Automobile mag went back to the dynometer and tested the 335i again, this time under cooler conditions that would yield better figures. The 335i managed to get 285hp, then 282hp, and finally 287hp, which is even more impressive than the last unit. Finally, they found one case where the 335i peaked at almost 300hp at the wheels, which puts actual output at close to 375hp. It looks like BMW engineers have seriously underrated this engine.
[Source: Automobile Magazine]