Rivian R1S vs Tesla Model X: Specs Compared
Also searched as Tesla Model X vs Rivian R1S specs — both orientations show this same side-by-side comparison.
The Tesla Model X is the more efficient of the two: it reaches 105 mpg combined versus 85 mpg for the Rivian R1S, a 20 mpg advantage and costs about $200 less per year to fuel.
Across 4 measured categories, the Tesla Model X leads in 4. Figures are EPA test data, not manufacturer claims.
2022–2027
Rivian R1S
Standard Sport Utility Vehicle 4WD · 94 configurations
2016–2026
Tesla Model X
Standard Sport Utility Vehicle 4WD · 41 configurations
Head-to-head specifications
| Metric | Rivian R1S | Tesla Model X |
|---|---|---|
| Best combined MPG | 85 mpg | 105 mpg ✓ |
| Best city MPG | 94 mpg | 110 mpg ✓ |
| Best highway MPG | 77 mpg | 101 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $900 | $700 ✓ |
| Lowest CO2 output | Not available | Not available |
| Engines offered | Not available | Not available |
| Transmissions | Automatic (A1) | Automatic (A1) |
| Drivetrains | 4-Wheel Drive, Part-time 4-Wheel Drive, All-Wheel Drive | All-Wheel Drive |
| Fuel types | Electricity | Electricity |
| EPA class | Standard Sport Utility Vehicle 4WD | Standard Sport Utility Vehicle 4WD |
| Years covered | 2022–2027 | 2016–2026 |
| Configurations on record | 94 | 41 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Rivian R1S vs Tesla Model X dimensions and size
The Rivian R1S is 2.8 inches longer than the Tesla Model X on a wheelbase 4.3 inches longer, and 1,799 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 | Rivian R1S (2026) | Tesla Model X (2026) | Difference |
|---|---|---|---|
| Length | 200.8 in | 198 in | 2.8 in |
| Width (excl. mirrors) | 79.1 in | 79.1 in | identical |
| Height | 77.2 in | 66.1 in | 11 in |
| Wheelbase | 121.3 in | 116.9 in | 4.3 in |
| Curb weight | 7,068 lbs | 5,269 lbs | 1,799 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.
Rivian R1S vs Tesla Model X: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Tesla Model X burns about $700 of fuel annually against $900 for the Rivian R1S. 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 and highway economy: the Tesla Model X leads in both cycles — 110 mpg city and 101 mpg highway against 94 and 77 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Drivetrain and class: the Rivian R1S is offered with 4-Wheel Drive, Part-time 4-Wheel Drive, All-Wheel Drive, the Tesla Model X 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 Standard Sport Utility Vehicle 4WD and Standard Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
R1S vs Model X: common questions
Which is better on gas, the Rivian R1S or the Tesla Model X?
The Tesla Model X is the more efficient of the two: it reaches 105 mpg combined versus 85 mpg for the Rivian R1S, a 20 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 Tesla Model X runs about $700 a year in fuel at its most efficient configuration, versus about $900 for the Rivian R1S — a difference of roughly $200 per year.
What engines do the R1S and Model X offer?
Rivian R1S: no engine data on record. Tesla Model X: no engine data on record.
Are they in the same vehicle class?
Yes — the EPA classifies both the Rivian R1S and the Tesla Model X as Standard Sport Utility Vehicle 4WD, so they compete directly.
More R1S comparisons
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Comparison id: rivian-r1s-vs-tesla-model-x