2010 BMW 550i Gran Turismo Road Test Specs | Edmunds.com
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2010 BMW 5 Series Gran Turismo - Road Test Specs

2010 BMW 5 Series Gran Turismo Hatchback

(4.4L V8 Twin-turbo 8-speed Automatic)

Vehicle

Model year2010
MakeBMW
Model5 Series Gran Turismo
Style550i 4dr Hatchback (4.4L 8cyl Turbo 8A)
Base MSRP$64,725
Options on test vehicleSport Package ($4,200 - includes 20-inch wheels with performance tires, leather sport steering wheel, multicontour seats, Shadowline exterior trim); Integral Active Steering ($1,750); Cold Weather Package ($950 - includes heated steering wheel, heated front and rear seats); iPod and USB Adapter ($400).
As-tested MSRP$74,025

Drivetrain

Drive typeRear-wheel drive
Engine typeTwin-turbocharged, direct-injected, V-8
Displacement (cc/cu-in)4,395cc (268 cu-in)
Block/head materialAluminum/aluminum
ValvetrainDouble overhead camshaft
Compression ratio (x:1)10.0
Redline (rpm)6,700
Horsepower (hp @ rpm)400 @ 5,500
Torque (lb-ft @ rpm)450 @ 1,750
Transmission typeEight-speed automatic
Transmission and axle ratios (x:1)I = 4.70, II = 3.13, III = 2.10, IV = 1.67, V = 1.29, VI = 1.00, VII = 0.84, VIII = 0.67, R = 3.30, FINAL = 3.08

Chassis

Suspension, frontDouble wishbone
Suspension, rearMultilink
Steering typeSpeed-proportional power steering
Steering ratio (x:1)Variable - overall = 19:1
Tire brandGoodyear
Tire modelExcellence
Tire typeAsymmetrical, run-flat
Tire size, front245/40R20 99Y
Tire size, rear275/35R20 102Y
Wheel size20-by-8.5 inches front -- 20-by-10 inches rear
Wheel materialAlloy
Brakes, frontVentilated disc
Brakes, rearVentilated disc

Track Test Results

Acceleration, 0-30 mph (sec.)2.0
0-45 mph (sec.)3.5
0-60 mph (sec.)5.3
0-75 mph (sec.)7.4
1/4-mile (sec. @ mph)13.4 @ 105.5
0-60 with 1 foot of rollout (sec.)5.1
Braking, 30-0 mph (ft.)28
60-0 mph (ft.)112
Slalom, 6 x 100 ft. (mph)65.0
Skid pad, 200-ft. diameter (lateral g)0.85
Sound level @ idle (dB)33.8
@ Full throttle (dB)75.6
@ 70 mph cruise (dB)62.6

Test Driver Ratings & Comments

Acceleration commentsNo matter how you launch it, the 550i GT is quick; however, we found the sweet spot in Sport Plus with DSC off and virtually no wheelspin. It took three attempts to "beat" Sport Plus with DSC on, however, so the sysem is well-calibrated.
Braking ratingExcellent
Braking commentsMedium-firm pedal with little idle stroke and virtually no fade until the fifth stop. How does BMW do this with single-piston calipers and a 4,800-pound vehicle?
Handling ratingGood
Handling commentsSkid pad: With DSC off, the GT tiptoes in understeer. Decent grip, and when Sport Plus mode is selected, the steering feels (more or less) linear and "normal." With DSC on and "Normal" mode selected, steering input (and effort) are decreased. DSC first applies brakes, then closes throttle to quell understeer. Slalom: In Normal mode with DSC on, the yaw response is incongruous with the minimal steering input. That said, the DSC is perhaps one of the best I've tested in that it makes the GT go EXACTLY where the steering tells it to go without the usual overcorrections or stumbling of other systems. With DSC off, the GT doesn't feel as massive as it truly is. Balance is remarkably neutral with slight understeer on the limit.

Testing Conditions

Elevation (ft.)421
Temperature (F)51.19
Relative humidity (%)50.56
Wind (mph, direction)2.2

Fuel Consumption

EPA fuel economy (mpg)15 city/21 highway/17 combined
Edmunds observed (mpg)15
Fuel tank capacity (U.S. gal.)18.5

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)4,938
Curb weight, as tested (lbs.)4,865
Weight distribution, as tested, f/r (%)49.2/50.8
Length (in.)196.8
Width (in.)74.8
Height (in.)61.4
Wheelbase (in.)120.7
Track, front (in.)63.4
Track, rear (in.)65.1
Turning circle (ft.)40.0
Legroom, front (in.)41.4
Headroom, rear (in.)39.0
Shoulder room, front (in.)59.3
Shoulder room, rear (in.)57.7
Seating capacity5
Cargo volume (cu-ft)15.5
Max. cargo volume, seats folded (cu-ft)60.0

Warranty

Free scheduled maintenanceNot available

Safety

Front airbagsStandard
Side airbagsDual Front
Head airbagsFront and rear
Knee airbagsDual Front
Antilock brakesFour-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlTraction control
Stability controlStability control
Tire-pressure monitoring systemTire-pressure monitoring
NHTSA crash test, driverNot Tested
NHTSA crash test, passengerNot Tested
NHTSA crash test, side frontNot Tested
NHTSA crash test, side rearNot Tested
NHTSA rollover resistanceNot Tested
IIHS offsetNot Tested
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