Car comparison

Opel Signum · Facelift 2005 2.8i V6 24V TurbovsAlfa Romeo 147 GTA 3.2 V6

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

New comparison

Opel Signum · Facelift 2005

2.8i V6 24V Turbo

250 hp2792 ccGasolineFWDAutomaticTurbochargedHatchback2006-2008

Alfa Romeo 147 GTA

3.2 V6

250 hp3179 ccGasolineFWDManualNaturally aspiratedHatchback2003-2006

Comparison overview

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

Opel Signum Facelift 2005 2.8i V6 24V Turbo

Fastest top speed
247 km/h
153 mph
Most powerful
250 hp
186 kW
Highest torque
350 Nm
258 lb-ft
Lowest city consumption
17.4 L/100 km
13.5 mpg US
16.2 mpg UK
Lowest highway consumption
7.6 L/100 km
30.9 mpg US
37.2 mpg UK
Largest trunk
365 L
Best overall score
61/100
Best practicality score
74/100

Alfa Romeo 147 GTA 3.2 V6

Quickest 0-100 km/h
6.3 s
Lightest
1,360 kg
2,998 lb
Best power-to-weight
184 hp/t
137 kW/t
5.4 kg/hp
Best performance score
58/100
Best economy score
74/100

Specification comparison

Specification comparison
Model	OpelSignumFacelift 20052.8i V6 24V Turbo	Alfa Romeo147 GTA3.2 V6
Power	250hp186kW	250hp186kW
Torque	350Nm258lb-ft	300Nm221lb-ft
Curb weight	1,580kg3,483lb	1,360kg2,998lb
Gross weight	2,175kg4,795lb	1,880kg4,145lb
Top speed	247 km/h 153 mph	246 km/h 153 mph
To 99% top speed	94.7s99% target: 245 km/h / 152 mph Calculated	71.5s99% target: 244 km/h / 151 mph Calculated
0-100 km/h	7.6s	6.3s
0-200 km/h	29.1s Calculated	23.2s Calculated
0-60 mph	7.2s Calculated	6.0s Calculated
Fuel consumption	-	12.1L/100 km19.4mpg US23.3mpg UK
Fuel consumption city	17.4L/100 km13.5mpg US16.2mpg UK	18.1L/100 km13mpg US15.6mpg UK
Fuel consumption highway	7.6L/100 km30.9mpg US37.2mpg UK	8.6L/100 km27.4mpg US32.8mpg UK
Quarter mile	15.4s Calculated	14.4s Calculated
Power-to-weight	158hp/t118kW/t72hp/1000 lb Calculated	184hp/t137kW/t83hp/1000 lb Calculated
Torque-to-weight	222Nm/t148lb-ft/ton Calculated	221Nm/t148lb-ft/ton Calculated
Estimated range	-	521km324mi Calculated
Displacement	2,792cc170cu in	3,179cc194cu in
Length	4,651mm183in	4,213mm166in
Width	1,798mm71in	1,764mm69in
Height	1,466mm58in	1,412mm56in
Wheelbase	2,830mm111in	2,546mm100in
Front track	1,536mm60in	1,516mm60in
Rear track	1,525mm60in	1,504mm59in
Trunk volume	365L	280L
Max trunk volume	1,410L	1,030L
Doors	5	3
Seats	5	5
Fuel tank	60L	63L
CO2 emissions	-	287g/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.

Opel Signum Facelift 2005 2.8i V6 24V TurboAlfa Romeo 147 GTA 3.2 V6PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
OpelSignumFacelift 20052.8i V6 24V Turbo	5,500 rpm	-	5,750 rpm
Alfa Romeo147 GTA3.2 V6	6,200 rpm	4,800 rpm	6,450 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	OpelSignumFacelift 20052.8i V6 24V Turbo	Alfa Romeo147 GTA3.2 V6
	Acceleration checkpoints
0-60 mph 0-97 km/h	7.2 s	6.0 s
0-100 km/h 0-62 mph	7.6 s	6.3 s
0-200 km/h 0-124 mph	29.1 s	23.2 s
Top speed	247 km/h 153 mph	246 km/h 153 mph
	Drag race simulation
60 ft 18 m	2.6 s	2.4 s
330 ft 101 m	6.8 s	6.3 s
1/8 mile 201 m	10.2 s	9.4 s
1000 ft 305 m	13.0 s	12.1 s
1/4 mile 402 m	15.4 s	14.4 s
Trap speed 1/4 mile 402 m	152 km/h 95 mph	163 km/h 102 mph

Power comparison

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

Chart data table
Vehicle	Value
OpelSignumFacelift 20052.8i V6 24V Turbo	250 hp 186 kW
Alfa Romeo147 GTA3.2 V6	250 hp 186 kW

Torque comparison

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

Chart data table
Vehicle	Value
OpelSignumFacelift 20052.8i V6 24V Turbo	350 Nm 258 lb-ft
Alfa Romeo147 GTA3.2 V6	300 Nm 221 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
OpelSignumFacelift 20052.8i V6 24V Turbo	1,580 kg 3,483 lb
Alfa Romeo147 GTA3.2 V6	1,360 kg 2,998 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
OpelSignumFacelift 20052.8i V6 24V Turbo	247 km/h 153 mph
Alfa Romeo147 GTA3.2 V6	246 km/h 153 mph

0-100 km/h comparison

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

Chart data table
Vehicle	Value
OpelSignumFacelift 20052.8i V6 24V Turbo	7.6 s
Alfa Romeo147 GTA3.2 V6	6.3 s

The biggest 0-100 km/h difference is between Alfa Romeo 147 GTA 3.2 V6 and Opel Signum Facelift 2005 2.8i V6 24V Turbo: 1.3 s.

Power-to-weight comparison

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

Chart data table
Vehicle	Value
OpelSignumFacelift 20052.8i V6 24V Turbo	158 hp/t 118 kW/t 6.3 kg/hp
Alfa Romeo147 GTA3.2 V6	184 hp/t 137 kW/t 5.4 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
OpelSignumFacelift 20052.8i V6 24V Turbo	250 hp 186 kW	7.6 s	247 km/h 153 mph
Alfa Romeo147 GTA3.2 V6	250 hp 186 kW	6.3 s	246 km/h 153 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

OpelSignumFacelift 20052.8i V6 24V Turbo

Power	250 hp 186 kW
0-100 km/h	7.6 s
Top speed 247 km/h 153 mph

Doors/seats	5 doors 5 seats
Trunk	365 L 12.9 cu ft
Length	4,651 mm 183.1 in
Height	1,466 mm 57.7 in

Alfa Romeo147 GTA3.2 V6

Power	250 hp 186 kW
0-100 km/h	6.3 s
Top speed 246 km/h 153 mph

Doors/seats	3 doors 5 seats
Trunk	280 L 9.9 cu ft
Length	4,213 mm 165.9 in
Height	1,412 mm 55.6 in

Detailed score breakdown

Vehicle

OpelSignumFacelift 20052.8i V6 24V Turbo

Alfa Romeo147 GTA3.2 V6

Power

250 hp

186 kW

250 hp

186 kW

Torque

350 Nm

258 lb-ft

300 Nm

221 lb-ft

Acceleration

7.6 s

6.3 s

Top speed

247 km/h

153 mph

246 km/h

153 mph

Lightness

1,580 kg

3,483 lb

1,360 kg

2,998 lb

Fuel consumption

12.1 L/100 km

19.4 mpg US

23.3 mpg UK

Practicality

Doors/seats	5 doors 5 seats
Trunk	365 L 12.9 cu ft
Length	4,651 mm 183.1 in
Height	1,466 mm 57.7 in

Doors/seats	3 doors 5 seats
Trunk	280 L 9.9 cu ft
Length	4,213 mm 165.9 in
Height	1,412 mm 55.6 in

Range score

521 km

324 mi

CO2 score

287 g/km

Trunk score

365 L

12.9 cu ft

280 L

9.9 cu ft

Power-to-weight score

158 hp/t

118 kW/t

6.3 kg/hp

184 hp/t

137 kW/t

5.4 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	Alfa Romeo 147 GTA 3.2 V6
Consumption	12.1 L/100 km19.4 mpg US23.3 mpg UK
Cost / 100 km	21.18 LC100 km
Cost / 100 mi	34.08 LC100 mi
Annual fuel used	1,815 L479 US gal399 UK gal
Annual fuel cost	3,176 LC/year