Car comparison

BMW 6 Series (E24) · Facelift 1987 M 635CSivsBMW 6 Series Gran Turismo (G32) 620d

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

New comparison

BMW 6 Series (E24) · Facelift 1987

M 635CSi

260 hp3453 ccGasolineRWDManualNaturally aspiratedCoupe1987-1989
VS

BMW 6 Series Gran Turismo (G32)

620d

190 hp1995 ccDieselRWDAutomaticTurbocharged2018-2020

Comparison overview

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

Best choices

BMW 6 Series Gran Turismo (G32) 620d

  • Highest torque
    400 Nm
    295 lb-ft
  • Lowest combined fuel consumption
    4.9 L/100 km
    48.0 mpg US
    57.6 mpg UK
  • Lowest city consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Lowest highway consumption
    4.6 L/100 km
    51.1 mpg US
    61.4 mpg UK
  • Best estimated range
    1,347 km
    837 mi
  • Largest trunk
    610 L
  • Best overall score
    60/100
  • Best economy score
    94/100
  • Best practicality score
    79/100

BMW 6 Series (E24) Facelift 1987 M 635CSi

  • Quickest 0-100 km/h
    6.9 s
  • Fastest top speed
    242 km/h
    150 mph
  • Most powerful
    260 hp
    194 kW
  • Lightest
    1,515 kg
    3,340 lb
  • Best power-to-weight
    172 hp/t
    128 kW/t
    5.8 kg/hp
  • Best performance score
    56/100

Specification comparison

Specification comparison
ModelBMW6 Series (E24)Facelift 1987M 635CSiBMW6 Series Gran Turismo (G32)620d
Power
260hp194kW
190hp142kW
Torque
330Nm243lb-ft
400Nm295lb-ft
Curb weight
1,515kg3,340lb
1,765kg3,891lb
Gross weight
1,865kg4,112lb
2,440kg5,379lb
Top speed
242 km/h
150 mph
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 mph
Calculated
To 99% top speed
93.4s99% target: 240 km/h / 149 mph
Calculated
97.1s99% target: 228 km/h / 141 mph
Calculated
0-100 km/h
6.9s
7.9s
0-200 km/h
29.0s
Calculated
36.5s
Calculated
0-60 mph
6.5s
Calculated
7.5s
Calculated
Fuel consumption
11.9L/100 km19.8mpg US23.7mpg UK
4.9L/100 km48mpg US57.6mpg UK
Fuel consumption city
17.6L/100 km13.4mpg US16.1mpg UK
5.4L/100 km43.6mpg US52.3mpg UK
Fuel consumption highway
8.1L/100 km29mpg US34.9mpg UK
4.6L/100 km51.1mpg US61.4mpg UK
Quarter mile
14.9s
Calculated
15.7s
Calculated
Power-to-weight
172hp/t128kW/t78hp/1000 lb
Calculated
108hp/t80kW/t49hp/1000 lb
Calculated
Torque-to-weight
218Nm/t146lb-ft/ton
Calculated
227Nm/t152lb-ft/ton
Calculated
Estimated range
588km366mi
Calculated
1,347km837mi
Calculated
Displacement
3,453cc211cu in
1,995cc122cu in
Length
4,815mm190in
5,091mm200in
Width
1,725mm68in
1,902mm75in
Height
1,355mm53in
1,540mm61in
Wheelbase
2,625mm103in
3,070mm121in
Front track
1,430mm56in
1,615mm64in
Rear track
1,464mm58in
1,647mm65in
Ground clearance-
138mm5in
Trunk volume
335L
610L
Max trunk volume-
1,800L
Doors
2
5
Seats
4
5
Fuel tank
70L
66L
CO2 emissions-
129g/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 6 Series (E24) Facelift 1987 M 635CSiBMW 6 Series Gran Turismo (G32) 620dPowerTorque
  • BMW 6 Series (E24) Facelift 1987 M 635CSi: Power / Torque
  • BMW 6 Series Gran Turismo (G32) 620d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series (E24)Facelift 1987M 635CSi6,500 rpm4,500 rpm6,750 rpm
BMW6 Series Gran Turismo (G32)620d4,000 rpm1,750-2,500 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series (E24)Facelift 1987M 635CSiBMW6 Series Gran Turismo (G32)620d
Acceleration checkpoints
0-60 mph
0-97 km/h
6.5 s
7.5 s
0-100 km/h
0-62 mph
6.9 s
7.9 s
0-200 km/h
0-124 mph
29.0 s
36.5 s
Top speed
242 km/h
150 mph
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 mph
Likely limited
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.4 s
6.8 s
1/8 mile
201 m
9.7 s
10.2 s
1000 ft
305 m
12.5 s
13.2 s
1/4 mile
402 m
14.9 s
15.7 s
Trap speed
1/4 mile
402 m
154 km/h
96 mph
146 km/h
91 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi
260 hp
194 kW
BMW6 Series Gran Turismo (G32)620d
190 hp
142 kW

BMW 6 Series (E24) Facelift 1987 M 635CSi has 70 hp more than BMW 6 Series Gran Turismo (G32) 620d.

The biggest power difference is between BMW 6 Series Gran Turismo (G32) 620d and BMW 6 Series (E24) Facelift 1987 M 635CSi: 70 hp (52 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi
330 Nm
243 lb-ft
BMW6 Series Gran Turismo (G32)620d
400 Nm
295 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi
1,515 kg
3,340 lb
BMW6 Series Gran Turismo (G32)620d
1,765 kg
3,891 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi
242 km/h
150 mph
BMW6 Series Gran Turismo (G32)620d
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi6.9 s
BMW6 Series Gran Turismo (G32)620d7.9 s

The biggest 0-100 km/h difference is between BMW 6 Series (E24) Facelift 1987 M 635CSi and BMW 6 Series Gran Turismo (G32) 620d: 1.0 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
BMW6 Series Gran Turismo (G32)620d
4.9 L/100 km
48.0 mpg US
57.6 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Gran Turismo (G32) 620d and BMW 6 Series (E24) Facelift 1987 M 635CSi: 7.0 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
BMW6 Series (E24)Facelift 1987M 635CSi
172 hp/t
128 kW/t
5.8 kg/hp
BMW6 Series Gran Turismo (G32)620d
108 hp/t
80 kW/t
9.3 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series (E24)Facelift 1987M 635CSi
588 km
366 mi
BMW6 Series Gran Turismo (G32)620d
1,347 km
837 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series (E24)Facelift 1987M 635CSi
260 hp
194 kW
6.9 s
242 km/h
150 mph
BMW6 Series Gran Turismo (G32)620d
190 hp
142 kW
7.9 s
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 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
BMW6 Series (E24)Facelift 1987M 635CSi
Power
260 hp
194 kW
0-100 km/h6.9 s
Top speed
242 km/h
150 mph
Doors/seats
2 doors
4 seats
Trunk
335 L
11.8 cu ft
Length
4,815 mm
189.6 in
Height
1,355 mm
53.3 in
BMW6 Series Gran Turismo (G32)620d
Power
190 hp
142 kW
0-100 km/h7.9 s
Top speed
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 mph
Doors/seats
5 doors
5 seats
Trunk
610 L
21.5 cu ft
Length
5,091 mm
200.4 in
Height
1,540 mm
60.6 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
BMW6 Series (E24)Facelift 1987M 635CSi
Power
260 hp
194 kW
0-100 km/h6.9 s
Top speed
242 km/h
150 mph
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
BMW6 Series Gran Turismo (G32)620d
Power
190 hp
142 kW
0-100 km/h7.9 s
Top speed
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 mph
4.9 L/100 km
48.0 mpg US
57.6 mpg UK

BMW 6 Series Gran Turismo (G32) 620d 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
BMW6 Series (E24)Facelift 1987M 635CSi
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
6.9 s
BMW6 Series Gran Turismo (G32)620d
4.9 L/100 km
48.0 mpg US
57.6 mpg UK
7.9 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
BMW6 Series (E24)Facelift 1987M 635CSi
172 hp/t
128 kW/t
5.8 kg/hp
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
BMW6 Series Gran Turismo (G32)620d
108 hp/t
80 kW/t
9.3 kg/hp
4.9 L/100 km
48.0 mpg US
57.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series (E24)Facelift 1987M 635CSiBMW6 Series Gran Turismo (G32)620d
Power
260 hp
194 kW
190 hp
142 kW
Torque
330 Nm
243 lb-ft
400 Nm
295 lb-ft
Acceleration
6.9 s
7.9 s
Top speed
242 km/h
150 mph
Unrestricted
230 km/h143 mph
Restricted
220 km/h137 mph
Lightness
1,515 kg
3,340 lb
1,765 kg
3,891 lb
Fuel consumption
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
4.9 L/100 km
48.0 mpg US
57.6 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
335 L
11.8 cu ft
Length
4,815 mm
189.6 in
Height
1,355 mm
53.3 in
Doors/seats
5 doors
5 seats
Trunk
610 L
21.5 cu ft
Length
5,091 mm
200.4 in
Height
1,540 mm
60.6 in
Range score
588 km
366 mi
1,347 km
837 mi
CO2 score
-
129 g/km
Trunk score
335 L
11.8 cu ft
610 L
21.5 cu ft
Power-to-weight score
172 hp/t
128 kW/t
5.8 kg/hp
108 hp/t
80 kW/t
9.3 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 6 Series (E24) Facelift 1987 M 635CSiBMW 6 Series Gran Turismo (G32) 620d
Consumption11.9 L/100 km19.8 mpg US23.7 mpg UK4.9 L/100 km48 mpg US57.6 mpg UK
Cost / 100 km20.83 LC100 km8.58 LC100 km
Cost / 100 mi33.51 LC100 mi13.80 LC100 mi
Annual fuel used1,785 L472 US gal393 UK gal735 L194 US gal162 UK gal
Annual fuel cost3,124 LC/year1,286 LC/year

Head-to-head comparisons

BMW 6 Series (E24) Facelift 1987 M 635CSi

  • Has 70 hp more
  • Is 250 kg lighter
  • Is 1.0 s quicker from 0-100 km/h
  • Has 12 km/h (7 mph) higher top speed
  • Has 64 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Smallest trunk

BMW 6 Series Gran Turismo (G32) 620d

  • Has 70 Nm more
  • Uses 7.0 L/100 km less fuel
  • Has 759 km (471 mi) more estimated range
  • Has 275 L more trunk volume

Pros

  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series (E24) M 635CSi
BMW 6 Series Gran Turismo (G32) 620d
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