Insideline recently strapped the 2012 328i with its turbo 4 cylinder N20 engine on the dyno and achieved even higher at-the-wheel power than the EAS Dyno we reported on recently.
On 91 octane and a dynojet, this F30 328i achieved
240hp / 257 lb-ft torque at the wheels
Assuming a 16% drivetrain loss for the sake of argument, this would equal approximately
286hp / 306 lb-ft torque at the crank. Compare this to the F30 328i's factory rating of 240hp / 255lb-ft torque at the crank. The 328i could be underrated by as much as 46 hp and 51 lb-ft torque. Impressive indeed!
Compare this to the
EAS dyno which achieved 226hp / 230lb-ft torque at the wheels.