1M Hits the Dyno With Impressive Numbers

At the wheel Insideline saw 331 hp & 362 lb-tq. Those are huge numbers considering they ‘re taken at the wheel. For example Insideline did the same test on a N54 135i a few years back and got 285hp and 291lb-tq restively (which you can see here) . You can see the full graph after the break.

 You can check out the entire story and the exhaustive testing procedures over at Insideline.

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  • Adam

    Well I believe Gabe, you and Michael both said early on that this car made more power than what BMW was letting on and that their performance estimates were conservative.

    But I must say… wow, and mind you this is a 3.0 set aside the two fist sized turbo’s.  So if they now are getting near 400hp now with the N54, imagine what a few years of engineering and creativity can do for a new M inline-six.

  • goat

    Those are mighty impressive numbers! I was expecting BMW under-rated it by say 30hp… so at the crank 360hp… but they are dynoing that at the wheels… with 10% drivetrain loss that means peak hp is right around 400hp crank… since drivetrain loss is likely a bit higher than that, the “true” crank rating of this motor (admittedly in overboost mode) is comfortably over 400hp. Mighty impressive even compared to aftermarket tunes for the N54, proving once again to some of those that called foul early on that BMW came up with much more than a “135i with a tune”. One gripe though is that it is too bad to see the hp level off so early in the rev range (and the torque drop precipitously)… I was hoping for more of a top-end rush with this variant of the turbo-six at least but perhaps that will be left for future generation turbocharged M cars? 

    • 03Beastcharmer

      Goat – Peat Horsepower is 331, so if you are assuming 10% loss than it’s putting out 368Hp.  The 362 number is for Torque.  Assuming 10% driveline loss, 362 Hp would result in a 400 hp engine.

      • goat

        Thanks for the proofread… I did too quickly look at the torque number when doing “dangerous” mental math lol!  🙂   

        OK, so my initial thoughts were about right after all… and makes more sense… under-rated by 30-40hp. Still very impressive, but more in line with some aftermarket tunes. 

    • 03Beastcharmer

      Goat – Peat Horsepower is 331, so if you are assuming 10% loss than it’s putting out 368Hp.  The 362 number is for Torque.  Assuming 10% driveline loss, 362 Hp would result in a 400 hp engine.

  • oal

    guys, i haven’t been following the developments for a while but….. doesn’t the alpina b3s biturbo also feature the n54? if yes (actually regardless), that thing is now rated at 400hp (at the crank of course). and alpina product is basically an official bmw product. 

    so there you have it, a non-m bmw product, with all the warranties (true, no manual offered), featuring 3.0l inline 6, turbocharged, rated much higher than this n54…. so, if we focus on engine only, and on related numbers, neglecting the details of power delivery (anyone has more info, dyno test of that alpina engine?), the 1m engine isn’t that impressive any more, is it? 

    m could have done much more, heck, if they didn’t know how to, they could have asked guys from buchloe for advice, but they chose not to. and that, right there is disappointing to me. this car could have had even larger heart, even without the bespoke engine, but someone at bmw decided against it.

    • It’s got 355 hp at the wheel and 369 torques

    • 03Beastcharmer

      Oal – Everyone who has driven the car says it’s not lacking in power.  It doesn’t need to have 400hp.  I’m sure ///M could have made it with 400hp, but if their focus was on making a drivers car, it would appear they didn’t need to make it have 400hp given that it’s so much lighter than an M3.

      This article is just adding proof to the belief that BMW under rated the engine output so that they could say it’s the same as the z4iS and didn’t have to re-federalize the engine.

      “it’s the same engine” wink wink, nudge nudge – let the car into the US.

  • oal

    yes, it really seems that b3s biturbo features a modified n54 with mahle pistons, raised compression, revised air intake and air filter, completely new exhaust, and high-performance cooling system…. no mention of overboost function though, but 400hp at 6000rpm, 397lbs-ft at 4500rpm, 300lbs-ft starting at 1300rpm (this last number is probably meaningless). all at the crank…. offered in a 3 series touring body too….but the euro listed price hurts. one needs to take into account the large portion of the price are high-quality interior components as well. wonder what prevented m from dropping n54 in this form into 1m. lack of appropriate manual transmission perhaps?

  • sackboy

    Yea BABY !!!   What a sound, also! Good job! sackboy

    • sackboy

      After 3,600 miles, I STILL think it is a Fantastic ENGINE- but the TOTAL package is just about SPOT ON !!  sackboy