• Comparing the Porsche 997 GT3 RS 4.0 to the new 991 GT3 - Which is the superior performer?

      The new Porsche 991 GT3 is more technologically advanced than the 997 GT3 RS 4.0. The 991 GT3 ditches the GT1 based flat-6 for a newer direct injected unit, adds a PDK dual clutch transmission, and also features rear wheel steering. The technology update has come with quite a price but is the new the GT3 a better performance car than the top dog 997 GT3 RS 4.0? The previous generation car is the more powerful one quoted at 500 horsepower but it is severely underrated.

      The 991 3.8 liter flat-6 is smaller than the 997 GT3 RS 4.0 liter mill but it revs higher to 9000 rpm. Can the higher redline and quicker shifting PDK gearbox help it overcome its 25 horsepower (on paper) disadvantage? The 991 GT3 not only has less power but it also is the heavier car by 110 pounds.

      Well, the new 991 GT3 is not only faster in a straight line it is significantly quicker around the roadcourse. German publication Auto Bild tested both cars on the Sachsenring and the 991 GT3 crushed the 997 GTR RS 4.0. Here are the laptimes:

      991 GT3: 1:32.97
      997 GT RS 4.0: 1:34.53 min

      Just over 1.5 seconds a lap is a huge improvement. The new car clearly handles better but what about the acceleration figures? The 991 GT3 is the superior performer here as well with an 11.37 second 1/4 mile sprint compared to the 997 GT3 RS 4.0 11.75. Acceleration from 0-200 kph favors the 991 GT3 which accomplishes the task in 11.2 seconds to the 997 GT3 RS 4.0 11.8 seconds.

      Engine fire fiasco aside, the 991 GT3 is simply the superior performance car. Some people do not care about raw numbers and want the purest driving experience possible in which case the GT3 RS 4.0 with its manual transmission will likely a do a better job of satisfying that condition. However, with the standard 991 GT3 beating the 997 GT3 RS 4.0 strictly in the performance sense it makes one wonder just how good a 991 GT3 RS will be.


      Porsche 911 GT3 RS 4.0

      • Weight: 1393 kg
      • 0-100 kph: 3.8 s (with Launch Assistant)
      • 0-160 kph: 7.9 s
      • 0-200 kph: 11.8 s
      • Quarter mile: 11.75 s
      • Flexibility (80-120 kph) in 5th/6th gear: 5.4 s/7.0 s
      • Braking (100-0 kph), warm: 32.1 m (-1.22 G)
      • Braking (200-0 kph), warm: 125.6 m (-1.25 G)


      Porsche 911 GT3 (991)

      • Weight: 1443 kg
      • 0-100 kph: 3.4 s (with Launch Control)
      • 0-160 kph: 7.3 s
      • 0-200 kph: 11.2 s
      • Quarter mile: 11.37 s
      • Flexibility (80-120 kph) in 5th/6th gear: 5.6 s/7.1 s
      • Braking (100-0 kph), warm: 32.2 m (-1,22 G)
      • Braking (200-0 kph), warm: 119.1 m (-1,32 G)
      This article was originally published in forum thread: Comparing the Porsche 997 GT3 RS 4.0 to the new 991 GT3 - Which is the superior performer? started by Sticky View original post
      Comments 13 Comments
      1. 5soko's Avatar
        5soko -
        Nice comparo! Been waiting for one of these, and pretty well summarized. The 997 4.0 engine and manual, and more hardcore RS setup might be a winner for alot of owners, but hard to deny that high revving motor, faster pdk, and quicker all around package in a less hardcore setup in the 991
      1. leveraged sellout's Avatar
        leveraged sellout -
        If anyone knows how to make their previous generation cars feel like outdated antiques, it's Porsche. Love it. 11.37 in the quarter? Holy hell. That's quicker than I thought it would be. These things are monstrous...and yeah the RS should be just sublime. Honestly, with this much performance in the standard car, you have to wonder how much more you could need for a car you'd likely spend at least half the time on the street with.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        If anyone knows how to make their previous generation cars feel like outdated antiques, it's Porsche. Love it. 11.37 in the quarter? Holy hell. That's quicker than I thought it would be. These things are monstrous...and yeah the RS should be just sublime. Honestly, with this much performance in the standard car, you have to wonder how much more you could need for a car you'd likely spend at least half the time on the street with.
        I know it flies in the face of convention but I'd love for someone to boost a GT3.
      1. leveraged sellout's Avatar
        leveraged sellout -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I know it flies in the face of convention but I'd love for someone to boost a GT3.
        With the old ones it was, well not easy but you had a good place to start with that engine. Not sure how it would work with these, probably easier to just swap a turbo engine into one. I'm sure there will be a GT2 which will be pretty much this car with turbos. For people that don't fear death. Although the new chassis seems to be so well-behaved that's probably not true anymore.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by leveraged sellout Click here to enlarge
        I'm sure there will be a GT2 which will be pretty much this car with turbos
        They never are. They are pretty much RWD 911 turbos.
      1. leveraged sellout's Avatar
        leveraged sellout -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        They never are. They are pretty much RWD 911 turbos.
        True. I'm hoping it won't be this time. Otherwise yeah a boosted GT3 would be probably the most fun you could have with 4 wheels.
      1. Kjeronimo91's Avatar
        Kjeronimo91 -
        a gt2 is a gt3 boosted pretty much./...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Kjeronimo91 Click here to enlarge
        a gt2 is a gt3 boosted pretty much./...
        Um, no it isn't. It's a rear wheel drive 911 Turbo pretty much.
      1. Group.america's Avatar
        Group.america -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        I know it flies in the face of convention but I'd love for someone to boost a GT3.
        997 GT3 RS wins because the other car catches fire on the back straight on the 1st lap Click here to enlarge
      1. Group.america's Avatar
        Group.america -
        Click here to enlarge Originally Posted by 5soko Click here to enlarge
        Nice comparo! Been waiting for one of these, and pretty well summarized. The 997 4.0 engine and manual, and more hardcore RS setup might be a winner for alot of owners, but hard to deny that high revving motor, faster pdk, and quicker all around package in a less hardcore setup in the 991

        Has anyone here been able to get a test drive in the 991 GT3 (before or after the call back)... it is impossible even in NY to find one... so you pretty much have to buy it blind... the PDK with no 6MT option is a big turn off (on this car only) for me
      1. Sticky's Avatar
        Sticky -
        Getting a 991 GT3 test drive is going to be VERY hard unless that dealer knows you well.
      1. Group.america's Avatar
        Group.america -
        These one track tests and one offs are also a bit misleading and prone to "variance"... like the hilarious Motor Trend tests where they seem to get the result they pre-ordained

        Be interested to see the times after 30 laps of the same circuit and others
      1. Sticky's Avatar
        Sticky -
        I'd like to see several laps with different skilled drivers.

        I really think these magazines could do a hell of a lot better.