Car comparison

BMW 4 Series Gran Coupe (G26) 420ivsBMW 4 Series Coupe (F32) 418d

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 4 Series Coupe (F32)

418d

150 hp1995 ccDieselRWDManualTurbochargedCoupe2015-2016

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
  • Best power-to-weight
    105 hp/t
    78 kW/t
    9.5 kg/hp
  • Largest trunk
    470 L
  • Best overall score
    53/100
  • Best performance score
    45/100
  • Best practicality score
    69/100

BMW 4 Series Coupe (F32) 418d

  • Highest torque
    320 Nm
    236 lb-ft
  • Lightest
    1,460 kg
    3,219 lb
  • Lowest combined fuel consumption
    4.5 L/100 km
    52.3 mpg US
    62.8 mpg UK
  • Lowest city consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Lowest highway consumption
    3.9 L/100 km
    60.3 mpg US
    72.4 mpg UK
  • Best estimated range
    1,267 km
    787 mi
  • Best economy score
    95/100

Specification comparison

Specification comparison
ModelBMW4 Series Gran Coupe (G26)420iBMW4 Series Coupe (F32)418d
Power
170hp127kW
150hp112kW
Torque
250Nm184lb-ft
320Nm236lb-ft
Curb weight
1,620kg3,571lb
1,460kg3,219lb
Gross weight
2,175kg4,795lb
1,980kg4,365lb
Top speed
227 km/h
141 mph
215 km/h
134 mph
To 99% top speed
105.0s99% target: 225 km/h / 140 mph
Calculated
94.0s99% target: 213 km/h / 132 mph
Calculated
0-100 km/h
8.6s
8.6s
0-200 km/h
41.4s
Calculated
48.8s
Calculated
0-60 mph
8.1s
Calculated
8.1s
Calculated
Fuel consumption
8.1L/100 km29mpg US34.9mpg UK
4.5L/100 km52.3mpg US62.8mpg UK
Fuel consumption city
8L/100 km29.4mpg US35.3mpg UK
5.4L/100 km43.6mpg US52.3mpg UK
Fuel consumption highway
7L/100 km33.6mpg US40.4mpg UK
3.9L/100 km60.3mpg US72.4mpg UK
Quarter mile
16.2s
Calculated
16.2s
Calculated
Power-to-weight
105hp/t78kW/t48hp/1000 lb
Calculated
103hp/t77kW/t47hp/1000 lb
Calculated
Torque-to-weight
154Nm/t103lb-ft/ton
Calculated
219Nm/t147lb-ft/ton
Calculated
Estimated range
728km453mi
Calculated
1,267km787mi
Calculated
Displacement
1,597cc97cu in
1,995cc122cu in
Length
4,783mm188in
4,638mm183in
Width
1,852mm73in
1,825mm72in
Height
1,442mm57in
1,377mm54in
Wheelbase
2,856mm112in
2,810mm111in
Front track
1,595mm63in
1,545mm61in
Rear track
1,623mm64in
1,594mm63in
Ground clearance-
130mm5in
Trunk volume
470L
445L
Max trunk volume
1,290L
-
Doors
5
2
Seats
5
4
Fuel tank
59L
57L
CO2 emissions-
118g/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.

BMW 4 Series Gran Coupe (G26) 420iBMW 4 Series Coupe (F32) 418dPowerTorque
  • BMW 4 Series Gran Coupe (G26) 420i: Power / Torque
  • BMW 4 Series Coupe (F32) 418d: 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
BMW4 Series Coupe (F32)418d4,000 rpm1,500-3,000 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Gran Coupe (G26)420iBMW4 Series Coupe (F32)418d
Acceleration checkpoints
0-60 mph
0-97 km/h
8.1 s
8.1 s
0-100 km/h
0-62 mph
8.6 s
8.6 s
0-200 km/h
0-124 mph
41.4 s
48.8 s
Top speed
227 km/h
141 mph
215 km/h
134 mph
Drag race simulation
60 ft
18 m
2.6 s
2.6 s
330 ft
101 m
7.0 s
7.0 s
1/8 mile
201 m
10.6 s
10.6 s
1000 ft
305 m
13.6 s
13.7 s
1/4 mile
402 m
16.2 s
16.2 s
Trap speed
1/4 mile
402 m
142 km/h
88 mph
141 km/h
87 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
BMW4 Series Coupe (F32)418d
150 hp
112 kW

BMW 4 Series Gran Coupe (G26) 420i has 20 hp more than BMW 4 Series Coupe (F32) 418d.

The biggest power difference is between BMW 4 Series Coupe (F32) 418d and BMW 4 Series Gran Coupe (G26) 420i: 20 hp (15 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
BMW4 Series Coupe (F32)418d
320 Nm
236 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
BMW4 Series Coupe (F32)418d
1,460 kg
3,219 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
BMW4 Series Coupe (F32)418d
215 km/h
134 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
BMW4 Series Coupe (F32)418d8.6 s

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
BMW4 Series Coupe (F32)418d
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Coupe (F32) 418d and BMW 4 Series Gran Coupe (G26) 420i: 3.6 L/100 km.

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
BMW4 Series Coupe (F32)418d
103 hp/t
77 kW/t
9.7 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420i
728 km
453 mi
BMW4 Series Coupe (F32)418d
1,267 km
787 mi

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
BMW4 Series Coupe (F32)418d
150 hp
112 kW
8.6 s
215 km/h
134 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
BMW4 Series Coupe (F32)418d
Power
150 hp
112 kW
0-100 km/h8.6 s
Top speed
215 km/h
134 mph
Doors/seats
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,377 mm
54.2 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
BMW4 Series Gran Coupe (G26)420i
Power
170 hp
127 kW
0-100 km/h8.6 s
Top speed
227 km/h
141 mph
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
BMW4 Series Coupe (F32)418d
Power
150 hp
112 kW
0-100 km/h8.6 s
Top speed
215 km/h
134 mph
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

BMW 4 Series Coupe (F32) 418d 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
BMW4 Series Gran Coupe (G26)420i
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
8.6 s
BMW4 Series Coupe (F32)418d
4.5 L/100 km
52.3 mpg US
62.8 mpg UK
8.6 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
BMW4 Series Gran Coupe (G26)420i
105 hp/t
78 kW/t
9.5 kg/hp
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
BMW4 Series Coupe (F32)418d
103 hp/t
77 kW/t
9.7 kg/hp
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Gran Coupe (G26)420iBMW4 Series Coupe (F32)418d
Power
170 hp
127 kW
150 hp
112 kW
Torque
250 Nm
184 lb-ft
320 Nm
236 lb-ft
Acceleration
8.6 s
8.6 s
Top speed
227 km/h
141 mph
215 km/h
134 mph
Lightness
1,620 kg
3,571 lb
1,460 kg
3,219 lb
Fuel consumption
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
4.5 L/100 km
52.3 mpg US
62.8 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
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,377 mm
54.2 in
Range score
728 km
453 mi
1,267 km
787 mi
CO2 score
-
118 g/km
Trunk score
470 L
16.6 cu ft
445 L
15.7 cu ft
Power-to-weight score
105 hp/t
78 kW/t
9.5 kg/hp
103 hp/t
77 kW/t
9.7 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) 420iBMW 4 Series Coupe (F32) 418d
Consumption8.1 L/100 km29 mpg US34.9 mpg UK4.5 L/100 km52.3 mpg US62.8 mpg UK
Cost / 100 km14.17 LC100 km7.88 LC100 km
Cost / 100 mi22.81 LC100 mi12.67 LC100 mi
Annual fuel used1,215 L321 US gal267 UK gal675 L178 US gal148 UK gal
Annual fuel cost2,126 LC/year1,181 LC/year

Head-to-head comparisons

BMW 4 Series Gran Coupe (G26) 420i

  • Has 20 hp more
  • Has 12 km/h (7 mph) higher top speed
  • Has 2 hp/t better power-to-weight
  • Has 25 L more trunk volume

Pros

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

Cons

  • Highest combined fuel consumption
  • Heaviest

BMW 4 Series Coupe (F32) 418d

  • Has 70 Nm more
  • Is 160 kg lighter
  • Uses 3.6 L/100 km less fuel
  • Has 538 km (334 mi) more estimated range

Pros

  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Lowest power
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Gran Coupe (G26) 420i
BMW 4 Series Coupe (F32) 418d
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BMW 4 Series Gran Coupe (G26) 420i vs BMW 4 Series Coupe (F32) 418d - car comparison - FastVsFaster