Bentley Flying Spur vs Porsche 911: Specs Compared
Also searched as Porsche 911 vs Bentley Flying Spur specs — both orientations show this same side-by-side comparison.
The Porsche 911 is the more efficient of the two: it reaches 25 mpg combined versus 19 mpg for the Bentley Flying Spur, a 6 mpg advantage and costs about $950 less per year to fuel.
Across 5 measured categories, the Porsche 911 leads in 4. Figures are EPA test data, not manufacturer claims.
2015–2026
Bentley Flying Spur
Midsize Cars · 23 configurations
Head-to-head specifications
| Metric | Bentley Flying Spur | Porsche 911 |
|---|---|---|
| Best combined MPG | 19 mpg | 25 mpg ✓ |
| Best city MPG | 17 mpg | 22 mpg ✓ |
| Best highway MPG | 24 mpg | 30 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $4,000 | $3,050 ✓ |
| Lowest CO2 output | 161 g/mi ✓ | 355 g/mi |
| Engines offered | SIDI; PHEV, SIDI, SIDI & PFI, 6.0 | SIDI |
| Transmissions | Automatic (AM-S8), Automatic (S8) | Automatic (AM-S8), Manual 6-spd, Automatic (AM-S7) |
| Drivetrains | All-Wheel Drive | Rear-Wheel Drive, All-Wheel Drive, 4-Wheel Drive |
| Fuel types | Premium and Electricity, Premium, Premium or E85 | Premium |
| EPA class | Midsize Cars | Minicompact Cars |
| Years covered | 2015–2026 | 2015–2026 |
| Configurations on record | 23 | 361 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Bentley Flying Spur vs Porsche 911 dimensions and size
The Bentley Flying Spur is 31.5 inches longer than the Porsche 911 on a wheelbase 29.1 inches longer, and 1,979.7 lbs heavier. At over 200 inches, the larger of the two is past the comfortable limit of a standard 192-inch single garage bay once you allow walking room.
| Dimension | Bentley Flying Spur (2026) | Porsche 911 (2026) | Difference |
|---|---|---|---|
| Length | 209.4 in | 178 in | 31.5 in |
| Width (excl. mirrors) | 78 in | 72.8 in | 5.1 in |
| Height | 58.3 in | 51.2 in | 7.1 in |
| Wheelbase | 125.6 in | 96.5 in | 29.1 in |
| Curb weight | 5,452 lbs | 3,472 lbs | 1,980 lbs |
Width excludes mirrors; add 8–12 inches for mirrors out. Figures are for the newest model year on record for each vehicle. See both drawn to scale.
Bentley Flying Spur vs Porsche 911: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Porsche 911 burns about $3,050 of fuel annually against $4,000 for the Bentley Flying Spur. That $950 yearly gap compounds to roughly $4,750 over five years and $7,600 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.
City and highway economy: the Porsche 911 leads in both cycles — 22 mpg city and 30 mpg highway against 17 and 24 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Powertrain choice: the Bentley Flying Spur is recorded with 4 distinct engine configurations (SIDI; PHEV, SIDI, SIDI & PFI), the Porsche 911 with 1 (SIDI). Across 23 recorded Bentley Flying Spur configurations and 361 for the Porsche 911, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.
Drivetrain and class: the Bentley Flying Spur is offered with All-Wheel Drive, the Porsche 911 with Rear-Wheel Drive, All-Wheel Drive, 4-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Midsize Cars and Minicompact Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
Tailpipe emissions: at their cleanest configurations the Bentley Flying Spur emits 161 g/mile of CO2 versus 355 g/mile for the Porsche 911. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.
Flying Spur vs 911: common questions
Which is better on gas, the Bentley Flying Spur or the Porsche 911?
The Porsche 911 is the more efficient of the two: it reaches 25 mpg combined versus 19 mpg for the Bentley Flying Spur, a 6 mpg advantage and costs about $950 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Porsche 911 runs about $3,050 a year in fuel at its most efficient configuration, versus about $4,000 for the Bentley Flying Spur — a difference of roughly $950 per year.
What engines do the Flying Spur and 911 offer?
Bentley Flying Spur: SIDI; PHEV, SIDI, SIDI & PFI, 6.0. Porsche 911: SIDI.
Are they in the same vehicle class?
The EPA classifies the Bentley Flying Spur as Midsize Cars and the Porsche 911 as Minicompact Cars, so they aren't a like-for-like match on size.
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