Imagine being the test engineer driving the 2025 Toyota Supra GRMN right now. With the world debating the engine choice of this hotter version and the prototype sporting the endangered species that is the six-speed manual gearbox, it must be a pretty rewarding job.
As some of you know, the Mk V Toyota Supra shares its chassis and powertrain with the BMW Z4. Right now, you can have the Japanese sportscar with the B48 2.0L turbo-four or the B58 3.0L turbocharged straight-six. However, while BMW only offers a 6-speed manual on the B48-fitted Z4 (i.e., the B58-powered Z4 M40i range-topper is 8-speed auto-only), Toyota lets you get both the four- and the six-cylinder Supra with either a 6-speed manual or an 8-speed automatic.
As for the 2025 Supra GRMN we have here, this will enter a territory where the Z4 has no access, as the Bavarian roadster lacks an all-out M version. Even so, the GRMN Supra has to fight competitors like the 2024 Nissan Z Nismo (420 hp) and the 2024 Ford Mustang (480 hp for the GT and 500 hp for the Dark Horse).
Ultimate Mk V Supra now in final testing stage
The 2025 Supra GRMN test vehicle that brought us here was recently spotted lapping the Nurburgring (like the 992 911 GT3 RS Manthey) at the kind of pace you’d expect from such a session. This not only confirms all the rumors about a higher-performance version of the six-cylinder Supra, but also allows us to listen to the sports car. And, judging by the upshift at the 0:23 point, it sounds like the GRMN Supra prototype has a good old manual gearbox.
The GRMN should also be offered with the 8-speed automatic and there were even Japanese rumors about the two-pedal duties being covered by a 7-speed dual-clutch instead. However, we’d take this with a grain of salt.
It’s no secret that the 2025 Supra GRMN is getting BMW’s S58 3.0-liter straight-six, a twin-turbo evolution of the B58. And since real-world tests have shown that the B58 Supra has its implementation of the engine rather than a 100% overlap with the Z4 M40i, you should also expect the GRMN Supra to pack a similar setup.
And the question is this: will the 2025 Supra GRMN pack around 473 hp (480 PS) like the standard (aka non-Competition) BMW M4 or will it sit slightly lower, delivering around 453 hp (460 PS) as is the case with the BMW M2? For the record, both those BMW Ms let buyers choose between a 6-speed manual and an 8-speed automatic.
Even if BMW aims to prevent the Supra, which has outsold the Z4, from carnivalizing the M4, this wouldn’t be as dramatic as the situation of the original 2020MY Supra, whose six-cylinder version was limited to 335 hp-the cap was eventually removed, with all subsequent Supras matching the Z4 M40i’s 382 hp output.
2025 Toyota Supra GRMN pricing and release date
The 2025 Toyota Supra GRMN should come with an MSRP of around $70,000. That’s somewhere in between the M2 and the M4, while topping the Nissan Z Nismo by at least $5,000. Alas, the dreaded dealer markups may put the M-powered Supra past the $100,000 mark.
Powertrain aside, with Toyota’s GRMN standing for Gazoo Racing, tuned by the Meister of the Nurburgring, the 2025 Supra range-topper is also getting upgraded suspension and this Nurburgring-testing prototype seems to be sitting lower than the standard car. The brakes are also getting overhauled. You can see the large, drilled rotors with red calipers on the tester, as well as the Michelin Pilot Cup 2 tires.
Despite the camouflage present on the test vehicle, the dual canards on the front bumper and the fixed rear wing are an obvious presence. And once the 2025 Supra GRMN makes its debut—sometime in the next six months—you can also expect some carbon parts for the Japanese machine.