Car comparison

BMW 6 Series (E24) · Facelift 1987 M 635CSivsPorsche 944 Cabrio 3.0 S2 CAT

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

Porsche 944 Cabrio

3.0 S2 CAT

211 hp2990 ccGasolineRWDManualNaturally aspiratedCoupe1989-1991

Comparison overview

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

Best choices

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
  • Highest torque
    330 Nm
    243 lb-ft
  • Best power-to-weight
    172 hp/t
    128 kW/t
    5.8 kg/hp
  • Best overall score
    54/100
  • Best performance score
    56/100
  • Best economy score
    75/100

Porsche 944 Cabrio 3.0 S2 CAT

  • Lightest
    1,465 kg
    3,230 lb
  • Lowest city consumption
    14.3 L/100 km
    16.4 mpg US
    19.8 mpg UK
  • Lowest highway consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Best practicality score
    50/100

Specification comparison

Specification comparison
ModelBMW6 Series (E24)Facelift 1987M 635CSiPorsche944 Cabrio3.0 S2 CAT
Power
260hp194kW
211hp157kW
Torque
330Nm243lb-ft
280Nm207lb-ft
Curb weight
1,515kg3,340lb
1,465kg3,230lb
Gross weight
1,865kg4,112lb
1,710kg3,770lb
Top speed
242 km/h
150 mph
240 km/h
149 mph
To 99% top speed
92.7s99% target: 240 km/h / 149 mph
Calculated
89.6s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
6.9s
7.1s
0-200 km/h
28.9s
Calculated
29.4s
Calculated
0-60 mph
6.5s
Calculated
6.7s
Calculated
Fuel consumption
11.9L/100 km19.8mpg US23.7mpg UK
-
Fuel consumption city
17.6L/100 km13.4mpg US16.1mpg UK
14.3L/100 km16.4mpg US19.8mpg UK
Fuel consumption highway
8.1L/100 km29mpg US34.9mpg UK
7.4L/100 km31.8mpg US38.2mpg UK
Quarter mile
14.9s
Calculated
15.1s
Calculated
Power-to-weight
172hp/t128kW/t78hp/1000 lb
Calculated
144hp/t107kW/t65hp/1000 lb
Calculated
Torque-to-weight
218Nm/t146lb-ft/ton
Calculated
191Nm/t128lb-ft/ton
Calculated
Estimated range
588km366mi
Calculated
-
Displacement
3,453cc211cu in
2,990cc182cu in
Length
4,815mm190in
4,230mm167in
Width
1,725mm68in
1,735mm68in
Height
1,355mm53in
1,275mm50in
Wheelbase
2,625mm103in
2,400mm94in
Front track
1,430mm56in
-
Rear track
1,464mm58in
-
Trunk volume
335L
-
Doors
2
2
Seats
4
4
Fuel tank
70L
80L

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 635CSiPorsche 944 Cabrio 3.0 S2 CATPowerTorque
  • BMW 6 Series (E24) Facelift 1987 M 635CSi: Power / Torque
  • Porsche 944 Cabrio 3.0 S2 CAT: 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
Porsche944 Cabrio3.0 S2 CAT5,800 rpm4,100 rpm6,050 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series (E24)Facelift 1987M 635CSiPorsche944 Cabrio3.0 S2 CAT
Acceleration checkpoints
0-60 mph
0-97 km/h
6.5 s
6.7 s
0-100 km/h
0-62 mph
6.9 s
7.1 s
0-200 km/h
0-124 mph
28.9 s
29.4 s
Top speed
242 km/h
150 mph
240 km/h
149 mph
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.4 s
6.5 s
1/8 mile
201 m
9.7 s
9.9 s
1000 ft
305 m
12.5 s
12.7 s
1/4 mile
402 m
14.9 s
15.1 s
Trap speed
1/4 mile
402 m
154 km/h
96 mph
153 km/h
95 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
Porsche944 Cabrio3.0 S2 CAT
211 hp
157 kW

BMW 6 Series (E24) Facelift 1987 M 635CSi has 49 hp more than Porsche 944 Cabrio 3.0 S2 CAT.

The biggest power difference is between Porsche 944 Cabrio 3.0 S2 CAT and BMW 6 Series (E24) Facelift 1987 M 635CSi: 49 hp (37 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
Porsche944 Cabrio3.0 S2 CAT
280 Nm
207 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
Porsche944 Cabrio3.0 S2 CAT
1,465 kg
3,230 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
Porsche944 Cabrio3.0 S2 CAT
240 km/h
149 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
Porsche944 Cabrio3.0 S2 CAT7.1 s

The biggest 0-100 km/h difference is between BMW 6 Series (E24) Facelift 1987 M 635CSi and Porsche 944 Cabrio 3.0 S2 CAT: 0.2 s.

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
Porsche944 Cabrio3.0 S2 CAT
144 hp/t
107 kW/t
6.9 kg/hp

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
Porsche944 Cabrio3.0 S2 CAT
211 hp
157 kW
7.1 s
240 km/h
149 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
Porsche944 Cabrio3.0 S2 CAT
Power
211 hp
157 kW
0-100 km/h7.1 s
Top speed
240 km/h
149 mph
Doors/seats
2 doors
4 seats
Trunk-
Length
4,230 mm
166.5 in
Height
1,275 mm
50.2 in

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series (E24)Facelift 1987M 635CSiPorsche944 Cabrio3.0 S2 CAT
Power
260 hp
194 kW
211 hp
157 kW
Torque
330 Nm
243 lb-ft
280 Nm
207 lb-ft
Acceleration
6.9 s
7.1 s
Top speed
242 km/h
150 mph
240 km/h
149 mph
Lightness
1,515 kg
3,340 lb
1,465 kg
3,230 lb
Fuel consumption
11.9 L/100 km
19.8 mpg US
23.7 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
2 doors
4 seats
Trunk-
Length
4,230 mm
166.5 in
Height
1,275 mm
50.2 in
Range score
588 km
366 mi
-
Trunk score
335 L
11.8 cu ft
-
Power-to-weight score
172 hp/t
128 kW/t
5.8 kg/hp
144 hp/t
107 kW/t
6.9 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
VehicleBMW 6 Series (E24) Facelift 1987 M 635CSi
Consumption11.9 L/100 km19.8 mpg US23.7 mpg UK
Cost / 100 km20.83 LC100 km
Cost / 100 mi33.51 LC100 mi
Annual fuel used1,785 L472 US gal393 UK gal
Annual fuel cost3,124 LC/year

Head-to-head comparisons

BMW 6 Series (E24) Facelift 1987 M 635CSi

  • Has 49 hp more
  • Has 50 Nm more
  • Is 0.2 s quicker from 0-100 km/h
  • Has 2 km/h (1 mph) higher top speed
  • Has 28 hp/t better power-to-weight

Pros

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

Cons

  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series (E24) M 635CSi
Porsche 944 Cabrio 3.0 S2 CAT
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2 vehicles selected

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BMW 6 Series (E24) · Facelift 1987 M 635CSi vs Porsche 944 Cabrio 3.0 S2 CAT - car comparison - FastVsFaster