A little-known supercar project promises a quad turbo V16 with 5,000 horsepower, but reality has not been as straightforward as the claims.

This video features a dyno test of the BMW F70 M135i, measuring real-world output against the manufacturer’s claimed power figures. The test highlights drivetrain efficiency and overall performance.

America’s hypercar, boasting 1,817 hp from the factory, just proved that the Sealey, Texas, carmaker has every reason to claim a seat at the 300-mph high table ...