2012 Jeep Grand Cherokee SRT8 Road Test Specs | Edmunds

2012 Jeep Grand Cherokee - Road Test Specs

2012 Jeep Grand Cherokee SUV

(6.4L V8 4x4 5-speed Automatic)


Year Make Model2012 Jeep Grand Cherokee SRT8 4dr SUV 4WD (6.4L 8cyl 5A)
Vehicle Type4WD 4dr 5-passenger 4dr SUV
Base MSRP$54,470
Options on test vehicleMineral Gray Metallic Clearcoat; Luxury Group II ($2,995 -- includes adaptive cruise control, blind spot monitoring, rear cross-path detection system, forward collision warning, leather-wrapped instrument panel and center armrest, leather-wrapped upper door trim, power liftgate); SRT High-Performance Audio ($995 -- includes 825-watt Harman Kardon 19-speaker system including three subwoofers with innovative GreenEdge Technology premium SRT performance audio); Dual-Pane Panoramic Sunroof ($1,195); Trailer Tow Group IV ($300 -- includes seven- and four-pin wiring harness, Class IV receiver hitch -- deletes rear tow hook).
As-tested MSRP$60,780
Assembly locationDetroit, Michigan
North American parts content (%)68


ConfigurationLongitudinal, front-engine, all-wheel drive
Engine typeNaturally aspirated, port-injected, V8, gasoline with cylinder deactivation
Displacement (cc/cu-in)6,424/392
Block/head materialIron/aluminum
ValvetrainPushrod, two valves per cylinder
Compression ratio (x:1)10.9
Redline, indicated (rpm)6,200
Fuel cutoff/rev limiter (rpm)6,400
Horsepower (hp @ rpm)470 @ 6,000
Torque (lb-ft @ rpm)465 @ 4,300
Fuel typePremium unleaded (recommended)
Transmission typeFive-speed automatic with console shifter and steering-mounted paddles with sport/competition modes
Transmission ratios (x:1)I = 3.59; II = 2.19; III = 1.41; IV = 1.00; V = 0.83; R = 3.16
Final-drive ratio (x:1)3.70
Differential(s)Electronic limited-slip rear differential


Suspension, frontIndependent double-wishbones, coil springs, driver-adjustable five-mode variable dampers, stabilizer bar
Suspension, rearIndependent multilink, coil springs, driver-adjustable five-mode variable dampers, stabilizer bar
Steering typeHydraulic-assist, speed-proportional, rack-and-pinion power steering
Steering ratio (x:1)17.5
Tire make and modelPirelli P Zero
Tire typeAsymmetrical three-season, performance
Tire sizeP295/45ZR20 (110Y)
Wheel size20-by-10 inches front and rear
Wheel materialForged alloy
Brakes, front15-inch ventilated discs with six-piston fixed calipers
Brakes, rear13.8-inch ventilated discs with four-piston fixed calipers

Track Test Results

Acceleration, 0-30 mph (sec.)1.8
0-45 mph (sec.)3.2
0-60 mph (sec.)5.1
0-75 mph (sec.)7.5
1/4-mile (sec. @ mph)13.4 @ 101.8
0-60 with 1 foot of rollout (sec.)4.8
0-30 mph, trac ON (sec.)1.7
0-45 mph, trac ON (sec.)3.4
0-60 mph, trac ON (sec.)5.2
0-75 mph, trac ON (sec.)7.8
1/4-mile, trac ON (sec. @ mph)13.6 @ 100.9
0-60, trac ON with 1 foot of rollout (sec.)4.9
Braking, 30-0 mph (ft.)28
60-0 mph (ft.)112
Slalom, 6 x 100 ft. (mph)67.2
Slalom, 6 x 100 ft. (mph) ESC ON65.0
Skid pad, 200-ft. diameter (lateral g)0.87
Skid pad, 200-ft. diameter (lateral g) ESC ON0.86
Sound level @ idle (dB)48.0
@ Full throttle (dB)79.2
@ 70 mph cruise (dB)65.4
Engine speed @ 70 mph (rpm)2,300

Test Driver Ratings & Comments

Acceleration commentsNot as quick as the last GC SRT8. Turns out, an extra 50 horsepower can't overcome an extra 500 (!) pounds. Launches hard off the line, but no wheelspin at all, even with power braking. Fairly quick, but abrupt, upshifts from the old five-speed automatic. Tall gearing. Manual shifting is via paddles or console lever (slap left for downshifts with the lever). Holds gears to rev limiter. Does not blip throttle on downshifts.
Braking commentsSlightly longer travel and not quite as firm of a pedal as expected considering these are Brembos, but really terrific stopping ability. Minimal nosedive and the Jeep tracks dead straight every time. Almost zero ABS and tire noise.
Handling commentsSkid pad: Front end feels quite ponderous around the skid pad. Understeers like crazy, and adjusting the throttle doesn't do a whole lot to counter it. Really abuses the front tires, but the grip number is pretty good considering this is a big, heavy SUV. ESC hardly intrusive, only slightly cutting throttle when switched on. Slalom: Wow, seriously impressive. Steering is intuitive, has good weighting, and in Track suspension mode the GC SRT8 just flat sticks. Body roll is very well controlled, and it almost doesn't make sense that a tall vehicle like this can get around the cones so quickly. A constant slight understeer and AWD keep everything in check, and even with ESC fully off the GC never got out of shape. ESC-on cuts some throttle and adds some brakes, but is hardly obnoxious about it.

Testing Conditions

Test date8/9/2011
Test locationCalifornia Speedway
Elevation (ft.)1,121
Temperature (F)67.0
Relative humidity (%)72.3
Barometric pressure (in. Hg)28.8
Wind (mph, direction)2.56, headwind
Odometer (mi.)3,213
Fuel used for test91-octane gasoline
As-tested tire pressures, f/r (psi)35/35

Fuel Consumption

EPA fuel economy (mpg)12 city/18 highway/14 combined
Edmunds observed (mpg)14.9 best/10.8 worst/12.2 average (over 1,044 miles)
Fuel tank capacity (U.S. gal.)24.6
Driving range (mi.)442.8

Audio and Advanced Technology

Stereo descriptionAM/FM/CD/DVD/MP3/HD 825-watt 19-speaker audio system
iPod/digital media compatibilityStandard iPod via USB jack
Satellite radioStandard Sirius/XM with one-year subscription
Hard-drive music storage capacity (Gb)Optional 30GB music storage with 4,250-song capacity
Rear seat video and entertainmentOptional DVD player
Bluetooth phone connectivityStandard
Navigation systemStandard GPS with 6.5-inch display screen
Telematics (OnStar, etc.)Not available
Smart entry/StartStandard, ignition and doors
Parking aidsStandard parking sonar rear back-up camera, optional rear cross path detection
Blind-spot detectionOptional
Adaptive cruise controlOptional
Lane-departure monitoringNot available
Collision warning/avoidanceOptional
Night VisionNot available
Driver coaching displayStandard

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)5,150
Curb weight, as tested (lbs.)5,256
Weight distribution, as tested, f/r (%)55/45
Length (in.)191.3
Width (in.)77.1
Height (in.)69.1
Wheelbase (in.)114.8
Track, front (in.)63.7
Track, rear (in.)64.3
Turning circle (ft.)37.1
Legroom, front (in.)40.3
Legroom, rear (in.)38.6
Headroom, front (in.)39.9
Headroom, rear (in.)39.2
Shoulder room, front (in.)58.7
Shoulder room, rear (in.)58.0
Seating capacity5
Step-in height, measured (in.)19.5
Trunk volume (cu-ft)35.1
Max cargo volume behind 1st row (cu-ft)68.7
Cargo loading height, measured (in.)31.5
GVWR (lbs.)6,500
Payload, mfr. max claim (lbs.)1,350
Tow capacity, mfr. claim (lbs.)5,000
Ground clearance (in.)8.3
Approach angle (degrees)18.5
Departure angle (degrees)22.0
Breakover angle (degrees)17.8


Bumper-to-bumper3 years/36,000 miles
Powertrain5 years/100,000 miles
Corrosion5 years/100,000 miles
Roadside assistance3 years/36,000 miles

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