2021 Lamborghini Aventador Sian 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 Lamborghini Aventador Sian Roadster.

The 2021 Lamborghini Aventador Sian 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 Lamborghini Aventador Sian Roadster is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2021 Lamborghini Aventador Sian Roadster Get?

First off, the most commonly asked question. A 2021 Lamborghini Aventador Sian Roadster gets up to 8 miles per gallon in the city, and 14 miles per gallon on the highway.

The combined average MPG for the 2021 Lamborghini Aventador Sian Roadster is 10 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2021 Lamborghini Aventador Sian Roadster?

The estimated fuel costs for the 2021 Lamborghini Aventador Sian Roadster is $7,400 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 Lamborghini Aventador Sian Roadster to an average vehicle over 5 years, you will spend $25,500 more on fuel.

The 2021 Lamborghini Aventador Sian 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 Lamborghini Aventador Sian Roadster is 10 miles per gallon, and according to the current tax for each level of MPG, you can expect to pay a tax of $7,700 per year.

🛢 How Many Barrels of Petroleum Does a 2021 Lamborghini Aventador Sian Roadster Consume?

The 2021 Lamborghini Aventador Sian Roadster will consume roughly 30 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 Lamborghini Aventador Sian Roadster Emit?

For every mile driven, the 2021 Lamborghini Aventador Sian Roadster will emit 867 grams of CO2, which is about 13,005,000 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 443 trees would be needed to offset emissions from the 2021 Lamborghini Aventador Sian Roadster.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2021 Lamborghini Aventador Sian Roadster.

City MPG8
Highway MPG14
Combined MPG10
Save/Spend vs Average CarSpend $25,500
Gas Guzzler Tax$7,700
Fuel Cost$7,400
Fuel Type 1Premium
Barrels of Petroleum30
Grams of CO213,005,000
Trees Needed to Offset619
DriveAll-Wheel Drive
Cylinders12
Displacement6.5
TransmissionAutomatic (AM-S7)
Vehicle ClassTwo Seaters
Start/Stop?Yes
Supercharged?No
Turbocharged?No

Related Lamborghini Models from 2021

If you're interested in other Lamborghini 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.

  • "2021 Lamborghini Aventador Sian Roadster MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/lamborghini/aventador-sian-roadster/2021.

  • "2021 Lamborghini Aventador Sian Roadster MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/lamborghini/aventador-sian-roadster/2021. Accessed January 3, 2026.

  • 2021 Lamborghini Aventador Sian Roadster MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/lamborghini/aventador-sian-roadster/2021.