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    • Edmunds 2013 BMW 650i Gran Coupe N63tu test numbers and comparison to 640i - 1/4 mile in 13.1@109.4, 4533 pound curb weight - Weak? Too heavy?

      The BMW 650i Gran Coupe has the updated N63tu motor which offers 445 horsepower, 45 horsepower more than the standard N63 twin turbo 4.4 liter direct injected V8. Now, a 109.4 mile per hour trap speed is not all that bad but not really all that good for 445 horsepower either. The 13.1 elapsed time is fairly slow though. Especially when compared to the competition, say the Audi S7, which in stock form is capable of almost a full second faster time at 12.2@112.42.


      Part of the problem is the lack of all wheel drive but the main problem seems to be the weight. 4,533 pounds... ouch. The Audi S7 even with its all wheel drive system is about 100 pounds lighter. The X-Drive version of the 650i Gran Coupe balloons to an absurd SUV like 4670 pounds. Efficient Dynamics are at work where again?

      Both the Audi S7 and the Mercedes-Benz CLS550 are quicker and faster than the 650i. Both are lighter and even the 4Matic Mercedes-Benz CLS550 is lighter than the rear wheel drive BMW 650i by about 200 pounds. It isn't just Mercedes building lighter and faster cars than BMW, Audi is too, and both of them are even doing it with all wheel drive. Mercedes-Benz doing it with both rear and all wheel options. Something just isn't right in Bavaria.

      Vehicle: 2013 BMW 650i Gran Coupe
      Odometer: 1,517
      Date: 1/29/13
      Driver: Chris Walton
      Price: $88,095


      Specifications:

      Drive Type: Front engine, rear-wheel drive
      Transmission Type: Eight-speed automatic
      Engine Type: Twin-turbocharged direct-injected V8, gasoline
      Displacement (cc/cu-in): 4,395/268
      Redline (rpm): 7,000
      Horsepower (hp @ rpm): 445 @ 5,500
      Torque (lb-ft @ rpm): 480 @ 5,500
      Brake Type (front): 13.7-inch ventilated discs with sliding calipers
      Brake Type (rear): 13.6-inch ventilated discs with sliding calipers
      Suspension Type (front): Independent multilink, coil springs, self-adjusting variable dampers, lower control arms, self-adjusting active stabilizer bar
      Suspension Type (rear): Independent multilink, coil springs, self-adjusting variable dampers, self-adjusting active stabilizer bar
      Tire Size (front): 245/35ZR20 (95Y)
      Tire Size (rear): 275/30ZR20 (97Y)
      Tire Brand: Dunlop
      Tire Model: SP Sport Maxx GT
      Tire Type: Asymmetrical summer performance run-flat
      As Tested Curb Weight (lb): 4,535


      Test Results:


      Acceleration

      0-30 (sec): 2.3 (2.7 w/ TC on)
      0-45 (sec): 3.6 (4.1 w/ TC on)
      0-60 (sec): 5.2 (5.8 w/ TC on)
      0-60 with 1-ft Rollout (sec): 4.8 (5.3 w/ TC on)
      0-75 (sec): 7.0 (7.6 w/ TC on)
      1/4-Mile (sec @ mph): 13.1 @ 109.4 (13.5 @ 108.7 w/ TC on)


      Braking

      30-0 (ft): 29
      60-0 (ft): 114


      Handling

      Slalom (mph): 66.3 (65.2 w/TC on)
      Skid Pad Lateral Acceleration (g): 0.88 (0.85 w/TC on)

      Db @ Idle: 40.0
      Db @ Full Throttle: 71.1
      Db @ 70-mph Cruise: 60.0

      RPM @ 70: 1,650

      Comments:


      Acceleration:
      Default mode (Comf/Drive) hesitates slightly from a dead stop. Each successive mode makes the car slightly quicker (Sport, Sport+ and DS) but launch delay persists regardless. The time gap between slowest and fastest 0-60 is significant, about a half-second in total. The traction control is effective, but it has a short leash. Once underway, the power builds quickly and carries all the way to the 7,000-rpm redline. I "beat" traction control with a two-footed non-wheelspin launch with Trac off. There's ample cooling as trap speeds remained steady. Upshifts are both fast and smooth, as are matched-rev downshifts. In manual mode, it will allow the engine to bounce off the rev limiter.


      Braking:
      Given that the 2013 BMW 650i Gran Coupe weighs 4,535 pounds, a 114-foot stop from 60 mph is impressive. Distances grew to just 121 feet after four more stops. The pedal remained firm and effective regardless and the car stopped flat and straight.


      Handling:


      Skid pad:
      With Comf mode selected, the Gran Coupe felt heavy and reluctant to probe its grip limits. The throttle would close just shy of the tires howling. The steering feels unnecessarily heavy, too. In Sport+ mode, the car felt less ponderous and it was difficult to detect any ESC intrusion at all, and the results show a measurable improvement.


      Slalom:
      In Comf mode, there's plenty of grip and less body roll than expected. The ESC intrusion is subtle and short-lived and likely keeps the rear from sliding. In Sport+ (with dynamic traction control), the performance envelope is noticeably larger and the stance firmer and more confident. ESC was barely detectable unless I got it really wrong. In either mode, the active-steering option is very disconcerting and doesn't offer expected seat-of-the-pants response.

      2013 BMW 650i Gran Coupe 2013 BMW 640i Gran Coupe
      Curb weight as tested: 4,535 4,292
      0-30 (sec.): 2.3 2.1
      0-45 (sec.): 3.6 3.6
      0-60 (sec.): 5.2 5.7
      0-60 with 1-ft Rollout (sec.): 4.8 5.4
      0-75 (sec.): 7.0 8.6
      1/4-mile (sec @ mph): 13.1 @ 109.4 14.2 @ 95.0
      30-0 (ft): 29 27
      60-0 (ft): 114 110
      Skid Pad Lateral Accel (g): 0.88 0.87
      Slalom: 66.3 64.9

      This article was originally published in forum thread: Edmunds 2013 BMW 650i Gran Coupe N63tu test numbers and comparison to 640i - 1/4 mile in 13.1@109.4, 4533 pound curb weight - Weak? Too heavy? started by Sticky View original post
      Comments 10 Comments
      1. whoosh's Avatar
        whoosh -
        Attachment 27543
      1. TZ04XJR's Avatar
        TZ04XJR -
        Click here to enlarge Originally Posted by whoosh Click here to enlarge

        That's funny
      1. M3_WC's Avatar
        M3_WC -
        Add the fact the 6GC carries a $15k premium over the CLS500 and $9k over the S7.

        Check out a GC last time at the dealer, it is highly over hyped.
      1. Drunkenup's Avatar
        Drunkenup -
        13.1 E/T huh... a 6 cylinder A7 is barely a few tenths slower
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by M3_WC Click here to enlarge
        Add the fact the 6GC carries a $15k premium over the CLS500 and $9k over the S7.
        This as well...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Drunkenup Click here to enlarge
        13.1 E/T huh... a 6 cylinder A7 is barely a few tenths slower
        All style over substance.
      1. cstavaru's Avatar
        cstavaru -
        I hate the fact that the 6-series Gran Coupe is so large and heavy. It looks so good, yet it is a waste of engine power. The automotive industry regulators should impose a 3500lbs limit on cars, this would probably be a very efficient way to reduce overall emissions ad would force manufacturers to put as much emphasis on the weight reduction technologies as they do on the hybrid engines.
      1. MSIZZLE's Avatar
        MSIZZLE -
        I agree with that but the public is hungry for new options especially in this market. More toys = more weight. As far as building cars lighter with the same features will mean more exotic materials and higher prices.
      1. StinkyM's Avatar
        StinkyM -
        We don't need this $#@!. Wifi in a $#@!ing car? I have a house with a computer that works fine. Half these options are useless.
      1. Eryk03's Avatar
        Eryk03 -
        I think it even don't have wifi.
        Very slow results, even A7 3.0 BiTDI is quicker than this. This is crazy.