The 2011 Audi A8 Quattro sits in the modern luxury flagship category, blending aluminum-intensive engineering, all-wheel-drive confidence, and the understated presence that has long defined Audi’s top sedan. Buyers looking at this exact model are usually balancing original road manners with the realities of wheel and tire replacement on a high-end touring car. The 2011 Audi A8 Quattro uses radial tires in two fitments, 255/45R19 and 265/40R20, so the first step is confirming which wheel diameter is on the car. Once that is settled, the decision becomes choosing the right metric radial size for the vehicle’s actual setup, appearance, and intended use.
Which Tire Size Is Right for The 2011 Audi A8 Quattro
The 2011 Audi A8 Quattro uses two primary tire sizes, and both are radial fitments tied to different wheel diameters. Because 19-inch and 20-inch rims are both used across the covered sub-models, the first thing to confirm is the wheel diameter currently on the car before comparing tire choices within the correct size.
255/45R19 is a metric radial size in which 255 indicates section width in millimeters, 45 is the aspect ratio, R marks radial construction, and 19 is the rim diameter in inches. On the 2011 Audi A8 Quattro, this size suits a 19-inch wheel setup and reflects the modern tire sizing convention used on contemporary luxury sedans. Its dimensions place it within the vehicle’s correct fitment family without drifting into older bias-ply or vintage alphanumeric sizing. This is the size to evaluate when the car is equipped with 19-inch wheels and the goal is to stay with the proper modern radial format.
265/40R20 is also a metric radial size, with 265 showing section width in millimeters, 40 identifying the aspect ratio, R denoting radial construction, and 20 indicating a 20-inch rim. For the 2011 Audi A8 Quattro, this fitment belongs to cars running the larger 20-inch wheel diameter rather than the 19-inch setup. The lower profile relative to the 19-inch size keeps the tire in the same general overall fitment range while matching the larger wheel. This is the size to use only after confirming that the car actually carries 20-inch rims.
Tire fitment is straightforward across the covered 2011 Audi A8 Quattro sub-models because each one uses the same two primary radial sizes. The important check is not trim level so much as verifying whether the car is on 19-inch or 20-inch wheels before selecting a tire.
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2011 Audi A8 Quattro Base
The 2011 Audi A8 Quattro Base uses the same two radial fitments found elsewhere in the model range, so tire selection comes down to the wheel diameter actually installed on the car. Once the 19-inch or 20-inch setup is confirmed, the focus shifts to choosing the proper metric radial size for that wheel.
The 2011 Audi A8 Quattro L 4.2 shares the same two primary radial tire sizes as the other covered sub-models. That means the practical fitment decision is confirming whether the sedan is equipped with 19-inch or 20-inch wheels before replacing tires.
The 2011 Audi A8 Quattro L W12 follows the same tire-size pattern as the rest of the range, with both primary fitments built around modern radial construction. Tire choice starts with checking the wheel diameter on the car, then matching the correct metric size to that setup.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Frequently Asked Questions
Owners of a 2011 Audi A8 Quattro usually need clarity on the two correct tire sizes, the 19-inch versus 20-inch wheel question, and the practical checks that matter before replacing tires on a modern luxury sedan.
Tire Size & Fitment
What tire size fits a 2011 Audi A8 Quattro?
The 2011 Audi A8 Quattro uses two primary tire sizes: 255/45R19 and 265/40R20. Both are radial metric fitments, and both appear across the covered A8 Quattro sub-models, including Base, L 4.2, and L W12.
The key is matching the tire to the wheel diameter already on the car. A sedan with 19-inch wheels needs 255/45R19, while a car with 20-inch wheels needs 265/40R20. Before replacing anything, confirm the actual wheel size, then check the current setup for adequate clearance and any changes from factory-style wheel or suspension dimensions.
What size rim does a 2011 Audi A8 Quattro use?
The 2011 Audi A8 Quattro uses either a 19-inch or 20-inch rim, depending on which of its two primary tire sizes is on the car. The 255/45R19 tire fits a 19-inch rim, and the 265/40R20 tire fits a 20-inch rim.
That rim diameter difference is the first thing to verify because the two tire sizes are not meant for the same wheel. Checking the wheel itself is more reliable than guessing from trim level alone, especially on a vehicle that may have seen wheel changes over time. Once rim diameter is confirmed, the rest of the fitment decision becomes much simpler.
Do all 2011 Audi A8 Quattro sub-models use the same tire size?
The covered 2011 Audi A8 Quattro sub-models all share the same pair of primary tire sizes: 255/45R19 and 265/40R20. That includes the Base, L 4.2, and L W12, so the fitment pattern is consistent across the range rather than being tied to one trim alone.
Even with that consistency, the correct replacement still depends on the wheel diameter on the individual car. A sub-model may be associated with both sizes, so trim name by itself does not settle the tire decision. Taking a moment to confirm the current wheel setup helps prevent ordering a 19-inch tire for a 20-inch wheel, or the reverse.
Choosing the Right Tire
What should I consider when choosing a 255/45R19 or 265/40R20 tire for a 2011 Audi A8 Quattro?
Start with the exact size that matches the wheel on the car, since the 2011 Audi A8 Quattro uses either 255/45R19 or 265/40R20. Both are modern radial sizes, so the basic decision is not bias-ply versus radial, but selecting the proper metric fitment for the actual wheel diameter.
After size is confirmed, look at the vehicle’s intended use, the condition of the wheels, and whether the car remains on its original-style setup. An A8 used primarily for highway touring may call for different priorities than one that sees occasional collector use. It also helps to verify that no aftermarket wheels or suspension changes have altered the space available around the tire.
How do I choose between the available 2011 Audi A8 Quattro tire sizes?
The two sizes are not alternatives for the same wheel; they correspond to different rim diameters. A 2011 Audi A8 Quattro with 19-inch wheels uses 255/45R19, while one with 20-inch wheels uses 265/40R20, so the correct choice depends on the wheel currently installed.
That makes wheel confirmation more important than trim identification when replacing tires on this model. Looking at the sidewall of the existing tire and measuring or confirming the wheel diameter will usually answer the question quickly. Once the correct size is established, compare tire options within that size rather than trying to decide between the two fitments.
What rim-fitment details matter when choosing tires for a 2011 Audi A8 Quattro?
Rim diameter is the most important rim-fitment detail on the 2011 Audi A8 Quattro because the vehicle uses both 19-inch and 20-inch tire sizes. The tire must match the wheel diameter exactly, so a 255/45R19 belongs on a 19-inch rim and a 265/40R20 belongs on a 20-inch rim.
Wheel width and the overall wheel setup matter as well, especially if the car has been changed from its original-style configuration. A replacement tire should be evaluated alongside the wheel’s dimensions, the car’s current ride height, and available space at the fender and steering components. Those checks are especially worthwhile on a luxury sedan with low-profile modern radial sizes.
Restoration & Appearance
Does correct tire fitment matter for a 2011 Audi A8 Quattro restoration?
Yes, correct tire fitment matters because the 2011 Audi A8 Quattro was designed around specific modern radial sizes tied to 19-inch and 20-inch wheel setups. Using the proper size preserves the car’s intended visual balance and helps keep the overall presentation consistent with its original luxury-sedan character.
A restoration-minded owner should begin by confirming whether the car is being returned to a 19-inch or 20-inch wheel arrangement. From there, matching the correct metric radial size is more important than chasing a broader tire trend. When originality matters closely, it is wise to compare the car against marque-specific references and the actual wheel package installed.
Which tire should I choose for a period-style 2011 Audi A8 Quattro?
A period-style choice for a 2011 Audi A8 Quattro starts with staying in the correct modern radial format and using the size that matches the car’s wheel diameter. That means 255/45R19 for a 19-inch setup or 265/40R20 for a 20-inch setup, rather than moving into an unrelated sizing convention.
Because this is a modern flagship sedan, period-style appearance is more about preserving the proper overall stance than recreating a vintage sidewall treatment. Confirm the wheel package first, then select a tire that maintains the car’s clean, contemporary profile. Cars that have been fitted with aftermarket wheels may need extra scrutiny before they are brought back toward a restoration-oriented look.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2011 Audi A8 Quattro?
Yes, modifications can affect tire fitment on a 2011 Audi A8 Quattro even when the tire size itself is correct. Aftermarket wheels, changes in wheel width or offset, lowered suspension, or body alterations can all change the space available for a 255/45R19 or 265/40R20 tire.
A car that no longer sits on its original-style setup should be checked carefully before new tires are installed. Tire-to-fender clearance, inner clearance at suspension components, and steering clearance all deserve attention. This matters most when replacing low-profile modern radials, since even a small change in wheel setup can have a noticeable effect on fitment.
What should I inspect before driving a 2011 Audi A8 Quattro on new tires?
Before driving a 2011 Audi A8 Quattro on new tires, inspect the wheels for damage, confirm the correct tire size for the wheel diameter, and make sure the tires are properly inflated. It is also smart to look over the suspension and steering components for wear that could affect how the new tires track and wear.
A short check of tread seating, valve stems, and any signs of rubbing after installation can prevent bigger problems later. On a luxury sedan with 19-inch or 20-inch fitments, alignment condition also matters because uneven settings can quickly spoil a new set of tires. A cautious road test helps confirm that everything feels stable and clears properly.
What should I check before a longer drive in a 2011 Audi A8 Quattro?
Before a longer drive, check tire pressure, inspect the sidewalls and tread for cuts or bulges, and confirm that the tires match the wheel size on the car. A 2011 Audi A8 Quattro running 19-inch wheels should be on 255/45R19 tires, while a 20-inch setup should be on 265/40R20 tires.
It also helps to look for uneven wear that might point to alignment or suspension issues before highway use. Cars that spend long periods parked deserve extra attention, since age-related cracking or slow air loss can appear even when tread depth still looks acceptable. A quick visual inspection around all four corners is time well spent before any extended trip.
