2015 head-to-head · Subcompact Car
2015 Jaguar XK vs Porsche 911
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2015 Porsche 911 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,576 a year to fuel (23 MPG), versus $3,118 for the 2015 Jaguar XK (19 MPG). That's roughly $542 a year, or about $2,712 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Jaguar XK
- Porsche 911
Side by side
| Jaguar XK | Porsche 911 | |
|---|---|---|
| $3,118 | Your annual fuel cost | $2,576 |
| 19 MPG | Combined efficiency | 23 MPG |
| 16 MPG | City | 20 MPG |
| 24 MPG | Highway | 28 MPG |
| 74 cu ft | Passenger volume | 70 cu ft |
| 10 cu ft | Cargo volume | 5 cu ft |
| 473 g/mi | Tailpipe CO₂ (g/mi) | 386 g/mi |
| 4/10 | EPA fuel economy score | 5/10 |
| 4/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 5.0L 8-cyl | Engine / motor | 3.4L 6-cyl |
| 6-speed automatic | Transmission | 7-speed dual-clutch |
| RWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Jaguar XK vs Porsche 911 across model years
- Jaguar XK
- Porsche 911
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Jaguar XK has more passenger space (74 vs. 70 cu ft); the Jaguar XK has more cargo space (10 vs. 5 cu ft).
Among 36 2015 subcompact cars, the Jaguar XK ranks 27th and the Porsche 911 23rd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Jaguar XK or the 2015 Porsche 911?
Measured by cost to drive, the Porsche 911. The Jaguar XK is rated 19 MPG combined and the Porsche 911 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Jaguar XK vs. the Porsche 911 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,118 for the Jaguar XK and $2,576 for the Porsche 911.
Which has more cargo space?
The Jaguar XK, with 10 cu ft of luggage volume versus 5 cu ft (EPA interior volume index).
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