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2013 BMW M5 may have more horsepower than reported

Posted Sep 7th 2012 2:15PM


With the 2013 BMW M5 finally going on sale, we definitely saw this coming. BimmerPost recently got a hold of an engine dyno run for the new M5, and is reporting that the car's twin-turbo V8 is "severely" underrated.

Officially, the M5's 4.4-litre V8 is rated at 560 horsepower and 500 pound-feet of torque, but the dyno graph reveals numbers at the rear wheels to be 527 hp and 476 lb-ft in completely stock form. While the idea of the engine being underrated is just an assumption, the general rule of thumb is a 15-per cent drivetrain loss – if accurate, the new M5's losses would be just six per cent. Using the 15-per cent rule, the 2013 M5 would lay down 476 hp at the wheels.

The idea of BMW underrating its engine outputs is nothing new. Earlier this year, the new 328i show some impressive numbers of its own.

Click here for additional images and a short video of the mighty BMW M5 in action.

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Image Credit: Copyright 2012 Matt Davis / AOL

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Autoblog Short Cuts: 2012 BMW M5


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Dr. Cheap

The 2013 Audi S8 is twice the daily driver road car, for only 10k more. Audi like bmw under rated the v8 turbo by almost 80hp. The M5 has shody orange peel paint, and uneven gaps betwen body panels.

November 30 2012 at 8:28 PM Report abuse rate up rate down Reply

BMW may be the only manufacturer that underestimates its products output. Makes me think that its about time that I try one of their products. Of course it would have to be used at the prices they command.

September 07 2012 at 5:34 PM Report abuse rate up rate down Reply