Toyota Supra GRMN to score BMW M3 power

Toyota has confirmed the high-performance GRMN version of the Toyota Supra will come equipped with a powertrain lifted directly from the next-gen BMW M4.

Until now, it was thought that engineers were going to turn up the boost on the regular car's B58 twin-scroll turbocharged 3.0-litre inline six-cylinder, but now Japan's

Instead, the Supra GRNM will reportedly harness the power of BMW M division's next-gen S58 twin-turbo 3.0-litre inline six, which will produce up to 375kW of power and 600Nm of torque in the 2021 BMW M3 and M4 -- although the Japanese reports says it will deliver the equivalent of 382kW/608Nm in the Toyota Supra GRMN.

Either outputs would represent a huge power and torque bump over the standard Supra, which even in more powerful MY2021 form still only produces 285kW and 500Nm of torque.

What's more, according to Toyota's chief engineer Tetsuya Tada, who broke the news to Best Car, the GRMN will ditch the standard Supra's eight-speed automatic transmission for a seven-speed M-DCT dual-clutch auto.

According to Tada, BMW was initially very reluctant to let go of its quick-shifting dual-clutch gearbox, which is understandable given the M3/M4 is expected to be offered with an eight-speed torque converter auto and there are no plans to drop the BMW M4 powertrain into the closely-related Z4.

To cope with the big bump in power, Toyota GR engineers will completely retune the Supra chassis and, possibly, enter a Supra GRMN prototype in the Nurburgring N24 endurance race as part of the car's development.

The bad news is there will be a bit of a wait until the Toyota Supra GRMN arrives -- in 2023.

Worse still, when it lands on the performance car landscape, Best Car says Toyota will make just 200 Supra GRMNs, each priced around 12 million yen ($A160,000).