LR4 is fast for a body on frame SUV with as much off road ability that it does. The passing times 30-60 MPH are 2-3 seconds faster which in everyday driving situations is huge. This is why LR replaced the 4.4L in the 2010 as most reviews pegged it as underpowered and sluggish. Now if you are not in a rush and don't tow much then the 4.4 is fine. If you want to drive in everyday traffic through the mountains etc then the 5.0L is much more liveable, especially when loaded. With the LR3 the transmission is constantly downshifting a cog or two to keep up the "speed of traffic" 75-80 MPH) while the LR4 mostly stays in top gear. The 5.0 in my 2010 gets about 1-2 MPG more than the 4.4 in my 2006 probably due to the fact of the foot being less buried in it all the time.
Heck even Consumer Reports thought the LR3 was slow lol
Heck even Consumer Reports thought the LR3 was slow lol