Infiniti’s Bonkers QX80 R-Spec Is a 1,000-HP Monster With GT-R DNA

We didn’t know we wanted a 1,000 hp, GT-R-powered Infiniti QX80 until Nissan built it. Now we can’t help but drool at the idea and hope that Infiniti is just insane enough to make it a reality. Built for the upcoming 2025 SEMA Show in Las Vegas, the QX80 R-Spec takes the idea of a luxury sports SUV and rockets it to the moon thanks to a super V-6 twin-turbo booster.

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An even wilder creation than the already impressive QX80 Track Spec Concept from Monterey Car Week, at the heart of the QX80 R-Spec is a version of the 3.8-liter twin-turbo V-6 VR38DETT that powered Godzilla, aka the mighty Nissan GT-R. As if that wasn’t enough, the engine was handed off to Tsunemi Ooyama, one of the hand-picked engine builders from the GT-R T-Spec Takumi Edition. Ooyama-san built the one-off engine to be capable of up to 1,000 hp through the use of a pair of Garrett G-series turbochargers, ETS exhaust manifolds, and a custom flex fuel system. To bolt the VR38 to the seven-speed automatic transmission, Infiniti used a custom CNC machined adapter plate to make everything work together. Controlling the engine is a custom-tuned Motec engine management system and an electronic rear differential locker.

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With that much power on tap, just bolting in a 1,000 hp VR38DETT engine and calling the QX80 R-Spec done wasn’t going to be enough. Lurking behind its massive, 24x12-inch wheels are a set of Nissan GT-R carbon ceramic brakes modified to fit the three-row luxury SUV. Wrapping those dynamite-looking custom bronze rims are an equally whopping set of Yokohama Parada Spec-X tires measuring in at a 315/35R24. Safe to say, the QX80 R-Spec's gripping and stopping power should be tremendous for a vehicle of its size and heft. The R-Spec was also lowered thanks to a set of MCS three-way adjustable damping coilovers with Eibach ERS springs, which required the use of custom-made steering knuckles to help reduce bump steer. Its steering rack was relocated to enable better fitment to the new VR38 setup.

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To help give it the proper aggressive looks and enhanced aerodynamic capabilities to match the QX80 R-Spec's prodigious power and chassis updates, the Infiniti team created a widebody kit inspired by the GT-R T-Spec Takumi that includes an ARP front splitter and a huge rear wing that juts out from the top of the SUV. The custom bumpers and side sills help make the QX80 appear to sit even lower to the ground, further augmenting what the MCS coilovers achieved. Finishing off the body is wrap inspired by the legendary Midnight Purple offered for the R34 and R35 GT-Rs, along with a custom rear diffuser and an exhaust system with R35-inspired exhaust tips.

While amazing, it’s unlikely that we’ll get anything close to a production version of the QX80 R-Spec. Just offering a GT-R engine capable of 1,000 hp would be an emissions nightmare that not many automakers would want to tackle, let alone Nissan. Add in the custom front steering knuckles and relocated steering rack, and we don't see this being a feasible production vehicle. It''s more likely that we'll see something along the lines of the Track Spec concept, which largely draws from parts and upgrades that are more easily applied to the vehicle. Still, the QX80 R-Spec is an amazing project and a signal that internal combustion engine performance may not be dead yet Nissan and Infiniti. If you want to see it for yourself, it will be on display at the Nissan booth for the 2025 SEMA Show at the Las Vegas Convention Center that takes place November 4th to the 7th.