The 2014 Audi A8 Quattro sits at the intersection of full-size luxury, all-weather capability, and modern high-speed touring, giving owners a sedan that feels substantial without losing its precision. In this generation, the A8’s understated design and Quattro drivetrain make tire choice especially important because ride quality, steering response, and stance all depend on getting the wheel-and-tire package right. This model uses radial tires in either 255/45R19 or 265/40R20, so the first decision is confirming which wheel diameter is on the car. From there, the focus shifts to preserving the right overall proportions, maintaining clearance, and matching the tire to the car’s intended road use.
Which Tire Size Is Right for The 2014 Audi A8 Quattro
The 2014 Audi A8 Quattro uses two primary tire sizes, and both are radial fitments. The key difference is wheel diameter: 255/45R19 fits a 19-inch rim, while 265/40R20 fits a 20-inch rim. Because every covered sub-model can use either size, the first thing to confirm is which wheel package is actually on the car before comparing tire options.
255/45R19 is a metric radial size in which 255 identifies the nominal section width in millimeters, 45 is the aspect ratio, R denotes radial construction, and 19 is the rim diameter in inches. On the 2014 Audi A8 Quattro, this size supports the car’s modern luxury-sedan fitment with the proportions intended for a 19-inch wheel. It is a useful choice for owners who want to stay with the 19-inch setup and keep tire selection centered on the correct metric sizing format. Wheel diameter and actual wheel width should still be confirmed before replacement.
265/40R20 is a metric radial size where 265 is the nominal section width in millimeters, 40 is the aspect ratio, R indicates radial construction, and 20 identifies the rim diameter in inches. For the 2014 Audi A8 Quattro, this size corresponds to the larger 20-inch wheel fitment and brings a slightly wider, lower-profile tire format than the 19-inch alternative. It should be evaluated by owners who already have the 20-inch wheel package or are replacing tires on that setup. Checking wheel width, clearance, and overall vehicle configuration remains important before installation.
Tire fitment is straightforward across the covered 2014 Audi A8 Quattro sub-models because each one uses the same two radial size options. The important step is not choosing by trim level alone, but confirming whether the car is equipped with 19-inch or 20-inch wheels.
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2014 Audi A8 Quattro Base
The 2014 Audi A8 Quattro Base uses the same two radial tire fitments found across the model range. Tire selection comes down to confirming the actual wheel diameter on the car and then choosing the correct metric size to match that setup.
The 2014 Audi A8 Quattro L shares the same tire-size pattern as the other covered sub-models, with both 19-inch and 20-inch radial fitments in use. That means the practical next step is checking the installed wheels rather than assuming fitment from the L designation alone.
The 2014 Audi A8 Quattro L TDI follows the same fitment approach, using either of the two metric radial sizes depending on wheel package. Replacing tires correctly starts with confirming whether the car carries the 19-inch or 20-inch wheel arrangement.
The 2014 Audi A8 Quattro L W12 uses the same pair of primary radial tire sizes as the rest of the covered lineup. Choosing the right replacement depends on matching the tire to the wheel diameter already on the vehicle and verifying fitment if anything has been changed.
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
Common questions for the 2014 Audi A8 Quattro usually center on the two tire sizes, the difference between the 19-inch and 20-inch wheel fitments, and what owners should inspect before replacing tires on a luxury all-wheel-drive sedan.
Tire Size & Fitment
What tire size fits a 2014 Audi A8 Quattro?
The 2014 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, L TDI, and L W12.
The correct choice depends on the wheel diameter actually installed on the car. A8 sedans in this range can be encountered with either 19-inch or 20-inch wheels, so the safest approach is to confirm the wheel size first, then match the tire size to that setup rather than selecting by trim name alone.
What size rim does a 2014 Audi A8 Quattro use?
A 2014 Audi A8 Quattro uses either a 19-inch or 20-inch rim, depending on which tire size is on the vehicle. The 255/45R19 tire fits a 19-inch rim, while the 265/40R20 tire fits a 20-inch rim.
Rim diameter is the first fitment point to verify because the two tire sizes are not meant for the same wheel. It also helps to confirm actual wheel width and make sure the car has not been changed to an aftermarket wheel package, since wheel dimensions can affect tire profile, clearance, and overall fit.
Do all 2014 Audi A8 Quattro sub-models use the same tire size?
The covered 2014 Audi A8 Quattro sub-models share the same tire-size choices rather than having separate trim-specific sizes. Base, L, L TDI, and L W12 can all use either 255/45R19 or 265/40R20, and both are radial fitments.
That makes sub-model selection less important than wheel confirmation. Instead of assuming the correct tire from the badge on the trunk, check the actual wheel diameter and the tire size already mounted on the car, especially if the vehicle has been fitted with a different wheel package at some point.
Choosing the Right Tire
What should I consider when choosing a tire for a 2014 Audi A8 Quattro?
Start with the correct size for the wheel package on the car: 255/45R19 for a 19-inch rim or 265/40R20 for a 20-inch rim. Since the 2014 Audi A8 Quattro is a modern luxury sedan with all-wheel-drive capability, keeping the correct metric radial format is an important part of proper replacement.
After size, look at wheel compatibility, intended driving use, and overall condition of the car’s suspension and alignment. Owners replacing one tire or one axle set should also consider how closely the replacement matches the existing tires in size and wear, since mixed tire setups can affect ride quality and driveline behavior.
How do I choose between 255/45R19 and 265/40R20 tires for a 2014 Audi A8 Quattro?
Choosing between 255/45R19 and 265/40R20 is not a matter of preference alone, because each size matches a different wheel diameter. The 19-inch setup uses 255/45R19, while the 20-inch setup uses 265/40R20, and both are proper radial fitments for the 2014 Audi A8 Quattro.
The practical decision is tied to the wheels already on the car. A buyer should confirm the actual rim diameter, inspect the current tire sidewall markings, and verify that no previous owner changed the wheel package. That prevents ordering a tire that matches the model but not the vehicle’s current wheel configuration.
What rim-fitment details should I compare when choosing 2014 Audi A8 Quattro tires?
The most important rim-fitment detail is diameter, because the 2014 Audi A8 Quattro uses both 19-inch and 20-inch wheel setups. A 255/45R19 tire belongs on a 19-inch rim, and a 265/40R20 tire belongs on a 20-inch rim.
Beyond diameter, wheel width and any aftermarket offset changes deserve attention before replacement. Those details can influence sidewall shape and clearance even when the printed tire size appears correct. Looking over the current wheel specifications and checking for any suspension or stance changes helps avoid fitment surprises after mounting.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Audi A8 Quattro?
Yes. A 2014 Audi A8 Quattro may start with either a 19-inch or 20-inch wheel-and-tire package, but aftermarket wheels, suspension changes, or body modifications can alter how a tire fits even when the vehicle still appears stock at a glance.
Changes in wheel width, offset, ride height, or alignment can affect fender clearance, steering clearance, and the way the tire sits on the wheel. Any A8 that has been lowered, fitted with custom wheels, or previously repaired should be measured carefully before replacement rather than relying only on the original model fitment.
What should I inspect before driving a 2014 Audi A8 Quattro on new tires?
Before driving on new tires, inspect the wheel size, verify the installed tire size matches the car’s wheel package, and check inflation pressure. It is also wise to look over the wheels for damage and confirm that the tires seat properly and clear the suspension and bodywork.
A road-ready inspection should also include alignment condition, visible suspension wear, and any signs of uneven wear on the previous tires. On a heavy luxury sedan such as the A8 Quattro, issues like worn control-arm components or poor alignment can quickly affect how a fresh set of tires rides and wears.
How often should tires on a 2014 Audi A8 Quattro be inspected?
Tires on a 2014 Audi A8 Quattro should be inspected regularly, not just when tread looks low. Routine checks should include air pressure, tread depth, uneven wear, cuts, bulges, and sidewall damage, along with a quick look for any vibration or pull that develops while driving.
A sensible habit is to inspect them before longer trips and at regular intervals throughout the year, especially if the car sees seasonal use or sits for extended periods. Catching air loss, alignment-related wear, or aging early helps protect the wheel package and keeps replacement decisions focused on maintenance rather than emergency tire failure.
