According to a document that had been published by transmission manufacturer ZF, both the Supra and Z4 will come powered by two BMW sourced engines, the smallest being a 2.0-litre turbo in three states of tune; the N20B20 that will make 135kW or 180kW and the B48B20 that will punch out 195kW.

Based on the documents, the former pair will be reserved for the Z4 Coupe only while the latter will power the Z4 Roadster and Supra, all connected to a version of the eight-speed automatic gearbox and not a dual-clutch as previously claimed.

At the sharp-end, both will also make use of BMW’s single turbo 3.0-litre B58B30 straight-six that will produce 250kW and 280kW respectively, the latter output somewhat surprisingly reserved for the Z4 Roadster where it reportedly spawn a M40i variant like the X3.

The leaked papers also appears to confirm previous reports that the Supra will indeed not be offered with a manual gearbox as per comments from its Chief Engineer Tetsuya Tada, who also seemingly backtracked on prior reports about the possibility of there being a Supra with only four cylinders.

Reportedly, Tada told the publication at the recent Goodwood Festival of Speed of where the production Supra made its UK debut, that the four-cylinder would have a “much better weight distribution" and a “sharper-feeling [on] turn-in” and that buyers should rather consider the blown four instead of the six-cylinder if they plan on swapping it for Toyota’s iconic 3.0-litre 2JZ that powered the A80 Supra, “as it will be cheaper”.

With a reported wheelbase of 2 470mm, overall length of 4 380mm, height of 1 290mm and width of 1 855mm, the Supra will allegedly tick the scales at 1 496kg, 14kg less than the A80, although it remains unknown as whether the latter figure applies to the 2.0-litre only.

Production of both models will take place at Magna Steyr’s plant in Graz, Austria with sales expected to commence next year.