Infiniti QX80 R-Spec Specs, Engine, and Release Info: Full Breakdown

Infiniti QX80 R-Spec Specs, Engine, and Release Info: Full Breakdown

Luxury meets insanity. The Infiniti QX80 is already one of the most opulent full-size SUVs on the market but for SEMA 2025, Infiniti has ripped up the rulebook.

Meet the QX80 R-Spec: a one-off, track-inspired monster that swaps refinement for raw aggression powered by a tuned Nissan GT-R engine making 1,000 horsepower.

Yes, you read that right. This full-size luxury SUV now packs the heart of a supercar.

At its core lies the legendary Nissan GT-R 3.8L twin-turbo V6 (VR38DETT) not just borrowed, but comprehensively re-engineered:

• Garrett G-series turbochargers for massive boost
• JE forged pistons
• Boostline connecting rods
• ARP rod bolts for extreme durability
• ETS exhaust manifolds
• Full engine management via a MOTEC ECU for precision tuning

Infiniti didn’t stop at internals. The build includes:

• Custom high-flow fuel system
• Upgraded intake setup
• Twin front-mounted intercoolers
• CSF engine and transmission oil coolers to handle sustained power

This isn’t a modified SUV it’s a rolling engineering showcase.

Infiniti QX80 R-Spec Specs, Engine, and Release Info: Full Breakdown

The R-Spec doesn’t just share an engine with the GT-R it wears its soul.

• Exterior inspired by the 2024 GT-R T-Spec Takumi Edition, including its signature Midnight Purple wrap
• R35-style quad exhaust finishers integrated into a custom rear bumper
• Aggressive wide-body kit for muscular stance and improved aerodynamics
• Custom ARP front splitter enhances downforce and visual drama

It’s unmistakably GT-R stretched, widened, and standing on four massive wheels.

To match its performance ambitions, the QX80 R-Spec rides on:

• Massive 24-inch bronze wheels styled after GT-R designs
• Wrapped in Yokohama PARADA Spec-X tires tuned for grip and show
• Hiding carbon-ceramic brakes lifted directly from the GT-R, ensuring fade-free stopping under extreme loads

Suspension has been completely overhauled:

• Custom coilover setup with Eibach springs
• Steering rack relocated to accommodate the new geometry
• Bump-steer knuckles modified for precise handling despite the SUV’s size

It’s suspension tuning worthy of a race car in a three-ton luxury behemoth.

Infiniti QX80 R-Spec Specs, Engine, and Release Info: Full Breakdown

Infiniti hasn’t shown the interior so it’s likely unchanged from the standard QX80. That means hand-stitched semi-aniline leather, open-pore wood trim, and a serene cabin designed for comfort, not combat.

But given the wild exterior and mechanical fury underhood, we wouldn’t be surprised if the team added R-Spec branding, performance gauges, or even racing seats behind closed doors.

For now, the focus is clearly on what’s beneath the skin.

The QX80 R-Spec follows the 650-hp Infiniti Track Spec unveiled at Monterey Car Week 2024 but this is a far more radical statement.

As Tiago Castro, Vice President of Infiniti Americas, put it:

“The QX80 R-Spec is extreme, aggressive, and a showcase of what Infiniti can do when our engineering and design teams take off all the guardrails.”

And those guardrails are nowhere to be found.

Infiniti QX80 R-Spec Specs, Engine, and Release Info: Full Breakdown

While Infiniti hasn’t released performance figures, a 1,000-horsepower AWD full-size SUV promises brutal acceleration likely eclipsing most production supercars off the line.

Let’s be clear: the QX80 R-Spec is a concept, built for SEMA, not production. It won’t hit dealerships. There’s no price tag. No EPA ratings. No warranty.

But as a statement piece, it’s priceless.

It proves that Infiniti still has passion in its veins and that when you drop the constraints of emissions, regulations, and market expectations, the brand can build something truly outrageous.

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