Jeep Liberty CRD Performance and Fuel Economy




Production

Eco Tune FT Eco Tune HOT Tune Turbo Kit
160 hp 188 hp 188 hp 200 hp 218 hp
300 ft*lb (260 w/ dealer detune) 335 ft*lb (270 ft*lb in lock-up) 335 ft*lb 364 ft*lb 400 ft*lb

0-60 mph Performance (Sea level, 70 F)
Run (in seconds) 1 2 3 4 Avg
Production 12.05 11.94 11.91 11.80 11.93
Eco Tune 10.77 10.27 10.66 10.31 10.50
Hot Tune 10.01 10.33 10 10.35 10.20
Turbo Kit 8.4 8.2 8.35 8.3 8.31

The torque is increased over a large rpm range, thus providing a better "seat of the pants" feeling during city acceleration and highway passing. The 0-60 mph performance runs show a 1.5 second improvement vs. stock with ECO tune. The HOT tune is good for another 3 tenths over the ECO tune! The turbo kit is a whole new sport!

Power-Torque Graph Power-Torque Data

FUEL ECONOMY COMPARISON

The stock Liberty CRD has decent fuel economy, but with all the recent instability in fuel prices consumers are becoming more cognizant of finding ways to reduce fuel consumption and operating expenses. The ECO tune reduces combined city/highway fuel consumption substantially and net a 3-5mpg improvement overall.

Now let's look at the real world fuel economy results. The fuel economy numbers in mpg will vary from owner to owner based on driving style (conservative vs. aggressive) and the percentage mix between city and highway driving. The smoother and lighter your foot, the higher the fuel economy gains. Don't expect massive improvements if driving with a lead foot.

2005KJ Stock Hardware

2006KJ Abused Driveline, All-terrain tires

City Circuit 1 (70 F, no AC)

City Circuit 1 (70 F, no AC)

Stock Liberty = 17 mpg
Tuned Liberty = 22 mpg


Stock Liberty = 15 mpg
Tuned Liberty = 19 mpg


60 mph cruise (70 F, no AC)

60 mph cruise (70 F, no AC)

Stock Liberty = 31 mpg
Tuned Liberty = 36 mpg


Stock Liberty = 29 mpg
Tuned Liberty = 33 mpg


70 mph cruise (70 F, no AC)

70 mph cruise (70 F, no AC)

Stock Liberty = 27 mpg
Tuned Liberty = 32 mpg


Stock Liberty = 25 mpg
Tuned Liberty = 28 mpg