First, the bad news: a Toyota Supra GRMN is indeed coming, but it won’t see the light of day until 2023 and will be produced in very limited numbers. But here’s the good news: it will be powered by a beefed-up version of the upcoming BMW M3/M4’s twin-turbo 3.0-litre inline-6 engine,mated with a dual-clutch automatic ‘box!

The car displayed here is theGR Supra Heritage Edition that Toyota displayed at the 2019 SEMA Show

While local fans of the 2019/20 Cars.co.za Consumer Awards – powered by WesBank category winnerToyota GR Supra hold thumbs that the South African market will be availed the updated 285 kW version of the Japanese rear-wheel coupe later this year, which would see its peak output upped to match that of its cousin, the BMW Z4 M40i (as previewed by the JDM’s RZ derivative), the Japanese website Best Car Webhas revealed tantalising details about the eagerly anticipated GRMN derivative.

Best Car Web anticipates that the production version of the Supra GRMN might look like this…

Sensationally, the report states that the Supra GRMN won’t be powered by a reworked version of the current GR Supra and Z4 M40i’s 3.0-litre inline-6 turbopetrol, which has a single, twin-scroll turbocharger – it won't even have the same gearbox. Instead, the ultimate Toyota Supra derivative will feature the Munich-based firm’s 3.0-litre twin-turbo inline-6 motor (S58), which produces 353 kW in standard- and 375 kW in Competition versions of the upcoming BMW M3 and M4.

In fact, the article quotes none other than Supra chief engineer Tetsuya Tada as saying BMW needed some convincing to avail Toyota with the outgoing M3/M4’s 7-speed M-DCT dual-clutch automatic gearbox, because the S58 motor will be mated with an 8-speed torque-converter automatic transmission in the various new M3s and M4s.

Read our BMW M3 (2020) International Prototype Drive

Best Car Web reports Toyota has decided that the Supra GRMN will be introduced in 2023 and that only 200 units of the car will be produced. But wait, there's more: the mighty coupe will haveslightly beefier maximum engine outputs than the Competition versions of the S58-powered BMW M3 and M4: 382 kW and 608 Nm of torque.

The Toyota GRMN is likely to look even more purposeful than the SEMA show's 2019 Heritage Edition!

Naturally, “the GR development team is fully committed to tuning (the Supra’s) chassis to suit the heightened outputs of the new engine”, and (will apply) the knowledge gained by the Aiki-based firm’s participation in the Nurburgring 24 Hours “to the maximum”, the report said.

BMW, by contrast, has no plans to utilise the S58 motor in the Z4, while the Supra’s product lifecycle is scheduled to end 2025. Toyota does not plan to replace the Supra, of which the GRMN will be the ultimate edition. Judging by current market trends, the Z4 may not continue beyond that point either.

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