Car comparison

Mercedes-Benz A-class (W177) AMG A 45 SvsAUDI RS3 Sportback (8Y) 2.5 TFSI

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

Mercedes-Benz A-class (W177)

AMG A 45 S

421 hp1991 ccGasolineAWDDual-clutchTurbochargedHatchback2019-2022
VS

AUDI RS3 Sportback (8Y)

2.5 TFSI

400 hp2480 ccGasolineAWDAutomaticTurbochargedHatchback2021-2024

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

Mercedes-Benz A-class (W177) AMG A 45 S

  • Fastest top speed
    280 km/h
    174 mph Unrestricted
    270 km/h
    168 mph Restricted
  • Most powerful
    421 hp
    314 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,550 kg
    3,417 lb
  • Best power-to-weight
    272 hp/t
    203 kW/t
    3.7 kg/hp
  • Lowest combined fuel consumption
    8.4 L/100 km
    28.0 mpg US
    33.6 mpg UK
  • Lowest city consumption
    10.5 L/100 km
    22.4 mpg US
    26.9 mpg UK
  • Lowest CO2 emissions
    192 g/km
  • Largest trunk
    370 L
  • Best overall score
    79/100
  • Best performance score
    81/100
  • Best economy score
    84/100
  • Best practicality score
    74/100

Specification comparison

Specification comparison
ModelMercedes-BenzA-class (W177)AMG A 45 SAUDIRS3 Sportback (8Y)2.5 TFSI
Power
421hp314kW
400hp298kW
Torque
500Nm369lb-ft
500Nm369lb-ft
Curb weight
1,550kg3,417lb
1,570kg3,461lb
Gross weight
2,080kg4,586lb
2,075kg4,575lb
Top speed
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
43.7s99% target: 277 km/h / 172 mph
Calculated
44.3s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
3.9s
3.8s
0-200 km/h
11.4s
Calculated
12.7s
Calculated
0-60 mph
3.7s
Calculated
3.6s
Calculated
Fuel consumption
8.4L/100 km28mpg US33.6mpg UK
8.8L/100 km26.7mpg US32.1mpg UK
Fuel consumption city
10.5L/100 km22.4mpg US26.9mpg UK
11.6L/100 km20.3mpg US24.4mpg UK
Fuel consumption highway
7.2L/100 km32.7mpg US39.2mpg UK
7.1L/100 km33.1mpg US39.8mpg UK
Quarter mile
11.7s
Calculated
11.8s
Calculated
Power-to-weight
272hp/t203kW/t123hp/1000 lb
Calculated
255hp/t190kW/t116hp/1000 lb
Calculated
Torque-to-weight
323Nm/t216lb-ft/ton
Calculated
318Nm/t213lb-ft/ton
Calculated
Estimated range
607km377mi
Calculated
625km388mi
Calculated
Displacement
1,991cc121cu in
2,480cc151cu in
Length
4,445mm175in
4,389mm173in
Width
1,850mm73in
1,851mm73in
Height
1,412mm56in
1,436mm57in
Wheelbase
2,729mm107in
2,631mm104in
Front track
1,597mm63in
1,592mm63in
Rear track
1,558mm61in
1,524mm60in
Ground clearance
97mm4in
-
Trunk volume
370L
282L
Max trunk volume
1,210L
1,104L
Doors
5
5
Seats
5
5
Fuel tank
51L
55L
CO2 emissions
192g/km
201g/km

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

Mercedes-Benz A-class (W177) AMG A 45 SAUDI RS3 Sportback (8Y) 2.5 TFSIPowerTorque
  • Mercedes-Benz A-class (W177) AMG A 45 S: Power / Torque
  • AUDI RS3 Sportback (8Y) 2.5 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzA-class (W177)AMG A 45 S6,750 rpm5,000-5,250 rpm7,000 rpm
AUDIRS3 Sportback (8Y)2.5 TFSI5,600-7,000 rpm2,250-5,600 rpm7,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzA-class (W177)AMG A 45 SAUDIRS3 Sportback (8Y)2.5 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
3.7 s
3.6 s
0-100 km/h
0-62 mph
3.9 s
3.8 s
0-200 km/h
0-124 mph
11.4 s
12.7 s
Top speed
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.1 s
2.0 s
330 ft
101 m
5.2 s
5.1 s
1/8 mile
201 m
7.7 s
7.7 s
1000 ft
305 m
9.9 s
9.9 s
1/4 mile
402 m
11.7 s
11.8 s
Trap speed
1/4 mile
402 m
202 km/h
126 mph
194 km/h
120 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
421 hp
314 kW
AUDIRS3 Sportback (8Y)2.5 TFSI
400 hp
298 kW

Mercedes-Benz A-class (W177) AMG A 45 S has 21 hp more than AUDI RS3 Sportback (8Y) 2.5 TFSI.

The biggest power difference is between AUDI RS3 Sportback (8Y) 2.5 TFSI and Mercedes-Benz A-class (W177) AMG A 45 S: 21 hp (16 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
500 Nm
369 lb-ft
AUDIRS3 Sportback (8Y)2.5 TFSI
500 Nm
369 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
1,550 kg
3,417 lb
AUDIRS3 Sportback (8Y)2.5 TFSI
1,570 kg
3,461 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
AUDIRS3 Sportback (8Y)2.5 TFSI
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S3.9 s
AUDIRS3 Sportback (8Y)2.5 TFSI3.8 s

Although Mercedes-Benz A-class (W177) AMG A 45 S has more power, AUDI RS3 Sportback (8Y) 2.5 TFSI is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between AUDI RS3 Sportback (8Y) 2.5 TFSI and Mercedes-Benz A-class (W177) AMG A 45 S: 0.1 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
AUDIRS3 Sportback (8Y)2.5 TFSI
8.8 L/100 km
26.7 mpg US
32.1 mpg UK

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
272 hp/t
203 kW/t
3.7 kg/hp
AUDIRS3 Sportback (8Y)2.5 TFSI
255 hp/t
190 kW/t
3.9 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
Mercedes-BenzA-class (W177)AMG A 45 S
607 km
377 mi
AUDIRS3 Sportback (8Y)2.5 TFSI
625 km
388 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzA-class (W177)AMG A 45 S
421 hp
314 kW
3.9 s
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
AUDIRS3 Sportback (8Y)2.5 TFSI
400 hp
298 kW
3.8 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
Mercedes-BenzA-class (W177)AMG A 45 S
Power
421 hp
314 kW
0-100 km/h3.9 s
Top speed
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
Doors/seats
5 doors
5 seats
Trunk
370 L
13.1 cu ft
Length
4,445 mm
175.0 in
Height
1,412 mm
55.6 in
AUDIRS3 Sportback (8Y)2.5 TFSI
Power
400 hp
298 kW
0-100 km/h3.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
282 L
10.0 cu ft
Length
4,389 mm
172.8 in
Height
1,436 mm
56.5 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
Mercedes-BenzA-class (W177)AMG A 45 S
Power
421 hp
314 kW
0-100 km/h3.9 s
Top speed
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
AUDIRS3 Sportback (8Y)2.5 TFSI
Power
400 hp
298 kW
0-100 km/h3.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.8 L/100 km
26.7 mpg US
32.1 mpg UK

Mercedes-Benz A-class (W177) AMG A 45 S is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
Mercedes-BenzA-class (W177)AMG A 45 S
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
3.9 s
AUDIRS3 Sportback (8Y)2.5 TFSI
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
3.8 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
Mercedes-BenzA-class (W177)AMG A 45 S
272 hp/t
203 kW/t
3.7 kg/hp
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
AUDIRS3 Sportback (8Y)2.5 TFSI
255 hp/t
190 kW/t
3.9 kg/hp
8.8 L/100 km
26.7 mpg US
32.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzA-class (W177)AMG A 45 SAUDIRS3 Sportback (8Y)2.5 TFSI
Power
421 hp
314 kW
400 hp
298 kW
Torque
500 Nm
369 lb-ft
500 Nm
369 lb-ft
Acceleration
3.9 s
3.8 s
Top speed
Unrestricted
280 km/h174 mph
Restricted
270 km/h168 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,550 kg
3,417 lb
1,570 kg
3,461 lb
Fuel consumption
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
Practicality
Doors/seats
5 doors
5 seats
Trunk
370 L
13.1 cu ft
Length
4,445 mm
175.0 in
Height
1,412 mm
55.6 in
Doors/seats
5 doors
5 seats
Trunk
282 L
10.0 cu ft
Length
4,389 mm
172.8 in
Height
1,436 mm
56.5 in
Range score
607 km
377 mi
625 km
388 mi
CO2 score
192 g/km
201 g/km
Trunk score
370 L
13.1 cu ft
282 L
10.0 cu ft
Power-to-weight score
272 hp/t
203 kW/t
3.7 kg/hp
255 hp/t
190 kW/t
3.9 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehicleMercedes-Benz A-class (W177) AMG A 45 SAUDI RS3 Sportback (8Y) 2.5 TFSI
Consumption8.4 L/100 km28 mpg US33.6 mpg UK8.8 L/100 km26.7 mpg US32.1 mpg UK
Cost / 100 km14.70 LC100 km15.40 LC100 km
Cost / 100 mi23.66 LC100 mi24.78 LC100 mi
Annual fuel used1,260 L333 US gal277 UK gal1,320 L349 US gal290 UK gal
Annual fuel cost2,205 LC/year2,310 LC/year

Head-to-head comparisons

Mercedes-Benz A-class (W177) AMG A 45 S

  • Has 21 hp more
  • Is 20 kg lighter
  • Has 20 km/h (12 mph) higher top speed
  • Uses 0.4 L/100 km less fuel
  • Has 17 hp/t better power-to-weight
  • Has 88 L more trunk volume
  • Emits 9 g/km less CO2

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Slowest 0-100 km/h

AUDI RS3 Sportback (8Y) 2.5 TFSI

  • Is 0.1 s quicker from 0-100 km/h
  • Has 18 km (11 mi) more estimated range

Pros

  • Quickest 0-100 km/h in this comparison
  • Best estimated range

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz A-class (W177) AMG A 45 S
AUDI RS3 Sportback (8Y) 2.5 TFSI
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