2027 Rivian R1S Premium (20in) Specs
1 powertrain configuration on federal record for the 2027 Rivian R1S Premium (20in): Electricity, rated up to 79 MPG combined by the EPA.
Source: EPA federal records (fueleconomy.gov) · Updated 2026-10-26 · By CarWhere Research
| Engine | Transmission | Drivetrain | City | Highway | Combined |
|---|---|---|---|---|---|
| Electricity | Automatic (A1) | 4-Wheel Drive | 85 | 72 | 79 |
R1S Premium (20in) by year
Shopping this R1S Premium (20in)? See the market, not just the specs.
Browse live R1S Premium (20in) inventory, see what buyers actually paid before you talk numbers.
Frequently asked questions
What engines does the 2027 Rivian R1S Premium (20in) have?
One powertrain on federal record: Electricity, offered with Automatic (A1) and 4-Wheel Drive. The full per-configuration table is above.
What gas mileage does the 2027 Rivian R1S Premium (20in) get?
EPA combined ratings run 79–79 MPG depending on configuration — the table above shows city/highway/combined for each engine, transmission, and drivetrain.
How do I get the specs for my exact VIN?
These are the federal-record configurations for the 2027 Rivian R1S Premium (20in) overall. For one specific vehicle — its exact engine, trim, factory options, and original window sticker — decode the 17-character VIN free at carwhere.com/tools/vin-decoder.
Where does this data come from?
The U.S. EPA's public vehicle dataset (fueleconomy.gov) — the federal record of every US-market configuration since 1984 — refreshed 2026-10-26. Public-domain data; republish with attribution to CarWhere (carwhere.com).