Car comparison

Porsche 911 (997) · Facelift 2008 GT3 RS 3.8vsPorsche Cayman (981C) GT4 3.8

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

New comparison

Porsche 911 (997) · Facelift 2008

GT3 RS 3.8

450 hp3797 ccGasolineRWDManualNaturally aspiratedCoupe2009-2011
VS

Porsche Cayman (981C)

GT4 3.8

385 hp3800 ccGasolineRWDManualNaturally aspiratedCoupe2015-2016

Comparison overview

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

Best choices

Porsche Cayman (981C) GT4 3.8

  • Lightest
    1,340 kg
    2,954 lb
  • Lowest combined fuel consumption
    10.3 L/100 km
    22.8 mpg US
    27.4 mpg UK
  • Lowest city consumption
    14.8 L/100 km
    15.9 mpg US
    19.1 mpg UK
  • Lowest highway consumption
    7.8 L/100 km
    30.2 mpg US
    36.2 mpg UK
  • Lowest CO2 emissions
    238 g/km
  • Best estimated range
    524 km
    326 mi
  • Largest trunk
    425 L
  • Best economy score
    79/100
  • Best practicality score
    42/100

Porsche 911 (997) Facelift 2008 GT3 RS 3.8

  • Quickest 0-100 km/h
    4.0 s
  • Fastest top speed
    320 km/h
    199 mph Unrestricted
    310 km/h
    193 mph Restricted
  • Most powerful
    450 hp
    336 kW
  • Highest torque
    430 Nm
    317 lb-ft
  • Best power-to-weight
    328 hp/t
    245 kW/t
    3.0 kg/hp
  • Best overall score
    70/100
  • Best performance score
    84/100

Specification comparison

Specification comparison
ModelPorsche911 (997)Facelift 2008GT3 RS 3.8PorscheCayman (981C)GT4 3.8
Power
450hp336kW
385hp287kW
Torque
430Nm317lb-ft
420Nm310lb-ft
Curb weight
1,370kg3,020lb
1,340kg2,954lb
Gross weight
1,680kg3,704lb
1,640kg3,616lb
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Calculated
295 km/h
183 mph
To 99% top speed
58.1s99% target: 317 km/h / 197 mph
Calculated
59.7s99% target: 292 km/h / 181 mph
Calculated
0-100 km/h
4.0s
4.4s
0-200 km/h
11.2s
Calculated
13.1s
Calculated
0-60 mph
3.8s
Calculated
4.2s
Calculated
Fuel consumption
13.2L/100 km17.8mpg US21.4mpg UK
10.3L/100 km22.8mpg US27.4mpg UK
Fuel consumption city
19.4L/100 km12.1mpg US14.6mpg UK
14.8L/100 km15.9mpg US19.1mpg UK
Fuel consumption highway
9.6L/100 km24.5mpg US29.4mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
11.7s
Calculated
12.3s
Calculated
Power-to-weight
328hp/t245kW/t149hp/1000 lb
Calculated
287hp/t214kW/t130hp/1000 lb
Calculated
Torque-to-weight
314Nm/t210lb-ft/ton
Calculated
313Nm/t210lb-ft/ton
Calculated
Estimated range
508km315mi
Calculated
524km326mi
Calculated
Displacement
3,797cc232cu in
3,800cc232cu in
Length
4,460mm176in
4,438mm175in
Width
1,808mm71in
1,817mm72in
Height
1,280mm50in
1,266mm50in
Wheelbase
2,355mm93in
2,484mm98in
Trunk volume-
425L
Max trunk volume
105L
-
Doors
2
2
Seats
2
2
Fuel tank
67L
54L
CO2 emissions
314g/km
238g/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 911 (997) Facelift 2008 GT3 RS 3.8Porsche Cayman (981C) GT4 3.8PowerTorque
  • Porsche 911 (997) Facelift 2008 GT3 RS 3.8: Power / Torque
  • Porsche Cayman (981C) GT4 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (997)Facelift 2008GT3 RS 3.87,900 rpm6,750 rpm8,150 rpm
PorscheCayman (981C)GT4 3.87,400 rpm4,750-6,000 rpm7,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (997)Facelift 2008GT3 RS 3.8PorscheCayman (981C)GT4 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.8 s
4.2 s
0-100 km/h
0-62 mph
4.0 s
4.4 s
0-200 km/h
0-124 mph
11.2 s
13.1 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Likely limited
295 km/h
183 mph
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.3 s
5.5 s
1/8 mile
201 m
7.8 s
8.1 s
1000 ft
305 m
10.0 s
10.4 s
1/4 mile
402 m
11.7 s
12.3 s
Trap speed
1/4 mile
402 m
205 km/h
128 mph
194 km/h
120 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
450 hp
336 kW
PorscheCayman (981C)GT4 3.8
385 hp
287 kW

Porsche 911 (997) Facelift 2008 GT3 RS 3.8 has 65 hp more than Porsche Cayman (981C) GT4 3.8.

The biggest power difference is between Porsche Cayman (981C) GT4 3.8 and Porsche 911 (997) Facelift 2008 GT3 RS 3.8: 65 hp (48 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
430 Nm
317 lb-ft
PorscheCayman (981C)GT4 3.8
420 Nm
310 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
1,370 kg
3,020 lb
PorscheCayman (981C)GT4 3.8
1,340 kg
2,954 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
PorscheCayman (981C)GT4 3.8
295 km/h
183 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.84.0 s
PorscheCayman (981C)GT4 3.84.4 s

The biggest 0-100 km/h difference is between Porsche 911 (997) Facelift 2008 GT3 RS 3.8 and Porsche Cayman (981C) GT4 3.8: 0.4 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
PorscheCayman (981C)GT4 3.8
10.3 L/100 km
22.8 mpg US
27.4 mpg UK

The biggest fuel consumption difference is between Porsche Cayman (981C) GT4 3.8 and Porsche 911 (997) Facelift 2008 GT3 RS 3.8: 2.9 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
Porsche911 (997)Facelift 2008GT3 RS 3.8
328 hp/t
245 kW/t
3.0 kg/hp
PorscheCayman (981C)GT4 3.8
287 hp/t
214 kW/t
3.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
508 km
315 mi
PorscheCayman (981C)GT4 3.8
524 km
326 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (997)Facelift 2008GT3 RS 3.8
450 hp
336 kW
4.0 s
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
PorscheCayman (981C)GT4 3.8
385 hp
287 kW
4.4 s
295 km/h
183 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
Porsche911 (997)Facelift 2008GT3 RS 3.8
Power
450 hp
336 kW
0-100 km/h4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Doors/seats
2 doors
2 seats
Trunk
105 L
3.7 cu ft
Length
4,460 mm
175.6 in
Height
1,280 mm
50.4 in
PorscheCayman (981C)GT4 3.8
Power
385 hp
287 kW
0-100 km/h4.4 s
Top speed
295 km/h
183 mph
Doors/seats
2 doors
2 seats
Trunk
425 L
15.0 cu ft
Length
4,438 mm
174.7 in
Height
1,266 mm
49.8 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
Porsche911 (997)Facelift 2008GT3 RS 3.8
Power
450 hp
336 kW
0-100 km/h4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
PorscheCayman (981C)GT4 3.8
Power
385 hp
287 kW
0-100 km/h4.4 s
Top speed
295 km/h
183 mph
10.3 L/100 km
22.8 mpg US
27.4 mpg UK

Porsche Cayman (981C) GT4 3.8 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
Porsche911 (997)Facelift 2008GT3 RS 3.8
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
4.0 s
PorscheCayman (981C)GT4 3.8
10.3 L/100 km
22.8 mpg US
27.4 mpg UK
4.4 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
Porsche911 (997)Facelift 2008GT3 RS 3.8
328 hp/t
245 kW/t
3.0 kg/hp
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
PorscheCayman (981C)GT4 3.8
287 hp/t
214 kW/t
3.5 kg/hp
10.3 L/100 km
22.8 mpg US
27.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (997)Facelift 2008GT3 RS 3.8PorscheCayman (981C)GT4 3.8
Power
450 hp
336 kW
385 hp
287 kW
Torque
430 Nm
317 lb-ft
420 Nm
310 lb-ft
Acceleration
4.0 s
4.4 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
295 km/h
183 mph
Lightness
1,370 kg
3,020 lb
1,340 kg
2,954 lb
Fuel consumption
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
10.3 L/100 km
22.8 mpg US
27.4 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
105 L
3.7 cu ft
Length
4,460 mm
175.6 in
Height
1,280 mm
50.4 in
Doors/seats
2 doors
2 seats
Trunk
425 L
15.0 cu ft
Length
4,438 mm
174.7 in
Height
1,266 mm
49.8 in
Range score
508 km
315 mi
524 km
326 mi
CO2 score
314 g/km
238 g/km
Trunk score
105 L
3.7 cu ft
425 L
15.0 cu ft
Power-to-weight score
328 hp/t
245 kW/t
3.0 kg/hp
287 hp/t
214 kW/t
3.5 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 911 (997) Facelift 2008 GT3 RS 3.8Porsche Cayman (981C) GT4 3.8
Consumption13.2 L/100 km17.8 mpg US21.4 mpg UK10.3 L/100 km22.8 mpg US27.4 mpg UK
Cost / 100 km23.10 LC100 km18.03 LC100 km
Cost / 100 mi37.18 LC100 mi29.01 LC100 mi
Annual fuel used1,980 L523 US gal436 UK gal1,545 L408 US gal340 UK gal
Annual fuel cost3,465 LC/year2,704 LC/year

Head-to-head comparisons

Porsche 911 (997) Facelift 2008 GT3 RS 3.8

  • Has 65 hp more
  • Has 10 Nm more
  • Is 0.4 s quicker from 0-100 km/h
  • Has 25 km/h (16 mph) higher top speed
  • Has 41 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

  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk
  • Highest CO2 emissions

Porsche Cayman (981C) GT4 3.8

  • Is 30 kg lighter
  • Uses 2.9 L/100 km less fuel
  • Has 17 km (10 mi) more estimated range
  • Has 320 L more trunk volume
  • Emits 76 g/km less CO2

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (997) GT3 RS 3.8
Porsche Cayman (981C) GT4 3.8
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