Bulgarian tuner Prospeed has built a replica of Audi's fabled S1 World Rally Championship mauler out of a garden-variety Audi Coupe, and it's a convincing-looking beast. Helping in its bid for authenticity is genuine Group B horsepower: 800 ponies, to be exact. It won the Bulgarian Hillclimb Championship last year, and it recently ran up an incline at the Kyustendil Hillclimb, part of this year's championship series.

The list of modifications made to the donor car are intense, and so is the sound of the final product, singing like a crazed goldfinch as driver Nikolay Zlatkov races to the top of the hill. You can have a watch – and a listen – in the video below.



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    • 1 Second Ago
  • 35 Comments
      Kwijiboz
      • 2 Years Ago
      When on a family driving holiday through Europe as a kid, my dad sneaked me away to trudge through a forest somewhere to get close to a rally event. I remember it all seemed very sneaky, skirting a few officials to find good spot, all the while in my mind expecting racers along the lines of the home-built Datsuns I'd once watched in Australia. Then, a menacing sound, like some awoken mega-dinasaur in the distance had us all looking down the dirt road expectantly...except it didn't come. Instead, the sound just got louder, and louder, and louder....getting impossibly loud now.... This went on for what seemed like minutes. We were all thinking maybe we'd found the wrong track, as the car just didn't appear..... I will never, EVER forget the sheer terror I felt, right to the core of my soul, at the visitation from hell in the shotgun blast right before my eight-year-old eyes that was the Audi Quattro. Actually, we didn't even see it, more just a supernatural shape-shifting monster, who through stones. I'm pretty sure I was still crying the next day!
        Zeus
        • 2 Years Ago
        @Kwijiboz
        Good story. I remember watching top fuel when I was a kid and feeling the same terror.
        Kwijiboz
        • 2 Years Ago
        @Kwijiboz
        Hmmm...'threw' stones. I gots the trembles : /
      americanjunglist
      • 2 Years Ago
      My absolute favorite thing on four wheels.
        AcidTonic
        • 2 Years Ago
        @americanjunglist
        I wouldn't be so into the Evo if this car was still produced and sold. I like it better but it's simply not available anymore. Modern Audi's have gone soft in the small car AWD segment. The only thing I want from them is the R8 or an RS4 and that's a different class altogether. So Evo it is.... One of the few Group B/N cars available in the US. If I could find a nice quattro I would trade my Evo in a heartbeat.
          Zeus
          • 2 Years Ago
          @AcidTonic
          Today while I was out I saw some high school kid in an EVO with a body kit and exhaust. It was immediately after watching this video again and I stopped and thought "that poor child...if he only knew about this S1 Prospeed Car he wouldn't have purchased that stupid body kit...or that damn muffler."
      Zeus
      • 2 Years Ago
      I looooove the sound of anti lag systems. BOOM!
      • 2 Years Ago
      insane car and sound
      AcidTonic
      • 2 Years Ago
      I'd take this over a GT500, Corvette, or Viper any day. Power AND Traction. Not trying to look good or sound good, just purely focused on performance. My kind of car.
        Zeus
        • 2 Years Ago
        @AcidTonic
        True, but something makes me think this is a little bit more money than a corvette. Just a hunch...
          Kris
          • 2 Years Ago
          @Zeus
          It cost them 197 000 € to build this car. Keep in mind it is one off racing car and the donor chassis is old Audi Coupe rally car that they paid more than they should've. As far as I know the car was raced on macadam and took some beating, the chassis needed a lot of work.
          Zeus
          • 2 Years Ago
          @Zeus
          Hey Kris. So when you factor in upkeep on this car say for a season of hill climbing and racing I would imagine this car costs easy 25,000-30,000 € a year to compete with. At current exchange rates 197 000 € is ~ $242,000. Pretty pricey, but very unique piece of equipment.
        k_m94
        • 2 Years Ago
        @AcidTonic
        While I agree wholeheartedly (who wouldn't want a super iconic rally car with 800hp?), such a comparison to vastly newer, cheaper, and streetable RWD sports cars is irrelevent. I might as well say I'd take Aryton Senna's F1 car over an Evo X.
      Kris
      • 2 Years Ago
      Niki, you really show race at Pikes Peak. Won't be cheap, but it's gonna be awesome! Think about it.
      Bradford Guy
      • 2 Years Ago
      The Audi s1 is truly one of of the best sounding and awesome cars of all times . In the hands of a seasoned veteran (you know who ) the demon is truly unleashed !!! Ps all wheel drive cars will push in corners , wouldn't you with about 400 ponies to the front wheels !!!!!!!!!!!!😁
        Zeus
        • 2 Years Ago
        @Bradford Guy
        Setup setup setup. It's been a while since I've really studied awd systems, but you can transfer the torque to the front wheels either fixed or on the fly with modern computers. My guess is they set this car to transfer about 25-35% of the power to the front wheels depending on grip conditions.
          Zeus
          • 2 Years Ago
          @Zeus
          Thanks for the heads up Kris, I wasn't sure what they were using for the setup of this car. My guess would be 40/60 judging by watching the car. Even if it was 50/50 it's not going to be too prone to understeer if they have it setup correctly. This car is a short wheelbase too so it helps in the rotation of the car as well. I figured it was mechanical, but it's been a while since I've studied AWD systems in depth.
          Kris
          • 2 Years Ago
          @Zeus
          Actually the transmission comes from Audi RS4 so the center is a good old Torsen. No computers are involved in the torque bias. I don't remember the default ratio on this particular car, but it's either 50/50% or 40/60%.
          ckm
          • 2 Years Ago
          @Zeus
          @kris Audi never used torsens in competition due to 'spydering' - basically at adhesion limits, the torsen rapidly shift power front to back to front to back, making the car un-controllable. Instead, Audi used manual locking front/center/rear diffs.... The is a video on the history of Audi in WRC where Walter Rohrl talks about it. This doesn't usually happen on road cars as they are never really at the limit, although I have felt it on very, very icy roads at speed.
      Drakkon
      • 2 Years Ago
      Glad to see the driver's is gentle and babies that car.... What a riot. Almost ate the wall on the start.
      Chris
      • 2 Years Ago
      love it. gave me goose bumps
      vedi123
      • 2 Years Ago
      even better: http://www.youtube.com/watch?v=fA3-wXXW6ok&feature=related
      Kris
      • 2 Years Ago
      Niki, you really should race at Pikes Peak. It won't be cheap, but it's gonna be awesome! Think about it.
      beefchow
      • 2 Years Ago
      Whats the high pitched squeaking that sounds like ferrets being ground up in a blender...?
        Rob
        • 2 Years Ago
        @beefchow
        Blow off valve.
          Baylok
          • 2 Years Ago
          @Rob
          No BOV. That sound is compressed air hitting the intake impeller on the turbo when he lifts off the throttle. Very bad for the turbo. Shouldn't matter really since turbos get replaced at every race.
          Zeus
          • 2 Years Ago
          @Rob
          Uh...no...this is not wastegate flutter. It is the blow off valve.
          Simon
          • 2 Years Ago
          @Rob
          Wastegate flutter actually.
          Zeus
          • 2 Years Ago
          @Rob
          If there is no BOV there has to be some kind of bypass valve for the compressed air to evacuate from. It would be incredibly daft and a total waste of money to just rebuild the turbo every race because race car. If an engine builder came to me and said hey I built you a turbo motor but by the way it has no bypass valve and no blow off valve, I would do 1 of 2 things: 1) Look at him like he is a total idiot 2) Laugh until I cried and then say "you're joking right?" If it was anything other than a joke I would tell him to get lost. Hard to believe these guys are operating this motor without the use of something to discharge the air in the pipes before the throttle plate.
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