The 2023 BMW M5 CS delivers serious tuned performance on the dyno, producing 799HP and 1125Nm with custom downpipes, a bigger ...

This BMW F87 M2 is transformed with a complete Stage 2 Plus performance package featuring a catless downpipe, CSF intercooler ...

Everyone and their dog knows the S58 twin-turbo I6 from the M division is underrated like crazy. BMW claims the G87-generation M2 produces 453 horsepower and 406 pound-feet (550 Nm), but dyno testing ...

Prior to joining TopSpeed, John held senior editorial positions at Autoblog and Winding Road, with his work also appearing on Motor1, Hagerty, Carsfancy, Autoline After Hours, and other outlets. John ...

We’re so used to seeing huge numbers being put out by turbocharged plants that when someone says his/her car put down 350 HP at the wheels on a dyno we’re not all that impressed. However, naturally ...

Sebastian's spare time is spent watching Formula 1, fiddling with his friends' cars (usually German money pits), and soaking up as much architectural amazement and engineering excellence as he can ...

Here we go again: a new engine in a new 3-series, and just like last time, the Internet blows up with rumors that the Bavarians have underrated the power output. As always, there's only one way to ...

A recent dyno run of the new Toyota Supra revealed that it has more power than the Japanese car manufacturer claims and we now have reason to believe that the Supra’s sibling, the Z4 M40i, also has ...

Just as the sun rises and sets, BMW publishes conservative horsepower and torque figures. The German owner of a new M4 CSL put their car on the dyno and got an astonishing result—596 hp and 531 lb-ft ...