Car comparison

Porsche 911 Speedster 3.6vsAlfa Romeo RZ 3.0 i V6

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

New comparison

Porsche 911 Speedster

3.6

250 hp3600 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible1989-1989
VS

Alfa Romeo RZ

3.0 i V6

210 hp2959 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible1988-1993

Comparison overview

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

Best choices

Porsche 911 Speedster 3.6

  • Quickest 0-100 km/h
    5.7 s
  • Fastest top speed
    270 km/h
    168 mph Unrestricted
    260 km/h
    162 mph Restricted
  • Most powerful
    250 hp
    186 kW
  • Highest torque
    310 Nm
    229 lb-ft
  • Lightest
    1,350 kg
    2,976 lb
  • Best power-to-weight
    185 hp/t
    138 kW/t
    5.4 kg/hp
  • Best overall score
    54/100
  • Best performance score
    63/100
  • Best practicality score
    35/100

Alfa Romeo RZ 3.0 i V6

  • Lowest city consumption
    13.2 L/100 km
    17.8 mpg US
    21.4 mpg UK
  • Lowest highway consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Best economy score
    82/100

Specification comparison

Specification comparison
ModelPorsche911 Speedster3.6Alfa RomeoRZ3.0 i V6
Power
250hp186kW
210hp157kW
Torque
310Nm229lb-ft
245Nm181lb-ft
Curb weight
1,350kg2,976lb
1,380kg3,042lb
Gross weight
1,600kg3,527lb
1,550kg3,417lb
Top speed
Unrestricted
270 km/h168 mph
Restricted
260 km/h162 mph
Calculated
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Calculated
To 99% top speed
75.6s99% target: 267 km/h / 166 mph
Calculated
95.6s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
5.7s
7.5s
0-200 km/h
19.0s
Calculated
31.2s
Calculated
0-60 mph
5.4s
Calculated
7.1s
Calculated
Fuel consumption-
9.3L/100 km25.3mpg US30.4mpg UK
Fuel consumption city
17.1L/100 km13.8mpg US16.5mpg UK
13.2L/100 km17.8mpg US21.4mpg UK
Fuel consumption highway
7.8L/100 km30.2mpg US36.2mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Quarter mile
13.7s
Calculated
15.4s
Calculated
Power-to-weight
185hp/t138kW/t84hp/1000 lb
Calculated
152hp/t113kW/t69hp/1000 lb
Calculated
Torque-to-weight
230Nm/t154lb-ft/ton
Calculated
178Nm/t119lb-ft/ton
Calculated
Estimated range-
753km468mi
Calculated
Displacement
3,600cc220cu in
2,959cc181cu in
Length
4,250mm167in
4,060mm160in
Width
1,652mm65in
1,730mm68in
Height
1,280mm50in
1,300mm51in
Wheelbase
2,272mm89in
2,510mm99in
Front track
1,374mm54in
1,465mm58in
Rear track
1,374mm54in
1,425mm56in
Ground clearance
115mm5in
-
Trunk volume-
120L
Max trunk volume-
390L
Doors
2
2
Seats
2
2
Fuel tank
77L
70L

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 Speedster 3.6Alfa Romeo RZ 3.0 i V6PowerTorque
  • Porsche 911 Speedster 3.6: Power / Torque
  • Alfa Romeo RZ 3.0 i V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Speedster3.66,100 rpm4,800 rpm6,350 rpm
Alfa RomeoRZ3.0 i V66,200 rpm4,500 rpm6,450 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Speedster3.6Alfa RomeoRZ3.0 i V6
Acceleration checkpoints
0-60 mph
0-97 km/h
5.4 s
7.1 s
0-100 km/h
0-62 mph
5.7 s
7.5 s
0-200 km/h
0-124 mph
19.0 s
31.2 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
260 km/h162 mph
Likely limited
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Likely limited
Drag race simulation
60 ft
18 m
2.3 s
2.5 s
330 ft
101 m
6.1 s
6.7 s
1/8 mile
201 m
9.1 s
10.1 s
1000 ft
305 m
11.6 s
13.0 s
1/4 mile
402 m
13.7 s
15.4 s
Trap speed
1/4 mile
402 m
172 km/h
107 mph
151 km/h
94 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Speedster3.6
250 hp
186 kW
Alfa RomeoRZ3.0 i V6
210 hp
157 kW

Porsche 911 Speedster 3.6 has 40 hp more than Alfa Romeo RZ 3.0 i V6.

The biggest power difference is between Alfa Romeo RZ 3.0 i V6 and Porsche 911 Speedster 3.6: 40 hp (30 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 Speedster3.6
310 Nm
229 lb-ft
Alfa RomeoRZ3.0 i V6
245 Nm
181 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 Speedster3.6
1,350 kg
2,976 lb
Alfa RomeoRZ3.0 i V6
1,380 kg
3,042 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 Speedster3.6
Unrestricted
270 km/h168 mph
Restricted
260 km/h162 mph
Alfa RomeoRZ3.0 i V6
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Porsche911 Speedster3.65.7 s
Alfa RomeoRZ3.0 i V67.5 s

The biggest 0-100 km/h difference is between Porsche 911 Speedster 3.6 and Alfa Romeo RZ 3.0 i V6: 1.8 s.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
Porsche911 Speedster3.6
185 hp/t
138 kW/t
5.4 kg/hp
Alfa RomeoRZ3.0 i V6
152 hp/t
113 kW/t
6.6 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Speedster3.6
250 hp
186 kW
5.7 s
Unrestricted
270 km/h168 mph
Restricted
260 km/h162 mph
Alfa RomeoRZ3.0 i V6
210 hp
157 kW
7.5 s
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 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 Speedster3.6
Power
250 hp
186 kW
0-100 km/h5.7 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
260 km/h162 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,250 mm
167.3 in
Height
1,280 mm
50.4 in
Alfa RomeoRZ3.0 i V6
Power
210 hp
157 kW
0-100 km/h7.5 s
Top speed
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,060 mm
159.8 in
Height
1,300 mm
51.2 in

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Speedster3.6Alfa RomeoRZ3.0 i V6
Power
250 hp
186 kW
210 hp
157 kW
Torque
310 Nm
229 lb-ft
245 Nm
181 lb-ft
Acceleration
5.7 s
7.5 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
260 km/h162 mph
Unrestricted
240 km/h149 mph
Restricted
230 km/h143 mph
Lightness
1,350 kg
2,976 lb
1,380 kg
3,042 lb
Fuel consumption
-
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk-
Length
4,250 mm
167.3 in
Height
1,280 mm
50.4 in
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,060 mm
159.8 in
Height
1,300 mm
51.2 in
Range score
-
753 km
468 mi
Trunk score
-
120 L
4.2 cu ft
Power-to-weight score
185 hp/t
138 kW/t
5.4 kg/hp
152 hp/t
113 kW/t
6.6 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
VehicleAlfa Romeo RZ 3.0 i V6
Consumption9.3 L/100 km25.3 mpg US30.4 mpg UK
Cost / 100 km16.28 LC100 km
Cost / 100 mi26.19 LC100 mi
Annual fuel used1,395 L369 US gal307 UK gal
Annual fuel cost2,441 LC/year

Head-to-head comparisons

Porsche 911 Speedster 3.6

  • Has 40 hp more
  • Has 65 Nm more
  • Is 30 kg lighter
  • Is 1.8 s quicker from 0-100 km/h
  • Has 30 km/h (19 mph) higher top speed
  • Has 33 hp/t better power-to-weight

Pros

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

Alfa Romeo RZ 3.0 i V6

No measurable advantages in the available data.

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Speedster 3.6
Alfa Romeo RZ 3.0 i V6
Compare selected cars
2 vehicles selected

Popular comparisons

3.6
3.2 Carrera CAT
VS
Porsche911 Speedster3.6vsPorsche911 Cabriolet (G)3.2 Carrera CAT
3.0 i V6
2.3
VS
Alfa RomeoRZ3.0 i V6vsBMWM3 Convertible (E30)2.3
3.6
Carrera 2 3.6
VS
Porsche911 Speedster3.6vsPorsche911 Targa (964)Carrera 2 3.6
3.0 i V6
3.0 V6
VS
Alfa RomeoRZ3.0 i V6vsAlfa RomeoSpider (916)3.0 V6
3.6
3.2 Carrera
VS
Porsche911 Speedster3.6vsPorsche911 Coupe (G)3.2 Carrera
3.0 i V6
300 CE-24 CAT
VS
Alfa RomeoRZ3.0 i V6vsMercedes-BenzA124300 CE-24 CAT
3.6
3.3 Turbo
VS
Porsche911 Speedster3.6vsPorsche911 Coupe (TYPE 930)3.3 Turbo
3.6
Turbo 3.3
VS
Porsche911 Speedster3.6vsPorsche911 (964)Turbo 3.3
3.0 i V6
2.4 JTDM
VS
Alfa RomeoRZ3.0 i V6vsAlfa RomeoSpider (939)2.4 JTDM
3.6
Carrera 4 3.4
VS
Porsche911 Speedster3.6vsPorsche911 Cabriolet (991)Carrera 4 3.4
3.0 i V6
3.0 16V
VS
Alfa RomeoRZ3.0 i V6vsPorsche968 Cabrio3.0 16V
3.6
3.6
VS
Porsche911 Speedster3.6vsPorsche911 Targa (993)3.6
Porsche 911 Speedster 3.6 vs Alfa Romeo RZ 3.0 i V6 - car comparison - FastVsFaster