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    • Automobile reporting BMW to drop N52 6 cylinder in Z4 in favor of turbo 4 cylinder

      Well, it would seem BMW is phasing out yet another naturally aspirated powerplant in one of their models. Not much of a surprise to us, we know bimmer boost is the future. There are very few details on the new poweplant other than it will be the new base motor and should likely be the replacement for the N52 across the board in the future. Rumors are around 200 horsepower but we will know more when the engine is officially unveiled. It would also not surprise us if this motor was in Mini models as well.

      This article was originally published in forum thread: Automobile reporting BMW to drop N52 6 cylinder in Z4 in favor of turbo 4 cylinder started by Sticky View original post
      Comments 30 Comments
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by RLSinCO Click here to enlarge
        I guess we will have to see once we get official specs on the motor. Thanks for the perspective on the tiny turbo, I can see where it would spool up much faster to help with low end torque, but my experience with a T4 (I owned an Audi A4 1.8T Quattro) was the "off the line" experience. No matter how small a turbo is, it is tough to overcome lack of torque from a standstill. That initial get up and go was so weak on the Audi that I grew to literally hate that car. Once you were going, pickup was no issue. Oh, I should mention that the Audi was AT transmission, which of course greatly exacerbates the problem...

        For example, let's say you are in the left turning lane, looking to make a left turn through oncoming traffic. Man, I had to wait for a huge gap (not that I am reckless and like to squirt through the tiniest gap) but there was more than one occassion where I would initiate the left turn, only to say "Crap I need to get going here"!!!

        And, I certainly agree: It will be much easier for aftermarket gains...I wonder if this isn't becomming a consumer trend: you buy something with the manufacturer's (and yours) intent to increase performance (I know it has been this way for cars for a long time)? Take CPUs on computers for instance - both Intel and AMD sell chips fully expecting them to be overclocked...
        That's funny because I used to drive my girlfriend's B5 A4 1.8T a lot (auto) with an APR Stage 1 flash. Yes, the lag was bad, as was the shift time, and that motor did not have enough displacement and a high enough compression ratio to be fun off the line without brake launching it.

        I guarantee this motor will be different though. Have you driven a N54? This 4 cylinder will likely have DI, so it will have a high compression ratio for a turbo car, meaning it will have more off-boost torque and also will spool the turbo faster. It also has 200cc more displacement and likely a better head, intake and exhaust manifold design.

        Pair this with a DCT or manual and I bet it will be faster than the old NA 6 and definitely have punchier low-end torque, if not then with a few after-market parts.
      1. Sorena's Avatar
        Sorena -
        RLsinCO we are talking about Bmw , not Audi
        even though Bmw engineers went for vacation for a long time recently , Bmw is still one of the finest engine makers
      1. RLSinCO's Avatar
        RLSinCO -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        I guarantee this motor will be different though. Have you driven a N54? This 4 cylinder will likely have DI, so it will have a high compression ratio for a turbo car, meaning it will have more off-boost torque and also will spool the turbo faster. It also has 200cc more displacement and likely a better head, intake and exhaust manifold design.

        Pair this with a DCT or manual and I bet it will be faster than the old NA 6 and definitely have punchier low-end torque, if not then with a few after-market parts.
        You are probably right. That is what is so great about these forums - people have knowledge to share and you learn!

        @HeroSina - I referenced the Audi for a point of comparison. FYI I have also owned another 4T - that found in the 1990 Mitsubishi Eclipse 2.0 Turbo...but that was a manual transmission so if there was turbo lag, it was rendered moot.
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by HeroSina Click here to enlarge
        RLsinCO we are talking about Bmw , not Audi
        even though Bmw engineers went for vacation for a long time recently , Bmw is still one of the finest engine makers
        Audi has excellent engineering, which I guess really just points back at Volkswagen, but it's hard to make a off-the-line torque monster from a older, port-injected low-compression 1.8L motor.
      1. fundahl's Avatar
        fundahl -
        Click here to enlarge Originally Posted by RLSinCO Click here to enlarge
        FYI I have also owned another 4T - that found in the 1990 Mitsubishi Eclipse 2.0 Turbo...but that was a manual transmission so if there was turbo lag, it was rendered moot.
        The 4g63 is one of my all time favorite inline-four motors. You can make those old Eclipses INSANELY fast for cheap!
      1. Sorena's Avatar
        Sorena -
        ^i got it
      1. RLSinCO's Avatar
        RLSinCO -
        I have the coolest picture from my Eclipse:
        At 99,999 miles I pulled over, and got my camera out and took a picture at a standstill. Then I hammered it, and took another picture exactly at 100,000 miles at 100 mph!

        I'll have to dig that picture up and post it, it was cool :-)

        My wife was in the car, and was $#@!ing the whole way too, LOL But was was cool about it, and likes the picture too!
      1. lughed's Avatar
        lughed -
        From the looks of that setup, that looks like a transvered engine for front wheel drive. Wouldnt be hard the give it a 90* turn tho.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by RLSinCO Click here to enlarge
        I have the coolest picture from my Eclipse:
        At 99,999 miles I pulled over, and got my camera out and took a picture at a standstill. Then I hammered it, and took another picture exactly at 100,000 miles at 100 mph!

        I'll have to dig that picture up and post it, it was cool :-)

        My wife was in the car, and was $#@!ing the whole way too, LOL But was was cool about it, and likes the picture too!
        I missed this, we need to see the picture.
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by SlicktopTTZ Click here to enlarge
        The 4g63 is one of my all time favorite inline-four motors. You can make those old Eclipses INSANELY fast for cheap!
        Too bad the car was god awfully ugly, fast; but oogly.