2021 Mercedes-Benz AMG GT Roadster MPG and Fuel Economy
On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2021 Mercedes-Benz AMG GT Roadster.
The 2021 Mercedes-Benz AMG GT Roadster runs on premium gasoline and is in the Two Seaters car class.
Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 2021 Mercedes-Benz AMG GT Roadster is, we have the information you need.
🛣 How Many Miles per Gallon (MPG) Does a 2021 Mercedes-Benz AMG GT Roadster Get?
First off, the most commonly asked question. A 2021 Mercedes-Benz AMG GT Roadster gets up to 15 miles per gallon in the city, and 20 miles per gallon on the highway.
The combined average MPG for the 2021 Mercedes-Benz AMG GT Roadster is 17 miles per gallon.
💵 What is the Average Yearly Fuel Cost for a 2021 Mercedes-Benz AMG GT Roadster?
The estimated fuel costs for the 2021 Mercedes-Benz AMG GT Roadster is $4,350 per year.
That value has been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.
If you were to compare a 2021 Mercedes-Benz AMG GT Roadster to an average vehicle over 5 years, you will spend $10,250 more on fuel.
The 2021 Mercedes-Benz AMG GT Roadster is also subject to the Gas Guzzler Tax, which is a federal tax on vehicles that has a combined MPG of less than 22.5.
The combined average MPG for the 2021 Mercedes-Benz AMG GT Roadster is 17 miles per gallon, and according to the current tax for each level of MPG, you can expect to pay a tax of $3,000 per year.
🛢 How Many Barrels of Petroleum Does a 2021 Mercedes-Benz AMG GT Roadster Consume?
The 2021 Mercedes-Benz AMG GT Roadster will consume roughly 18 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.
The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.
💨 How Many Grams of CO2 Does a 2021 Mercedes-Benz AMG GT Roadster Emit?
For every mile driven, the 2021 Mercedes-Benz AMG GT Roadster will emit 533 grams of CO2, which is about 7,995,000 grams of CO2 per year.
🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 273 trees would be needed to offset emissions from the 2021 Mercedes-Benz AMG GT Roadster.
Overview
The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2021 Mercedes-Benz AMG GT Roadster.
| City MPG | 15 |
|---|---|
| Highway MPG | 20 |
| Combined MPG | 17 |
| Save/Spend vs Average Car | Spend $10,250 |
| Gas Guzzler Tax | $3,000 |
| Fuel Cost | $4,350 |
| Fuel Type 1 | Premium |
| Barrels of Petroleum | 18 |
| Grams of CO2 | 7,995,000 |
| Trees Needed to Offset | 381 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 4 |
| Transmission | Automatic (AM7) |
| Vehicle Class | Two Seaters |
| Start/Stop? | Yes |
| Supercharged? | No |
| Turbocharged? | Yes |
Related Mercedes-Benz Models from 2021
If you're interested in other Mercedes-Benz models from 2021, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.
Link To or Reference This Page
If you use this page in your research, please reference MPG Buddy as the source.
<a href="https://mpgbuddy.com/cars/mercedes-benz/amg-gt-roadster/2021">2021 Mercedes-Benz AMG GT Roadster MPG and Fuel Economy</a>
"2021 Mercedes-Benz AMG GT Roadster MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/mercedes-benz/amg-gt-roadster/2021.
"2021 Mercedes-Benz AMG GT Roadster MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/mercedes-benz/amg-gt-roadster/2021. Accessed January 3, 2026.
2021 Mercedes-Benz AMG GT Roadster MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/mercedes-benz/amg-gt-roadster/2021.