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BMW says the S58 twin-turbo inline-six in its 2023 M2 makes 453 hp and 406 lb-ft of torque at the crank. A dyno test shows the company is likely underrating those numbers, and the M2 is more powerful than we thought.
IND Distribution, a performance parts firm in Illinois, got its hands on a new M2 to see just how much power the two-door coupe could lay down at the wheels. The best of three runs showed 464.59 hp and 412.85 lb-ft of torque at the wheels—more hp and torque than BMW quotes at the crank.
On its website, IND factors in a drivetrain loss of 15 percent for drivetrain losses, which suggests a true crank output of 547 hp and 486 lb-ft of torque—a whole lot more than what BMW claims. Even if the losses were more like 5 to 8 percent, figures which have been cited as more typical of modern drivetrains, it’s very likely the M2 is making close to 500 hp.
BMW underrating its car’s horsepower and torque numbers isn’t uncommon. Back in 2021, IND Distribution was able to squeeze similar numbers out of the base M4. The 543-hp M4 CSL, which uses a more powerful version of the S58, threw down a number closer to 600 horses on a dyno last year. And let’s not forget about the Supra, a BMW-built sports car with a BMW engine that appeared underrated in a dyno test held by Car and Driver.
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