Audi S8 vs Nissan GT-R: Specs Compared
Also searched as Nissan GT-R vs Audi S8 specs — both orientations show this same side-by-side comparison.
The Audi S8 is the more efficient of the two: it reaches 20 mpg combined versus 19 mpg for the Nissan GT-R, a 1 mpg advantage and costs about $200 less per year to fuel.
Across 4 measured categories, the Audi S8 leads in 4. Figures are EPA test data, not manufacturer claims.
Head-to-head specifications
| Metric | Audi S8 | Nissan GT-R |
|---|---|---|
| Best combined MPG | 20 mpg ✓ | 19 mpg |
| Best city MPG | 16 mpg | 16 mpg |
| Best highway MPG | 27 mpg ✓ | 23 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $3,800 ✓ | $4,000 |
| Lowest CO2 output | 452 g/mi ✓ | 472 g/mi |
| Engines offered | SIDI; Mild Hybrid, SIDI | 3.8 |
| Transmissions | Automatic (S8) | Automatic (AM-S6), Automatic (AM6) |
| Drivetrains | All-Wheel Drive | All-Wheel Drive |
| Fuel types | Premium | Premium |
| EPA class | Large Cars | Subcompact Cars |
| Years covered | 2015–2027 | 2015–2024 |
| Configurations on record | 12 | 9 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Audi S8 vs Nissan GT-R dimensions and size
The Audi S8 is 20.5 inches longer than the Nissan GT-R on a wheelbase 8.7 inches longer, and 1,391.1 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 | Audi S8 (2026) | Nissan GT-R (2024) | Difference |
|---|---|---|---|
| Length | 203.9 in | 183.5 in | 20.5 in |
| Width (excl. mirrors) | 76.8 in | 74.8 in | 2 in |
| Height | 57.9 in | 53.9 in | 3.9 in |
| Wheelbase | 118.1 in | 109.4 in | 8.7 in |
| Curb weight | 5,313 lbs | 3,922 lbs | 1,391 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.
Audi S8 vs Nissan GT-R: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Audi S8 burns about $3,800 of fuel annually against $4,000 for the Nissan GT-R. That $200 yearly gap compounds to roughly $1,000 over five years and $1,600 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 versus highway split: the Nissan GT-R is the stronger commuter at 16 mpg city, while the Audi S8 pulls ahead on the interstate at 27 mpg highway. If most of your driving is stop-and-go traffic the city figure is the one to weigh; for long-distance highway mileage the reverse is true, and the two vehicles effectively swap places depending on how you drive.
Powertrain choice: the Audi S8 is recorded with 2 distinct engine configurations (SIDI; Mild Hybrid, SIDI), the Nissan GT-R with 1 (3.8). Across 12 recorded Audi S8 configurations and 9 for the Nissan GT-R, 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 Audi S8 is offered with All-Wheel Drive, the Nissan GT-R with All-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 Large Cars and Subcompact 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 Audi S8 emits 452 g/mile of CO2 versus 472 g/mile for the Nissan GT-R. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.
S8 vs GT-R: common questions
Which is better on gas, the Audi S8 or the Nissan GT-R?
The Audi S8 is the more efficient of the two: it reaches 20 mpg combined versus 19 mpg for the Nissan GT-R, a 1 mpg advantage and costs about $200 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Audi S8 runs about $3,800 a year in fuel at its most efficient configuration, versus about $4,000 for the Nissan GT-R — a difference of roughly $200 per year.
What engines do the S8 and GT-R offer?
Audi S8: SIDI; Mild Hybrid, SIDI. Nissan GT-R: 3.8.
Are they in the same vehicle class?
The EPA classifies the Audi S8 as Large Cars and the Nissan GT-R as Subcompact Cars, so they aren't a like-for-like match on size.
More S8 comparisons
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Comparison id: audi-s8-vs-nissan-gt-r