2021 Audi A4 S line quattroFuel Economy & MPG Ratings
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Trim Comparison
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic (AM-S7) | Premium Hybrid | 24 | 31 | 27 | $3,050 |
Based on gasoline at $3.67/gal, 15,000 miles/year
vs. average new vehicle
Environment
- CO₂ Tailpipe Emissions
- 331 g/mile
- Annual Petroleum Consumption
- 11.0 barrels
Specifications
- Engine
- 2L 4-cyl
- Transmission
- Automatic
- Drivetrain
- AWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 2L, 4-cylinder
- Induction Type
- SIDI; Mild Hybrid
- Efficiency Tech
- Auto Start-Stop
- Fuel Type
- Premium Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $2,494/yr | — |
| California | $5.957/gal | $3,309/yrHIGHEST | +$815 |
| Texas | $3.888/gal | $2,160/yrLOWEST | $-334 |
| Florida | $4.136/gal | $2,298/yr | $-196 |
| New York | $4.522/gal | $2,512/yr | +$18 |
| Ohio | $4.510/gal | $2,506/yr | +$12 |
| Washington | $5.591/gal | $3,106/yr | +$612 |
| Colorado | $4.618/gal | $2,566/yr | +$72 |
| Minnesota | $4.344/gal | $2,413/yr | $-81 |
| Massachusetts | $4.448/gal | $2,471/yr | $-23 |
Calculated at 15,000 miles/year (EPA standard assumption) using 27 MPG combined. Regular gasoline prices. Actual costs vary.
Recall History
Source: NHTSA✓No recalls reported for this vehicle.
Owner-Reported Problems11 complaints
Source: NHTSANHTSA has received 11 owner complaints for the 2021 Audi A4 S line quattro. Top reported issues include advanced safety (adas), electrical system and speed control. The data below is sourced from consumer complaints filed directly with NHTSA.
Problems by System / Component
2021 Audi A4 S line quattro problems by category: Advanced Safety (ADAS): 4 complaints, Electrical System: 3 complaints, Speed Control: 2 complaints, Power Train: 2 complaints, Suspension: 2 complaints, Engine: 1 complaints, Air Bags: 1 complaints, Wheels & Tires: 1 complaints.
Sample Owner Complaints
Complaint data is sourced from the NHTSA Complaints Database. Reports are filed by vehicle owners and may not reflect confirmed defects. Last updated via NHTSA API.