powertrain strategy moving forward.

Swapping in a more powerful and smoother four-cylinder turbo unit would mark a notable technical step for the X90, which currently uses a 1.5 litre turbocharged three-cylinder engine paired with a mild hybrid system on existing models. While official details remain unconfirmed, the test sightings strongly point to this engine being part of the MC update potentially enhancing drivability and performance while aligning the X90 more closely with its SUV siblings.

What This Means for the X90 Lineup

If Proton follows the X70 MC3 playbook, the X90 MC could bring gains on several fronts without altering its visual identity. The existing X90 already taps into a growing SUV segment in Malaysia by offering three-row practicality and competitive safety credentials, having earned a five-star ASEAN NCAP rating a strong selling point for family buyers.

Rather than overhaul the styling, Proton’s update may focus on improving powertrain efficiency, reducing NVH (noise, vibration, and harshness), and enhancing driving refinement subtle but meaningful benefits that don’t require dramatic exterior redesigns.

Why It Matters Now

Proton’s SUV lineup has become increasingly central to its strategy, with the success of the X70 and X50 paving the way for broader adoption of shared engines and technology across models. Introducing a refreshed X90 with a modern 1.5T i-GT four-cylinder engine would continue this momentum and help Proton sharpen its competitive edge in a segment where rivals are also stepping up their game.

For Proton customers and enthusiasts, the X90 MC’s imminent debut could mean bigger value for families seeking a large, comfortable SUV with up-to-date performance and usability all while keeping familiar design cues intact.