Against 369 other V8 cars rated 2007–2009, the XJ8 beats their 15.8 mpg average by 3.2 mpg, about $409 a year. Averaged over the years each was sold, the most economical engine since 1998, the 4.2L 8-cyl (2004–2009), does 19 mpg and the thirstiest, the 4L 8-cyl (1998–2003), 18: $112 a year apart.
Every Jaguar XJ8 engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 4.2L 8-cyl | 16 / 25 | 2004–2009 | $2,021 | |
| 4L 8-cyl | 15.2 / 22 | 1998–2003 | $2,133 |
What that actually costs
Against its rivals in the same model years, the Toyota Corolla gets 30.3 mpg, the Lexus IS 21 mpg and the Ford Focus 28 mpg, next to 19 mpg for the 2009 XJ8. The XJ8 costs the most of them to run: $754 a year more than the Toyota Corolla.
| Measure | Value |
|---|---|
| Cost per mile (2009) | $0.168 |
| Fuel per year | $2,021 |
| Fuel over five years | $10,105 |
| Against other V8 cars, 2007–2009 | −$409 a year |
| EPA's own estimate | $4,175 a year |
City or highway — who is this car for
The 2009 Jaguar XJ8 gives up 9 mpg in town: 25 on the highway against 16 in the city, $864 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2009) | 16 mpg | $2,400 a year if you only drive in town |
| Highway | 25 mpg | $1,536 a year if you mostly commute |
| Gap | +9 mpg (56%) | Wide — this car dislikes traffic |
How the XJ8 changed over the years
The XJ8 peaked in 2009 at 19 mpg (16 city, 25 highway) and was at its thirstiest in 2003 at 18 — 1 mpg apart, or $112 a year in fuel between buying one year and the other.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2009 | 16 / 25 | 1 | $2,021 | |
| 2008 | 16 / 25 | 1 | $2,021 | |
| 2007 | 16 / 25 | 1 | $2,021 | |
| 2006 | 16 / 25 | 1 | $2,021 | |
| 2005 | 16 / 25 | 1 | $2,021 | |
| 2004 | 16 / 25 | 1 | $2,021 | |
| 2003 | 15 / 22 | 1 | $2,133 | |
| 2002 | 15 / 22 | 1 | $2,133 | |
| 2001 | 15 / 22 | 1 | $2,133 | |
| 2000 | 15 / 22 | 1 | $2,133 | |
| 1999 | 15 / 22 | 1 | $2,133 | |
| 1998 | 16 / 22 | 1 | $2,133 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 12 EPA ratings of the Jaguar XJ8 — 2 engines across 1998–2009. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $4,175. Full method.
Frequently asked questions
What mpg does the 2009 Jaguar XJ8 get?
19 mpg combined, 16 city and 25 highway, per EPA. Across every year since 1998 the XJ8 has averaged 18.5 mpg.
Is the 2009 XJ8 more efficient than the 2008?
About the same: 19 against 19 mpg combined.
Which XJ8 year has the best gas mileage?
The 2009, at 19 mpg combined (16 city, 25 highway), which is also the latest model year we hold.
Does the XJ8 get better gas mileage than the Toyota Corolla?
No: 19 mpg for the 2009 XJ8 against 30.3 for the 2010 Toyota Corolla, about $754 a year more to run.
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