Close

    • Lamborghini Urus dyno shows it is underrated and making 700+ horsepower, Trackhawk output comparison - +45 whp, 52 wtq gains w/ Fabspeed sport cats

      The Lamborghini Urus twin turbocharged 4.0 liter V8 is rated at 641 horsepower and it is supposed to be the baddest new performance SUV on the block. The twin turbo V8 is tweaked by Lamborghini for the Urus from the new Porsche architecture shared by VAG (Volkswagen Auto Group).


      Porsche rates the motor at 550 horsepower in their Panamera Turbo application and 541 horsepower in the Cayenne Turbo. In the Urus, Lamborghini is making more power at the wheels that either of the aforementioned Porsches have at the crank.


      Calculating just how much crank horsepower 575 all wheel horsepower translates to is not not as simple as it once was. The rule of thumb for automatic all wheel drive vehicles was 25% losses. That would put the Urus at 766 crank horsepower.

      With modern automatics being more efficient let's say losses are 20% even with all wheel drive. Thats puts the Urus at 718 horsepower. If you want to be more conservative and go to 18% that still works out to 701 crank horsepower.

      Yes, the Urus is underrated it is simply an argument as to how underrated it is. What does a stock 707 horsepower Jeep Trackhawk show on a Dynojet? The same 575 to the wheels:


      The blown Jeep is actually making much less torque than the turbocharged Urus. You could argue the Jeep is a bit underrated as well just not to the degree the Urus is. There is no denying the Lamborghini SUV is making over 700 at the crank.

      Where things get really interesting is with Fabspeed sport cats:


      With no changes to the tune the Urus V8 picks up massive gains through the curve. At 3000 rpm you see another 52 lb-ft of torque at the wheels. That is huge for just changing the primary cats to 200-cell sport cats. It is somewhat surprising the factory primaries are so restrictive.

      With an ECU tune we will see 800+ horsepower out of these with bolt ons. It's a monster.

      This article was originally published in forum thread: Lamborghini Urus dyno shows it is underrated and making 700+ horsepower, Trackhawk output comparison - +45 whp, 52 wtq gains w/ Fabspeed sport cats started by Sticky View original post
      Comments 3 Comments
      1. Urmom's Avatar
        Urmom -
        Indeed
      1. SpeedLimit?'s Avatar
        SpeedLimit? -
        Great comparison @Sticky, i wasn't even thinking about the trackhawk but the fact that it runs the same zf transmission makes it a great reference point. I'm eager to see what bmw pushes the s63 to in the next x5m.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
        Great comparison @Sticky, i wasn't even thinking about the trackhawk but the fact that it runs the same zf transmission makes it a great reference point. I'm eager to see what bmw pushes the s63 to in the next x5m.
        I think we might see similar figures out of the X5M except for a lot less money.