Car comparison

Porsche 911 Speedster 3.6vsCadillac Allante 4.6 i V8 32V

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

Cadillac Allante

4.6 i V8 32V

299 hp4565 ccGasolineFWDAutomaticNaturally aspiratedCabriolet / convertible1993-1996

Comparison overview

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

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
Lightest
1,350 kg
2,976 lb
Best power-to-weight
185 hp/t
138 kW/t
5.4 kg/hp
Lowest highway consumption
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
Best overall score
54/100
Best performance score
63/100

Cadillac Allante 4.6 i V8 32V

Most powerful
299 hp
223 kW
Highest torque
393 Nm
290 lb-ft
Lowest city consumption
14.8 L/100 km
15.9 mpg US
19.1 mpg UK
Best economy score
75/100
Best practicality score
41/100

Specification comparison

Specification comparison
Model	Porsche911 Speedster3.6	CadillacAllante4.6 i V8 32V
Power	250hp186kW	299hp223kW
Torque	310Nm229lb-ft	393Nm290lb-ft
Curb weight	1,350kg2,976lb	1,700kg3,748lb
Gross weight	1,600kg3,527lb	-
Top speed	Unrestricted 270 km/h168 mph Restricted 260 km/h162 mph Calculated	Unrestricted 250 km/h155 mph Restricted 240 km/h149 mph Calculated
To 99% top speed	75.8s99% target: 267 km/h / 166 mph Calculated	96.6s99% target: 248 km/h / 154 mph Calculated
0-100 km/h	5.7s	6.9s
0-200 km/h	19.0s Calculated	27.4s Calculated
0-60 mph	5.4s Calculated	6.5s Calculated
Fuel consumption	-	12L/100 km19.6mpg US23.5mpg UK
Fuel consumption city	17.1L/100 km13.8mpg US16.5mpg UK	14.8L/100 km15.9mpg US19.1mpg UK
Fuel consumption highway	7.8L/100 km30.2mpg US36.2mpg UK	8.6L/100 km27.4mpg US32.8mpg UK
Quarter mile	13.7s Calculated	14.9s Calculated
Power-to-weight	185hp/t138kW/t84hp/1000 lb Calculated	176hp/t131kW/t80hp/1000 lb Calculated
Torque-to-weight	230Nm/t154lb-ft/ton Calculated	231Nm/t155lb-ft/ton Calculated
Estimated range	-	633km394mi Calculated
Displacement	3,600cc220cu in	4,565cc279cu in
Length	4,250mm167in	4,540mm179in
Width	1,652mm65in	1,865mm73in
Height	1,280mm50in	1,310mm52in
Wheelbase	2,272mm89in	2,525mm99in
Front track	1,374mm54in	1,535mm60in
Rear track	1,374mm54in	1,535mm60in
Ground clearance	115mm5in	-
Trunk volume	-	460L
Doors	2	2
Seats	2	2
Fuel tank	77L	76L

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 3.6Cadillac Allante 4.6 i V8 32VPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
Porsche911 Speedster3.6	6,100 rpm	4,800 rpm	6,350 rpm
CadillacAllante4.6 i V8 32V	6,000 rpm	4,400 rpm	6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	Porsche911 Speedster3.6	CadillacAllante4.6 i V8 32V
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.4 s	6.5 s
0-100 km/h 0-62 mph	5.7 s	6.9 s
0-200 km/h 0-124 mph	19.0 s	27.4 s
Top speed	Unrestricted 270 km/h168 mph Restricted 260 km/h162 mph Likely limited	Unrestricted 250 km/h155 mph Restricted 240 km/h149 mph Likely limited
	Drag race simulation
60 ft 18 m	2.3 s	2.4 s
330 ft 101 m	6.1 s	6.5 s
1/8 mile 201 m	9.1 s	9.7 s
1000 ft 305 m	11.6 s	12.5 s
1/4 mile 402 m	13.7 s	14.9 s
Trap speed 1/4 mile 402 m	172 km/h 107 mph	155 km/h 96 mph

Power comparison

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

Chart data table
Vehicle	Value
Porsche911 Speedster3.6	250 hp 186 kW
CadillacAllante4.6 i V8 32V	299 hp 223 kW

Cadillac Allante 4.6 i V8 32V has 49 hp more than Porsche 911 Speedster 3.6.

The biggest power difference is between Porsche 911 Speedster 3.6 and Cadillac Allante 4.6 i V8 32V: 49 hp (37 kW).

Torque comparison

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

Chart data table
Vehicle	Value
Porsche911 Speedster3.6	310 Nm 229 lb-ft
CadillacAllante4.6 i V8 32V	393 Nm 290 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
Porsche911 Speedster3.6	1,350 kg 2,976 lb
CadillacAllante4.6 i V8 32V	1,700 kg 3,748 lb

Top speed without limiter comparison

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

Chart data table
Vehicle	Value
Porsche911 Speedster3.6	Unrestricted 270 km/h168 mph Restricted 260 km/h162 mph
CadillacAllante4.6 i V8 32V	Unrestricted 250 km/h155 mph Restricted 240 km/h149 mph

0-100 km/h comparison

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

Chart data table
Vehicle	Value
Porsche911 Speedster3.6	5.7 s
CadillacAllante4.6 i V8 32V	6.9 s

Although Cadillac Allante 4.6 i V8 32V has more power, Porsche 911 Speedster 3.6 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 Speedster 3.6 and Cadillac Allante 4.6 i V8 32V: 1.2 s.

Power-to-weight comparison

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

Chart data table
Vehicle	Value
Porsche911 Speedster3.6	185 hp/t 138 kW/t 5.4 kg/hp
CadillacAllante4.6 i V8 32V	176 hp/t 131 kW/t 5.7 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
Porsche911 Speedster3.6	250 hp 186 kW	5.7 s	Unrestricted 270 km/h168 mph Restricted 260 km/h162 mph
CadillacAllante4.6 i V8 32V	299 hp 223 kW	6.9 s	Unrestricted 250 km/h155 mph Restricted 240 km/h149 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Vehicle

Performance score

Practicality score

Porsche911 Speedster3.6

Power	250 hp 186 kW
0-100 km/h	5.7 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

CadillacAllante4.6 i V8 32V

Power	299 hp 223 kW
0-100 km/h	6.9 s
Top speed Unrestricted 250 km/h155 mph Restricted 240 km/h149 mph

Doors/seats	2 doors 2 seats
Trunk	460 L 16.2 cu ft
Length	4,540 mm 178.7 in
Height	1,310 mm 51.6 in

Detailed score breakdown

Vehicle

Porsche911 Speedster3.6

CadillacAllante4.6 i V8 32V

Power

250 hp

186 kW

299 hp

223 kW

Torque

310 Nm

229 lb-ft

393 Nm

290 lb-ft

Acceleration

5.7 s

6.9 s

Top speed

Unrestricted

270 km/h168 mph

Restricted

260 km/h162 mph

Unrestricted

250 km/h155 mph

Restricted

240 km/h149 mph

Lightness

1,350 kg

2,976 lb

1,700 kg

3,748 lb

Fuel consumption

12.0 L/100 km

19.6 mpg US

23.5 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	460 L 16.2 cu ft
Length	4,540 mm 178.7 in
Height	1,310 mm 51.6 in

Range score

633 km

394 mi

Trunk score

460 L

16.2 cu ft

Power-to-weight score

185 hp/t

138 kW/t

5.4 kg/hp

176 hp/t

131 kW/t

5.7 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	Cadillac Allante 4.6 i V8 32V
Consumption	12 L/100 km19.6 mpg US23.5 mpg UK
Cost / 100 km	21.00 LC100 km
Cost / 100 mi	33.80 LC100 mi
Annual fuel used	1,800 L476 US gal396 UK gal
Annual fuel cost	3,150 LC/year