Car comparison

Porsche Cayman (987C) S 3.4vsBMW 6 Series (E63) · Facelift 2007 635d

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

New comparison

Porsche Cayman (987C)

S 3.4

295 hp3386 ccGasolineRWDAutomaticNaturally aspiratedCoupe2005-2009
VS

BMW 6 Series (E63) · Facelift 2007

635d

286 hp2993 ccDieselRWDAutomaticTurbochargedCoupe2007-2010

Comparison overview

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

Best choices

BMW 6 Series (E63) Facelift 2007 635d

  • Highest torque
    580 Nm
    428 lb-ft
  • Lowest combined fuel consumption
    6.9 L/100 km
    34.1 mpg US
    40.9 mpg UK
  • Lowest city consumption
    9.2 L/100 km
    25.6 mpg US
    30.7 mpg UK
  • Lowest highway consumption
    5.6 L/100 km
    42.0 mpg US
    50.4 mpg UK
  • Lowest CO2 emissions
    183 g/km
  • Best estimated range
    1,014 km
    630 mi
  • Largest trunk
    450 L
  • Best overall score
    62/100
  • Best performance score
    66/100
  • Best economy score
    88/100
  • Best practicality score
    53/100

Porsche Cayman (987C) S 3.4

  • Quickest 0-100 km/h
    6.1 s
  • Fastest top speed
    267 km/h
    166 mph
  • Most powerful
    295 hp
    220 kW
  • Lightest
    1,390 kg
    3,064 lb
  • Best power-to-weight
    212 hp/t
    158 kW/t
    4.7 kg/hp

Specification comparison

Specification comparison
ModelPorscheCayman (987C)S 3.4BMW6 Series (E63)Facelift 2007635d
Power
295hp220kW
286hp213kW
Torque
340Nm251lb-ft
580Nm428lb-ft
Curb weight
1,390kg3,064lb
1,650kg3,638lb
Gross weight
1,670kg3,682lb
2,100kg4,630lb
Top speed
267 km/h
166 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
88.3s99% target: 264 km/h / 164 mph
Calculated
87.8s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
6.1s
6.3s
0-200 km/h
21.6s
23.0s
Calculated
0-60 mph
5.8s
Calculated
6.0s
Calculated
Fuel consumption
11L/100 km21.4mpg US25.7mpg UK
6.9L/100 km34.1mpg US40.9mpg UK
Fuel consumption city
16.3L/100 km14.4mpg US17.3mpg UK
9.2L/100 km25.6mpg US30.7mpg UK
Fuel consumption highway
7.9L/100 km29.8mpg US35.8mpg UK
5.6L/100 km42mpg US50.4mpg UK
Quarter mile
14.2s
Calculated
14.3s
Calculated
Power-to-weight
212hp/t158kW/t96hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
245Nm/t164lb-ft/ton
Calculated
352Nm/t235lb-ft/ton
Calculated
Estimated range
582km362mi
Calculated
1,014km630mi
Calculated
Displacement
3,386cc207cu in
2,993cc183cu in
Length
4,341mm171in
4,820mm190in
Width
1,801mm71in
1,855mm73in
Height
1,305mm51in
1,374mm54in
Wheelbase
2,415mm95in
2,780mm109in
Front track
1,486mm59in
1,558mm61in
Rear track
1,528mm60in
1,596mm63in
Ground clearance
121mm5in
-
Trunk volume
260L
450L
Doors
2
2
Seats
2
4
Fuel tank
64L
70L
CO2 emissions
262g/km
183g/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.

Porsche Cayman (987C) S 3.4BMW 6 Series (E63) Facelift 2007 635dPowerTorque
  • Porsche Cayman (987C) S 3.4: Power / Torque
  • BMW 6 Series (E63) Facelift 2007 635d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
PorscheCayman (987C)S 3.46,250 rpm4,400-6,000 rpm7,300 rpm
BMW6 Series (E63)Facelift 2007635d4,400 rpm1,750-2,250 rpm4,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorscheCayman (987C)S 3.4BMW6 Series (E63)Facelift 2007635d
Acceleration checkpoints
0-60 mph
0-97 km/h
5.8 s
6.0 s
0-100 km/h
0-62 mph
6.1 s
6.3 s
0-200 km/h
0-124 mph
21.6 s
23.0 s
Top speed
267 km/h
166 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.4 s
2.4 s
330 ft
101 m
6.2 s
6.3 s
1/8 mile
201 m
9.3 s
9.4 s
1000 ft
305 m
11.9 s
12.1 s
1/4 mile
402 m
14.2 s
14.3 s
Trap speed
1/4 mile
402 m
165 km/h
103 mph
162 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
PorscheCayman (987C)S 3.4
295 hp
220 kW
BMW6 Series (E63)Facelift 2007635d
286 hp
213 kW

Porsche Cayman (987C) S 3.4 has 9 hp more than BMW 6 Series (E63) Facelift 2007 635d.

The biggest power difference is between BMW 6 Series (E63) Facelift 2007 635d and Porsche Cayman (987C) S 3.4: 9 hp (7 kW).

Torque comparison

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

Chart data table
VehicleValue
PorscheCayman (987C)S 3.4
340 Nm
251 lb-ft
BMW6 Series (E63)Facelift 2007635d
580 Nm
428 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
PorscheCayman (987C)S 3.4
1,390 kg
3,064 lb
BMW6 Series (E63)Facelift 2007635d
1,650 kg
3,638 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
PorscheCayman (987C)S 3.4
267 km/h
166 mph
BMW6 Series (E63)Facelift 2007635d
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
PorscheCayman (987C)S 3.46.1 s
BMW6 Series (E63)Facelift 2007635d6.3 s

The biggest 0-100 km/h difference is between Porsche Cayman (987C) S 3.4 and BMW 6 Series (E63) Facelift 2007 635d: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
PorscheCayman (987C)S 3.4
11.0 L/100 km
21.4 mpg US
25.7 mpg UK
BMW6 Series (E63)Facelift 2007635d
6.9 L/100 km
34.1 mpg US
40.9 mpg UK

The biggest fuel consumption difference is between BMW 6 Series (E63) Facelift 2007 635d and Porsche Cayman (987C) S 3.4: 4.1 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
PorscheCayman (987C)S 3.4
212 hp/t
158 kW/t
4.7 kg/hp
BMW6 Series (E63)Facelift 2007635d
173 hp/t
129 kW/t
5.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
PorscheCayman (987C)S 3.4
582 km
362 mi
BMW6 Series (E63)Facelift 2007635d
1,014 km
630 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
PorscheCayman (987C)S 3.4
295 hp
220 kW
6.1 s
267 km/h
166 mph
BMW6 Series (E63)Facelift 2007635d
286 hp
213 kW
6.3 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
PorscheCayman (987C)S 3.4
Power
295 hp
220 kW
0-100 km/h6.1 s
Top speed
267 km/h
166 mph
Doors/seats
2 doors
2 seats
Trunk
260 L
9.2 cu ft
Length
4,341 mm
170.9 in
Height
1,305 mm
51.4 in
BMW6 Series (E63)Facelift 2007635d
Power
286 hp
213 kW
0-100 km/h6.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 cu ft
Length
4,820 mm
189.8 in
Height
1,374 mm
54.1 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
PorscheCayman (987C)S 3.4
Power
295 hp
220 kW
0-100 km/h6.1 s
Top speed
267 km/h
166 mph
11.0 L/100 km
21.4 mpg US
25.7 mpg UK
BMW6 Series (E63)Facelift 2007635d
Power
286 hp
213 kW
0-100 km/h6.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.9 L/100 km
34.1 mpg US
40.9 mpg UK

BMW 6 Series (E63) Facelift 2007 635d 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
PorscheCayman (987C)S 3.4
11.0 L/100 km
21.4 mpg US
25.7 mpg UK
6.1 s
BMW6 Series (E63)Facelift 2007635d
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
6.3 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
PorscheCayman (987C)S 3.4
212 hp/t
158 kW/t
4.7 kg/hp
11.0 L/100 km
21.4 mpg US
25.7 mpg UK
BMW6 Series (E63)Facelift 2007635d
173 hp/t
129 kW/t
5.8 kg/hp
6.9 L/100 km
34.1 mpg US
40.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorscheCayman (987C)S 3.4BMW6 Series (E63)Facelift 2007635d
Power
295 hp
220 kW
286 hp
213 kW
Torque
340 Nm
251 lb-ft
580 Nm
428 lb-ft
Acceleration
6.1 s
6.3 s
Top speed
267 km/h
166 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,390 kg
3,064 lb
1,650 kg
3,638 lb
Fuel consumption
11.0 L/100 km
21.4 mpg US
25.7 mpg UK
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
260 L
9.2 cu ft
Length
4,341 mm
170.9 in
Height
1,305 mm
51.4 in
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 cu ft
Length
4,820 mm
189.8 in
Height
1,374 mm
54.1 in
Range score
582 km
362 mi
1,014 km
630 mi
CO2 score
262 g/km
183 g/km
Trunk score
260 L
9.2 cu ft
450 L
15.9 cu ft
Power-to-weight score
212 hp/t
158 kW/t
4.7 kg/hp
173 hp/t
129 kW/t
5.8 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
VehiclePorsche Cayman (987C) S 3.4BMW 6 Series (E63) Facelift 2007 635d
Consumption11 L/100 km21.4 mpg US25.7 mpg UK6.9 L/100 km34.1 mpg US40.9 mpg UK
Cost / 100 km19.25 LC100 km12.08 LC100 km
Cost / 100 mi30.98 LC100 mi19.43 LC100 mi
Annual fuel used1,650 L436 US gal363 UK gal1,035 L273 US gal228 UK gal
Annual fuel cost2,888 LC/year1,811 LC/year

Head-to-head comparisons

Porsche Cayman (987C) S 3.4

  • Has 9 hp more
  • Is 260 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 7 km/h (4 mph) higher top speed
  • Has 39 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
  • Highest CO2 emissions

BMW 6 Series (E63) Facelift 2007 635d

  • Has 240 Nm more
  • Uses 4.1 L/100 km less fuel
  • Has 433 km (269 mi) more estimated range
  • Has 190 L more trunk volume
  • Emits 79 g/km less CO2

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
Porsche Cayman (987C) S 3.4
BMW 6 Series (E63) 635d
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