2025 Toyota GRMN Supra caught on camera

The long-rumoured high-performance GRMN version of the latest Toyota Supra sports car appears to be headed for reality, if new photos captured in Europe are a guide.

Reports out of Japan have for years claimed there are plans to fit a new 'GRMN' Supra with the 3.0-litre twin-turbocharged inline six-cylinder engine from the BMW M3 and M4, as a send-off to the current model.

GRMN – short for Gazoo Racing Meisters of the Nurburgring – is Toyota's top performance badge, and is reserved for limited editions with more performance than standard GR cars.

Now Toyota has been photographed testing a lightly-disguised Supra with upgraded aerodynamics, and larger wheels and brakes on and around the Nurburgring race circuit in Germany.

Visible in the photos is a longer front splitter, aero 'flics' on the front bumper, and a fixed rear spoiler on the tailgate – plus new, seemingly 20-inch alloy wheels, larger drilled brake discs, and what appear to be larger brake calipers.

The rear spoiler appears to be shared with a 45th Anniversary Supra special edition introduced in the US earlier this year. The upgrades visible on this prototype are not as extreme as those previewed by illustrations in Japanese media.

However the photos cannot confirm the rumours of BMW M power under the bonnet.

Japanese magazines such as Best Car report Toyota has secured a batch of the M3 and M4's 3.0-litre twin-turbo 'S58' inline-six engines, developing about 405kW.

It would represent a significant upgrade over the single-turbo 3.0-litre 'B58' inline-six in the current GR Supra, which develops 285kW and 500Nm – and is an engine not available in the Supra's twin under the skin, the BMW Z4 roadster.

Unusually, reports claim the S58 engine will be matched with the seven-speed dual-clutch automatic transmission used in the previous generation of BMW M cars, last used in the final run of first-generation M2 coupes built in 2021.

The latest BMW M3 and M4 – and all other current BMW M cars – use the same eight-speed torque-converter automatic transmission as the Supra, designed by Germany's ZF.

Japanese reports claim the GRMN Supra will be a limited edition designed to send off the current-generation 'A90' Supra, which is due to end production in 2025 or 2026 in line with its BMW Z4 twin built on the same production line in Austria.

Plans for a new Supra remain unclear, and Japanese media speculation ranges on if it will use BMW inline-six petrol power once again, or will go electric.