Dimensions of the 2018 Audi A6: What Buyers Need to Know

The 2018 Audi A6 (C7.5 generation) measures roughly 4.93 m in length, 1.87 m in width (about 2.09 m including mirrors), and 1.46 m in height, with a wheelbase of about 2.91 m. These proportions place it firmly in the midsize executive sedan class, offering a spacious cabin and sizable trunk while remaining manageable in urban environments.

Overview of the 2018 Audi A6 Size

The 2018 model year was the final full year of the C7-generation A6 in many markets before Audi transitioned to the newer C8 platform. As such, its dimensions are well established and consistent across most trims worldwide, with only minor variations between standard, S line, and performance versions such as the S6. The car’s footprint is typical for a premium business sedan, balancing interior comfort, luggage capacity, and on-road stability.

Key Exterior Dimensions

The core external measurements define how the 2018 Audi A6 fits into parking spaces, garages and tight city streets, as well as how it appears alongside rivals from BMW and Mercedes-Benz.

Main Body Dimensions (Saloon/Sedan)

The following list summarizes the principal exterior dimensions for the 2018 Audi A6 four-door saloon (sedan) in most global specifications. Figures can vary slightly by market and trim, but these values are representative of Audi’s factory data for the C7.5-generation A6.

• Overall length: approx. 4,933 mm (194.2 in)
• Overall width (without mirrors): approx. 1,874 mm (73.7 in)
• Overall width (with mirrors): approx. 2,086 mm (82.1 in)
• Overall height: approx. 1,455–1,468 mm (57.3–57.8 in), depending on suspension and trim
• Wheelbase: approx. 2,912 mm (114.6 in)
• Front track: approx. 1,612–1,626 mm (63.5–64.0 in), depending on wheel/suspension
• Rear track: approx. 1,605–1,617 mm (63.2–63.7 in), depending on wheel/suspension
• Turning circle (kerb-to-kerb): roughly 11.1–11.5 m (36.4–37.7 ft), depending on market/steering spec

Taken together, these dimensions make the 2018 A6 a relatively large sedan, but its proportions stay within the norm for the segment, making it familiar to anyone used to driving premium midsize saloons.

Avant (Wagon/Estate) Variant Dimensions

In many markets, the 2018 Audi A6 was also sold as the Avant (estate/wagon), which shares nearly all of its core dimensions with the sedan while adding a more practical rear section. The following figures reflect typical factory data for the A6 Avant of the same generation.

• Overall length: approx. 4,943 mm (194.6 in)
• Overall width (without mirrors): approx. 1,874 mm (73.7 in)
• Overall width (with mirrors): approx. 2,086 mm (82.1 in)
• Overall height: approx. 1,460–1,481 mm (57.5–58.3 in), slightly taller due to roofline and rails
• Wheelbase: approx. 2,912 mm (114.6 in) – same as sedan
• Front and rear track: similar to the sedan, with minor variations based on wheel size

These close similarities mean the Avant drives much like the sedan but offers a more versatile cargo area, a key attraction for buyers who prioritize practicality without moving into SUV territory.

Interior Space and Cargo Dimensions

While buyers often look first at external length and width, the interior packaging and luggage capacity are just as crucial for day-to-day usability. The 2018 A6 delivers an interior comfortable enough for four adults on long trips, with room for a fifth in shorter journeys.

Cabin and Passenger Space

Automakers do not always quote detailed interior dimensions in the same way they do exterior measurements, and figures can vary by testing standard. However, typical measurements and real-world impressions of the 2018 Audi A6 reveal a generous interior that is competitive within its class.

• Front headroom: roughly 1,010–1,020 mm (39.8–40.2 in), depending on sunroof and market
• Rear headroom: roughly 960–970 mm (37.8–38.2 in)
• Front legroom: about 1,050–1,060 mm (41.3–41.7 in), measured to standard industry methods
• Rear legroom: around 950–980 mm (37.4–38.6 in), allowing comfortable seating for taller passengers
• Front shoulder room: approximately 1,460–1,470 mm (57.5–57.9 in)
• Rear shoulder room: approximately 1,440–1,450 mm (56.7–57.1 in)

These cabin dimensions position the 2018 A6 as a genuinely usable family or business car, with rear legroom that is competitive with similar BMW 5 Series and Mercedes E-Class models.

Trunk and Cargo Capacity

Cargo volume is particularly important for buyers who travel frequently, carry sports equipment or regularly use the car for family duties. The 2018 A6 offers substantial luggage space, especially in the Avant configuration.

• Saloon/Sedan boot capacity: approx. 530 liters (18.7 cu ft) under the parcel shelf
• Avant (estate) cargo capacity, rear seats up: approx. 565–586 liters (about 20.0–20.7 cu ft), depending on measurement standard and trim
• Avant cargo capacity, rear seats folded: up to around 1,680 liters (59.3 cu ft)
• Split-fold rear seats: typically 60:40 (or 40:20:40 in some trims/markets) to aid cargo flexibility

In practical terms, the sedan’s trunk can easily handle several large suitcases, while the Avant transforms the A6 into a credible alternative to a midsize SUV for luggage-heavy trips.

Dimensional Differences by Trim and Market

Although the basic structure of the 2018 Audi A6 remains consistent worldwide, some trims and equipment choices introduce small variations in height, weight, or track width. These do not radically change the car’s footprint but can be relevant to enthusiasts or those comparing specification sheets closely.

S line and Sport Suspensions

Buyers choosing S line or sport packages often gain a slightly lower ride height, which can marginally alter overall height measurements. The following points outline the main dimensional shifts seen in these variants.

• Sport/S line suspension: typically lowers the car by about 10–20 mm (0.4–0.8 in) versus standard suspension
• Height impact: overall height may move toward the lower end of the 1,455–1,468 mm range
• Track variation: wider wheels and tires can cause minor differences in stated track width, often within a few millimeters
• Aerodynamic add-ons: S line body kits have minimal effect on length/width but can alter published drag coefficients rather than core dimensions

For everyday use, these changes are unlikely to be noticed in terms of parking or garage fit, but they do subtly refine the stance and handling of the car.

Performance Models: S6

The 2018 S6, the high-performance derivative of the A6, shares the same underlying platform and thus nearly identical core dimensions. The key differences relate mainly to styling and running gear rather than fundamental size.

• Overall length: broadly similar to the standard A6 (around 4,933 mm), sometimes listed a few millimeters different due to bumpers
• Overall width: roughly the same without mirrors; apparent width can feel greater due to wheel and tire choices
• Height: often slightly lower than a standard A6 because of sport suspension, but still within the 1,45x mm range
• Wheelbase: unchanged at around 2,912 mm
• Track widths: may be marginally wider with performance wheels and tires

In dimensional terms, then, the S6 occupies effectively the same space as the regular A6; its differentiators are the engine, suspension tuning and braking hardware, not size.

How the 2018 A6 Compares in Its Class

The 2018 Audi A6 competes directly with the BMW 5 Series, Mercedes-Benz E-Class, Jaguar XF and Volvo S90/V90. When viewed against these rivals, the A6’s size sits very much in the middle of the pack, neither the longest nor the most compact.

Segment Benchmarking

Class comparisons help to illustrate how the A6’s footprint feels in real-world use and how it stacks up against other executive sedans on the market during the same period.

• Against BMW 5 Series (G30, 2017–): the 5 Series is slightly longer overall but comparable in wheelbase and interior space
• Against Mercedes-Benz E-Class (W213): the E-Class is roughly similar in both length and width, with minute differences varying by exact model
• Against Volvo S90: the S90 tends to be a bit longer, emphasizing rear legroom and a more stretched silhouette
• Parking and maneuverability: in practice, all cars in this segment, including the A6, demand similar parking space and turning area

For buyers, this means that choosing the A6 over its direct rivals rarely comes down to raw dimensions alone; design, technology, driving feel and brand preferences typically play a larger role.

Practical Considerations: Garages, Parking, and Everyday Use

Understanding the precise size of the 2018 Audi A6 is useful before committing to ownership, especially where parking is tight or home garages are small. The combination of length just under 4.95 m and width over 2.08 m with mirrors makes planning essential in older or constrained spaces.

Fitting the A6 Into Real-World Spaces

When planning for ownership, drivers might want to compare the A6’s dimensions with parking availability, garage room and typical city infrastructure. The following points outline common practical concerns.

• Standard garage fit: a typical single-car garage in Europe or North America usually accommodates a vehicle of around 5.0 m length and 2.1–2.3 m width including mirrors, so the A6 generally fits but may leave modest clearance
• Parking bay size: many public bays are about 2.4–2.5 m wide and 4.8–5.0 m long, making the A6 a snug but workable fit
• Mirror folding: models equipped with power-folding mirrors can reduce overall width when parked, improving ease of access around the car
• Front and rear overhangs: the A6’s long overhangs require careful attention to curbs and low obstacles to avoid bumper damage

With reasonable care, owners typically find the car manageable in everyday conditions, though those moving from compact cars may notice the size increase at first.

Summary

The 2018 Audi A6 sits squarely within the midsize executive segment, measuring around 4.93 m in length, 1.87 m in width (over 2.08 m including mirrors), and roughly 1.46 m in height, with a wheelbase of about 2.91 m. These proportions deliver a spacious cabin, respectable rear legroom and a sizable trunk in the sedan, while the Avant estate version adds further cargo versatility. Variations in S line, sport and S6 trims only marginally adjust overall height and track, leaving the fundamental footprint largely unchanged. For buyers cross-shopping among premium sedans, the A6’s dimensions are competitive but not extreme, offering a balanced blend of comfort, usability and road presence.

What is the most common problem with the Audi A6?

The Audi A6 is known for a comfortable ride, but its suspension and steering components don’t always hold up well over time. One of the most common issues is premature wear of control arms and tie rod ends, which can cause clunking noises, loose steering feel, and uneven tire wear.

What year Audi A6 to stay away from?

Years to avoid for the Audi A6 include 2000-2002, 2005-2006, and 2012 due to common electrical issues, airbag problems, and oil consumption. Additionally, some model years have specific recalls, such as 2014-2016 for potential fuel leaks and certain 2018-2022 models for issues with the gateway control unit or fuel level indicator. 
You can watch this video for a detailed breakdown of Audi A6 years to avoid: 54sSimple Mechanic AdviceYouTube · Jan 5, 2025
Years with known issues

• 2000-2002: Prone to widespread electrical faults and widespread oil consumption issues. 
• 2005-2006: Common issues include electrical problems and oil consumption. 
• 2012: Has a history of multiple recalls, including recalls for the side guard head curtain airbag and the electric coolant pump. 
• 2014: A recall for an auxiliary heater element was issued for cars built between July 8 and October 31, 2014. 
• 2014-2016: Some models from this period were subject to recalls for fuel leaks. 
• 2016: A recall was issued for faulty airbags and seatbelt tensioners for some cars built between May 1 and October 30, 2016. 
• 2018-2021: Some cars had recalls for incorrect seat belt warnings. 
• 2018-2022: A recall was issued for potential water ingress into gateway control units and some models have a fuel level indicator defect. 
• 2020: Recalls were issued for a starter alternator on certain engines and a defect in the front passenger airbag. 

General maintenance and reliability

• The C7.5 generation (2014 and newer) is generally considered more reliable, but may still require attention for issues like the water pump and PCV valve, particularly after 80,000 miles. 
• Routine maintenance is crucial for any Audi A6, especially after 100,000 miles. 
• While many specific model years have known issues, overall, the Audi A6 has an average reliability rating, and its long-term reliability depends heavily on proper maintenance. 

How big is the Audi A6 2018?

The 2018 Audi A6 has a length of about 194.2 inches, a width of 73.8 inches (without mirrors), and a height of 57.8 inches, with a wheelbase of 114.6 inches. Its interior features include front headroom of 37.2 inches and front legroom of 41.3 inches. The trunk offers a cargo capacity of 14.1 cubic feet.
 
Exterior dimensions

• Length: 194.2 inches
• Width (without mirrors): 73.8 inches
• Height: 57.8 inches
• Wheelbase: 114.6 inches 

Interior dimensions

• Front Headroom: 37.2 inches
• Front Legroom: 41.3 inches
• Front Shoulder Room: 57.5 inches
• Rear Headroom: 37.8 inches
• Rear Legroom: 37.4 inches
• Rear Shoulder Room: 56.3 inches 

Cargo and other

• Trunk Volume: 14.1 cubic feet
• Passenger Volume: 97.2 cubic feet 

Is the Audi A6 2018 a good car?

Athletic handling, stylish looks, long list of standard and optional features. So-so trunk space, desirable all-wheel drive ups the cost, a bit long in the tooth. The Audi A6 is a good-handling, comfortable, luxury sedan with snazzy looks, an upscale interior, spirited performance, and a long list of features.