2012 Jeep Grand Cherokee Long Term Road Test


2012 Jeep Grand Cherokee SRT8 vs. 2010 Land Rover Range Rover Sport Supercharged: Track Tested

June 06, 2012

srt8-vs-rr_1600.jpg

Edmunds.com tests hundreds of vehicles a year, but not every vehicle gets a full write-up. The numbers still tell a story, though, so we present "IL Track Tested." It's a quick rundown of all the data we collected at the track, along with comments direct from the test drivers. Enjoy.

Despite gas prices, electronic nannies and safety regulations, we're living the glory days, friends. Engines have never been so powerful and so accessible. Take the 2012 Jeep Grand Cherokee SRT8, for example. This SUV has a 6.4-liter naturally aspirated pushrod V8 that cranks out 470 horsepower and 465 pound-feet of torque while meeting strict California emissions standards. And it's not alone in the segment, not by a long shot, and the closest competitor comes from Great Britain in the form of the 2010 Range Rover Sport Supercharged. (The S/C Range Rover Sport lives on today, but we haven't seen one on our track since that model year.)

The Range Rover makes 510 horsepower to the Jeep's 470. It produces 461 pound-feet of torque to the Jeep's 465. The Range has a six-speed automatic; Jeep's only got 5 forward gears.

The Range Rover is also $20,000 more expensive. Does it show its worth at the track?

srt8_1600.jpg

Grand Cherokee SRT8      2010 Land Rover Range Rover Sport SC
0-30 (sec):                                 1.7                                2.0
0-45 (sec):                                 3.0                                3.5
0-60 (sec):                                 4.9                                5.2
0-60 with 1-ft Rollout (sec):          4.6                                4.9
0-75 (sec):                                 7.3                                7.5
1/4-mile (sec @ mph):           13.3 @ 101.6                   13.4 @ 104.1

30-0 (ft):                                     27                                 31
60-0 (ft):                                    109                               123
Skid pad lateral accel (g):           0.87                              0.76
Slalom                                       67.1                              61.0

Vehicle: 2012 Jeep Grand Cherokee SRT8
Odometer: 1,859
Date: 5-23-2012
Driver: Chris Walton
Price: $62,880

Specifications: Drive Type: All-wheel drive
Transmission Type: Five-speed automatic 
Engine Type: Longitudinal, naturally aspirated V8
Displacement (cc/cu-in): 6,399/392
Redline (rpm): 6,200
Horsepower (hp @ rpm): 470 @ 6,000 
Torque (lb-ft @ rpm): 465 @ 4,300
Brake Type (front): 15-inch vented discs with six-piston Brembo calipers
Brake Type (rear): 13.7-inch discs with four-piston Brembo calipers
Suspension Type (front): Independent double wishbones, coil springs, stabilizer bar
Suspension Type (rear): independent multilink, coil springs, stabilizer bar
Tire Size (front): 295/45 ZR20 (110Y)
Tire Size (rear): 295/45 ZR20 (110Y)
Tire Brand: Pirelli
Tire Model: P Zero
Wheel Size: 20-by-10 inches front and rear
Tire Type:  Summer performance
As tested Curb Weight (lb): 5,261

Test Results:

Acceleration
0-30 (sec): 1.7 (1.8 w/TC on)
0-45 (sec): 3.0 (3.2 w/TC on)
0-60 (sec): 4.9 (5.1 w/TC on)
0-60 with 1-ft Rollout (sec): 4.6 (4.8 w/TC on)
0-75 (sec): 7.3 (7.6 w/TC on)
1/4-Mile (sec @ mph): 13.3 @ 101.6 (13.5 @ 100.9)

Braking:
30-0 (ft): 27
60-0 (ft): 109

Handling
Slalom (mph): 67.1 ( 66.2 w/TC on)
Skid Pad Lateral acceleration (g): 0.87 ( 0.87 w/TC on )

Db @ Idle:
Db @ Full Throttle:  76.4
Db @ 70 mph Cruise: 61.7

Acceleration: The Jeep punishes pedal overlap at launch so the best technique was near-simultaneous off-brake/on-throttle. Either way, the Jeep leaps off the line and the tach swings freely up to redline and "burps" off very quick upshifts (noticeably quicker in Track mode). Sounds magnificent and burly.

Braking: These brakes like some heat for optimal performance, so the shortest stop occurred on the 5 (of 7). Medium-firm pedal, steep jump-in, minimal dive (in Track or Sport) and essentially fade-free. Remarkable for a 5,000-plus-pound SUV.

Handling:

Skid pad: With ESC off, I could steer merely with the throttle -- allowing the mild understeer to come and go. Couldn't detect AWD shifting power around. With ESC on, I was much busier with the steering wheel as the electronics applied brakes and cut throttle. Resulted in same outcome.

Slalom: A little lazy with initial steering response, but takes a set immediately (in Track). Relatively little roll means it transitions quickly/predictably. With ESC off, the Jeep is essentially neutral and wants to be chucked past each cone, then becomes slightly loose. Luckily, the AWD and throttle solve this "problem." The tires allow predictable break-away at a high threshold. ESC On snubbed understeer subtly and quickly. Effective and obviously well-tuned ESC settings. Again, this is a remarkable performance for a 5,000-plus-pound SUV.

Vehicle: 2010 Land Rover Range Rover Sport Supercharged
Odometer: 1,743
Date: 11/10/09
Driver: Chris Walton
Price: $82,345

Specifications:
Drive Type: Permanent four-wheel drive with two-speed transfer case, and locking center and rear differentials
Transmission Type: Six-speed automatic with Sport and Manual modes with steering-wheel-mounted paddles
Engine Type: Supercharged 90-degree V8
Displacement (cc/cu-in): 5,000/305
Redline (rpm): 6,800
Horsepower (hp @ rpm): 510 @ 6,000-6,500
Torque (lb-ft @ rpm): 461 @ 2,500-5,500
Brake Type (front): 15.0-inch ventilated disc with 6-piston fixed calipers
Brake Type (rear): 14.4-inch ventilated disc with single-piston sliding calipers
Steering System: Variable-ratio, hydraulic-assist power rack-and-pinion steering
Suspension Type (front): Independent, double-wishbone, air springs, adaptive dampers
Suspension Type (rear): Independent, double-wishbone, air springs, adaptive dampers
Tire Size (front): 275/40R20
Tire Size (rear): 275/40R20
Tire Brand: Michelin
Tire Model: Latitude Diamaris
Tire Type: Asymmetrical, directional summer tires
Wheel size: 20-by-9.5 inches front and rear
Wheel material (front/rear): Aluminum
As tested Curb Weight (lb): 5,853

Test Results:
0-30 (sec): 2.0 (2.1 w/TC on)
0-45 (sec): 3.5 (3.8 w/TC on)
0-60 (sec): 5.2 (5.5 w/TC on)
0-60 with 1-ft Rollout (sec): 4.9 (5.2 w/TC on)
0-75 (sec): 7.5 (8.0 w/TC on)
1/4 Mile (sec @ mph): 13.4 @ 104.1 (13.7 @ 103.3 w/TC on)

30-0 (ft): 31
60-0 (ft): 123
Braking Rating: Very Good
Slalom (mph): 61.1 (59.5 stability control on)
Skid Pad Lateral acceleration (g): 0.76 (0.73 stability control on)
Handling Rating: Average
Db @ Idle: 48.8
Db @ Full Throttle: 72.3
Db @ 70 mph Cruise: 59.2

Acceleration Comments: This new motor is damned powerful and an enormous improvement over the last Range Rover Sport S/C. Smooth, torquey and happy to rev. Upshifts are both smooth and fast.

Braking Comments: Impressive power, excellent fade resistance (best stop on fifth run) and pretty decent feel. Expected more forward pitch.

Handling Comments: Skid pad: Turning the stability control off only widens the envelope slightly, but noticeably allows the Range Rover Sport to use all available grip. Steering is a little heavy and isolated but appropriately so. Slalom: Trial and error to guess the stability control system's threshold, but still more allowance (and capability) than I expected. Doesn't abuse the tires or feel as if it's going to tip over. The "Sport" designation means something more this time around.

Leave a Comment

Research Models

ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT

Edmunds Insurance Estimator

The Edmunds TCO® estimated monthly insurance payment for a 2012 Jeep Grand Cherokee in VA is:

$144 per month*
* Explanation
ADVERTISEMENT
Have a question? We're here to help!
Chat*
Chat online with us
Email
Email us at help@edmunds.com
*Available daily 8AM-5PM Pacific
Phone*
Call us at 855-782-4711
SMS*
Text us at ED411