Skip past the one-minute mark to get to the dyno action, then listen to the big V-8 as it spins up the roller on its way to one heck of a photogenic set of curves.
With torque nearly flat from 2,500 rpm to redline and horsepower that builds like a tsunami, the figures show the rated 505-horsepower is perhaps a bit conservative, as this dyno run pulled 455 horsepower and 420 pound-feet of torque at the wheels.
That’s just 10% drivetrain loss if the rated 505 horsepower at the crank is correct. The torque figure likewise reflects either rather small drivetrain losses or a slight underrating of the engine, with just 13% of the 481 pound-feet of torque at the crank lost on its way to the wheels.
Of course, this is just one car and one dyno—the figures may not mean much at all in absolute terms. But as a first data point, it looks like the Z/28’s powertrain is more than ready to deliver.