Toyota has called the 2021 Supra turbocharged 3.0 liter inline-six cylinder engine which generates a high 382 horsepower and 369 LB-ft of torque at its peak all which are based on written specifications of the luxury sport car meanwhile, Cars & Drivers decided to take the Dyno for a long spin where they found out that it's in fact capable of more after all.
The test drive showed a bone stock example made 388 horsepower and 421 pound-feet of torque at the wheels which is like 400 hoursepower at the crank. The accompanying video further explains this rather than text.
The testers made use of dynamometer which can measure the torque of engines and once the torque is determined, you can then calculate easily the horsepower. The particular Dynojet model they used measures power at the wheel instead of the engine's flywheel. For comparison, the less powerful 2020 Supra is capable of hitting 60 mph in a mere 3.7-seconds and complete the quarter-mile in 12.2 seconds at 113 mph. So, you can safely say that the 2021 model smashes those numbers.