Inside Line straps the BMW 1 Series M to a dyno – Click above to watch video after the jump

It's no secret that manufacturers sometimes underrate horsepower and torque figures for certain high performance models. This practice has been going on since the muscle car wars, and we don't see it stopping anytime soon. Inside Line wanted to find out what the 2011 BMW 1 Series M is putting down for power, so rather than rely on the manufacturer's information, the IL crew took a trip to the local dyno.

In case you'd forgotten, the 1 Series M is rated at 335 horsepower and 332 pound-feet of torque under normal operation, but an "overboost" function increases turbo pressure allowing the engine to make 369 pound-feet of torque for brief periods.

What happened when Inside Line hooked the 1M up to a rolling road? Let's just say BMW is keeping the underrated power game alive. Click past the jump to watch the clip and see what we mean.

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