2008 Audi RS4 Cabriolet MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2008 Audi RS4 Cabriolet.

The 2008 Audi RS4 Cabriolet runs on premium gasoline and is in the Subcompact Cars 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 2008 Audi RS4 Cabriolet is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 2008 Audi RS4 Cabriolet Get?

First off, the most commonly asked question. A 2008 Audi RS4 Cabriolet gets up to 12 miles per gallon in the city, and 19 miles per gallon on the highway.

The combined average MPG for the 2008 Audi RS4 Cabriolet is 14 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 2008 Audi RS4 Cabriolet?

The estimated fuel costs for the 2008 Audi RS4 Cabriolet is $5,300 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 2008 Audi RS4 Cabriolet to an average vehicle over 5 years, you will spend $15,000 more on fuel.

The 2008 Audi RS4 Cabriolet 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 2008 Audi RS4 Cabriolet is 14 miles per gallon, and according to the current tax for each level of MPG, you can expect to pay a tax of $5,400 per year.

🛢 How Many Barrels of Petroleum Does a 2008 Audi RS4 Cabriolet Consume?

The 2008 Audi RS4 Cabriolet will consume roughly 21 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.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 2008 Audi RS4 Cabriolet.

City MPG12
Highway MPG19
Combined MPG14
Save/Spend vs Average CarSpend $15,000
Gas Guzzler Tax$5,400
Fuel Cost$5,300
Fuel Type 1Premium
Barrels of Petroleum21
Drive4-Wheel or All-Wheel Drive
Cylinders8
Displacement4.2
TransmissionManual 6-spd
Vehicle ClassSubcompact Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Related Audi Models from 2008

If you're interested in other Audi models from 2008, 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.

  • "2008 Audi RS4 Cabriolet MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/audi/rs4-cabriolet/2008.

  • "2008 Audi RS4 Cabriolet MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/audi/rs4-cabriolet/2008. Accessed January 3, 2026.

  • 2008 Audi RS4 Cabriolet MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/audi/rs4-cabriolet/2008.