Audi RS3 vs Mercedes-Benz CLA45 AMG S
Side-by-side comparison from manufacturer specifications, NHTSA safety data, and live dealer listings.
Vehicles
Vehicles
2026 Mercedes-Benz CLA45 AMG S
Overview
| Spec | Audi RS3RS 3 Sedan | Mercedes-Benz CLA45 AMG SAMG CLA 45 S |
|---|---|---|
| Selected trim | RS 3 Sedan | AMG CLA 45 S |
| Body style | Sedan | Sedan |
| Drivetrain | all wheel drive | all wheel drive |
| Fuel type | premium unleaded (required) | premium unleaded (required) |
| Transmission | 7-speed automated manual | 8-speed automated manual |
| Engine type | gas | gas |
| Model year | 2026 | 2026 |
Pricing & market
| Spec | Audi RS3RS 3 Sedan | Mercedes-Benz CLA45 AMG SAMG CLA 45 S |
|---|---|---|
| MSRP | $66,100 (best) | $67,550 |
| For sale now | 0 | 0 |
Fuel economy & range
| Spec | Audi RS3RS 3 Sedan | Mercedes-Benz CLA45 AMG SAMG CLA 45 S |
|---|---|---|
| Combined MPG | 23 MPG | 23 MPG |
| City MPG | 20 MPG | 20 MPG |
| Highway MPG | 29 MPG (best) | 28 MPG |
| Fuel tank | 14.5 gal (best) | 13.5 gal |
Performance
| Spec | Audi RS3RS 3 Sedan | Mercedes-Benz CLA45 AMG SAMG CLA 45 S |
|---|---|---|
| Horsepower | 394 hp | 416 hp (best) |
| Torque | 369 lb-ft | 369 lb-ft |
| Engine size | 2.5 L (best) | 2 L |
| Cylinders | I5 | I4 |
Size & capability
| Spec | Audi RS3RS 3 Sedan | Mercedes-Benz CLA45 AMG SAMG CLA 45 S |
|---|---|---|
| Seating | 5 seats | 5 seats |
| Doors | 4 | 4 |
| Cargo volume | 8.3 cu ft | 11.6 cu ft (best) |
| Payload | 860 lbs (best) | — |
| Curb weight | 3,627 lbs (best) | 3,791 lbs |
| Wheelbase | 103.6 in | 107.4 in (best) |
| Length | 178.5 in | 184.8 in (best) |
| Width | 72.9 in | 73.1 in (best) |
| Height | 54.8 in | 55.4 in (best) |
Safety & recalls
| Spec | Audi RS3RS 3 Sedan | Mercedes-Benz CLA45 AMG SAMG CLA 45 S |
|---|---|---|
| Open recalls (YMM scope) | None reported | None reported |
Highlighted values indicate the better figure for that spec when a clear winner exists. Specs reflect the selected trim for each vehicle. Drag a vehicle header to reorder columns. MSRP and specifications are manufacturer data; listing prices and inventory come from live dealer listings. Safety ratings are from NHTSA.
Trim overview
All available trims with MSRP. The trim selected above is highlighted; comparison specs use that selection.
| Trim | Audi RS3 | Mercedes-Benz CLA45 AMG S |
|---|---|---|
| 1 | RS 3 Sedan $66,100 MSRP(Currently comparing) | AMG CLA 45 S $67,550 MSRP(Currently comparing) |