Car comparison

BMW 4 Series Gran Coupe (G26) 420ivsBMW X3 (G01 LCI) · Facelift 2021 20i

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

New comparison

BMW 4 Series Gran Coupe (G26)

420i

170 hp1597 ccGasolineRWDAutomaticTurbochargedCoupe2021-2024
VS

BMW X3 (G01 LCI) · Facelift 2021

20i

170 hp1597 ccGasolineRWDAutomaticTurbocharged2021-2024

Comparison overview

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

Best choices

BMW 4 Series Gran Coupe (G26) 420i

  • Quickest 0-100 km/h
    8.6 s
  • Fastest top speed
    227 km/h
    141 mph
  • Most powerful
    170 hp
    127 kW
  • Highest torque
    250 Nm
    184 lb-ft
  • Lightest
    1,620 kg
    3,571 lb
  • Best power-to-weight
    105 hp/t
    78 kW/t
    9.5 kg/hp
  • Best overall score
    53/100
  • Best performance score
    45/100
  • Best economy score
    85/100

Specification comparison

Specification comparison
ModelBMW4 Series Gran Coupe (G26)420iBMWX3 (G01 LCI)Facelift 202120i
Power
170hp127kW
170hp127kW
Torque
250Nm184lb-ft
250Nm184lb-ft
Curb weight
1,620kg3,571lb
1,710kg3,770lb
Gross weight
2,175kg4,795lb
2,330kg5,137lb
Top speed
227 km/h
141 mph
208 km/h
129 mph
To 99% top speed
104.2s99% target: 225 km/h / 140 mph
Calculated
109.5s99% target: 206 km/h / 128 mph
Calculated
0-100 km/h
8.6s
9.1s
0-200 km/h
41.2s
Calculated
70.4s
Calculated
0-60 mph
8.1s
Calculated
8.6s
Calculated
Fuel consumption
8.1L/100 km29mpg US34.9mpg UK
-
Fuel consumption city
8L/100 km29.4mpg US35.3mpg UK
-
Fuel consumption highway
7L/100 km33.6mpg US40.4mpg UK
-
Quarter mile
16.2s
Calculated
16.6s
Calculated
Power-to-weight
105hp/t78kW/t48hp/1000 lb
Calculated
99hp/t74kW/t45hp/1000 lb
Calculated
Torque-to-weight
154Nm/t103lb-ft/ton
Calculated
146Nm/t98lb-ft/ton
Calculated
Estimated range
728km453mi
Calculated
-
Displacement
1,597cc97cu in
1,597cc97cu in
Length
4,783mm188in
4,708mm185in
Width
1,852mm73in
1,891mm74in
Height
1,442mm57in
1,676mm66in
Wheelbase
2,856mm112in
2,864mm113in
Front track
1,595mm63in
1,620mm64in
Rear track
1,623mm64in
1,636mm64in
Ground clearance-
204mm8in
Trunk volume
470L
550L
Max trunk volume
1,290L
1,600L
Doors
5
5
Seats
5
5
Fuel tank
59L
65L

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.

BMW 4 Series Gran Coupe (G26) 420iBMW X3 (G01 LCI) Facelift 2021 20iPowerTorque
  • BMW 4 Series Gran Coupe (G26) 420i: Power / Torque
  • BMW X3 (G01 LCI) Facelift 2021 20i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Gran Coupe (G26)420i5,000-5,500 rpm2,000-4,400 rpm5,750 rpm
BMWX3 (G01 LCI)Facelift 202120i5,000-5,500 rpm2,000-4,400 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Gran Coupe (G26)420iBMWX3 (G01 LCI)Facelift 202120i
Acceleration checkpoints
0-60 mph
0-97 km/h
8.1 s
8.6 s
0-100 km/h
0-62 mph
8.6 s
9.1 s
0-200 km/h
0-124 mph
41.2 s
70.4 s
Top speed
227 km/h
141 mph
208 km/h
129 mph
Drag race simulation
60 ft
18 m
2.6 s
2.5 s
330 ft
101 m
7.0 s
7.0 s
1/8 mile
201 m
10.6 s
10.7 s
1000 ft
305 m
13.7 s
13.9 s
1/4 mile
402 m
16.2 s
16.6 s
Trap speed
1/4 mile
402 m
142 km/h
88 mph
135 km/h
84 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
170 hp
127 kW
BMWX3 (G01 LCI)Facelift 202120i
170 hp
127 kW

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
250 Nm
184 lb-ft
BMWX3 (G01 LCI)Facelift 202120i
250 Nm
184 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
1,620 kg
3,571 lb
BMWX3 (G01 LCI)Facelift 202120i
1,710 kg
3,770 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
227 km/h
141 mph
BMWX3 (G01 LCI)Facelift 202120i
208 km/h
129 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i8.6 s
BMWX3 (G01 LCI)Facelift 202120i9.1 s

The biggest 0-100 km/h difference is between BMW 4 Series Gran Coupe (G26) 420i and BMW X3 (G01 LCI) Facelift 2021 20i: 0.5 s.

Power-to-weight comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
105 hp/t
78 kW/t
9.5 kg/hp
BMWX3 (G01 LCI)Facelift 202120i
99 hp/t
74 kW/t
10.1 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Gran Coupe (G26)420i
170 hp
127 kW
8.6 s
227 km/h
141 mph
BMWX3 (G01 LCI)Facelift 202120i
170 hp
127 kW
9.1 s
208 km/h
129 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
BMW4 Series Gran Coupe (G26)420i
Power
170 hp
127 kW
0-100 km/h8.6 s
Top speed
227 km/h
141 mph
Doors/seats
5 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
4,783 mm
188.3 in
Height
1,442 mm
56.8 in
BMWX3 (G01 LCI)Facelift 202120i
Power
170 hp
127 kW
0-100 km/h9.1 s
Top speed
208 km/h
129 mph
Doors/seats
5 doors
5 seats
Trunk
550 L
19.4 cu ft
Length
4,708 mm
185.4 in
Height
1,676 mm
66.0 in

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Gran Coupe (G26)420iBMWX3 (G01 LCI)Facelift 202120i
Power
170 hp
127 kW
170 hp
127 kW
Torque
250 Nm
184 lb-ft
250 Nm
184 lb-ft
Acceleration
8.6 s
9.1 s
Top speed
227 km/h
141 mph
208 km/h
129 mph
Lightness
1,620 kg
3,571 lb
1,710 kg
3,770 lb
Fuel consumption
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
-
Practicality
Doors/seats
5 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
4,783 mm
188.3 in
Height
1,442 mm
56.8 in
Doors/seats
5 doors
5 seats
Trunk
550 L
19.4 cu ft
Length
4,708 mm
185.4 in
Height
1,676 mm
66.0 in
Range score
728 km
453 mi
-
Trunk score
470 L
16.6 cu ft
550 L
19.4 cu ft
Power-to-weight score
105 hp/t
78 kW/t
9.5 kg/hp
99 hp/t
74 kW/t
10.1 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
VehicleBMW 4 Series Gran Coupe (G26) 420i
Consumption8.1 L/100 km29 mpg US34.9 mpg UK
Cost / 100 km14.17 LC100 km
Cost / 100 mi22.81 LC100 mi
Annual fuel used1,215 L321 US gal267 UK gal
Annual fuel cost2,126 LC/year

Head-to-head comparisons

BMW 4 Series Gran Coupe (G26) 420i

  • Is 90 kg lighter
  • Is 0.5 s quicker from 0-100 km/h
  • Has 19 km/h (12 mph) higher top speed
  • Has 6 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio

Cons

  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Gran Coupe (G26) 420i
BMW X3 (G01 LCI) 20i
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2 vehicles selected

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BMW 4 Series Gran Coupe (G26) 420i vs BMW X3 (G01 LCI) · Facelift 2021 20i - car comparison - FastVsFaster