Car comparison

BMW 6 Series Convertible (E64) · Facelift 2007 635dvsAlfa Romeo Spider (939) 3.2 JTS V6

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

New comparison

BMW 6 Series Convertible (E64) · Facelift 2007

635d

286 hp2993 ccDieselRWDAutomaticTurbochargedCabriolet / convertible2007-2010

Alfa Romeo Spider (939)

3.2 JTS V6

260 hp3195 ccGasolineFWDManualNaturally aspiratedCabriolet / convertible2008-2010

Comparison overview

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

BMW 6 Series Convertible (E64) Facelift 2007 635d

Quickest 0-100 km/h
6.6 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
286 hp
213 kW
Highest torque
580 Nm
428 lb-ft
Lowest combined fuel consumption
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
Lowest city consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Lowest highway consumption
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
Lowest CO2 emissions
190 g/km
Best estimated range
972 km
604 mi
Largest trunk
450 L
Best overall score
60/100
Best performance score
64/100
Best economy score
87/100
Best practicality score
51/100

Alfa Romeo Spider (939) 3.2 JTS V6

Lightest
1,600 kg
3,527 lb
Best power-to-weight
163 hp/t
121 kW/t
6.2 kg/hp

Specification comparison

Specification comparison
Model	BMW6 Series Convertible (E64)Facelift 2007635d	Alfa RomeoSpider (939)3.2 JTS V6
Power	286hp213kW	260hp194kW
Torque	580Nm428lb-ft	322Nm237lb-ft
Curb weight	1,860kg4,101lb	1,600kg3,527lb
Gross weight	2,260kg4,982lb	1,950kg4,299lb
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	250 km/h 155 mph
To 99% top speed	97.5s99% target: 257 km/h / 160 mph Calculated	105.3s99% target: 248 km/h / 154 mph Calculated
0-100 km/h	6.6s	7.2s
0-200 km/h	24.8s Calculated	29.2s Calculated
0-60 mph	6.3s Calculated	6.8s Calculated
Fuel consumption	7.2L/100 km32.7mpg US39.2mpg UK	11.1L/100 km21.2mpg US25.4mpg UK
Fuel consumption city	9.6L/100 km24.5mpg US29.4mpg UK	16.5L/100 km14.3mpg US17.1mpg UK
Fuel consumption highway	5.8L/100 km40.6mpg US48.7mpg UK	7.9L/100 km29.8mpg US35.8mpg UK
Quarter mile	14.6s Calculated	15.1s Calculated
Power-to-weight	154hp/t115kW/t70hp/1000 lb Calculated	163hp/t121kW/t74hp/1000 lb Calculated
Torque-to-weight	312Nm/t209lb-ft/ton Calculated	201Nm/t135lb-ft/ton Calculated
Estimated range	972km604mi Calculated	631km392mi Calculated
Displacement	2,993cc183cu in	3,195cc195cu in
Length	4,820mm190in	4,393mm173in
Width	1,855mm73in	1,830mm72in
Height	1,374mm54in	1,318mm52in
Wheelbase	2,780mm109in	2,528mm100in
Front track	1,558mm61in	1,579mm62in
Rear track	1,596mm63in	1,559mm61in
Trunk volume	450L	253L
Doors	2	2
Seats	4	2
Fuel tank	70L	70L
CO2 emissions	190g/km	262g/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.

BMW 6 Series Convertible (E64) Facelift 2007 635dAlfa Romeo Spider (939) 3.2 JTS V6PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW6 Series Convertible (E64)Facelift 2007635d	4,400 rpm	1,750-2,250 rpm	4,650 rpm
Alfa RomeoSpider (939)3.2 JTS V6	6,300 rpm	4,500 rpm	6,550 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW6 Series Convertible (E64)Facelift 2007635d	Alfa RomeoSpider (939)3.2 JTS V6
	Acceleration checkpoints
0-60 mph 0-97 km/h	6.3 s	6.8 s
0-100 km/h 0-62 mph	6.6 s	7.2 s
0-200 km/h 0-124 mph	24.8 s	29.2 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited	250 km/h 155 mph
	Drag race simulation
60 ft 18 m	2.4 s	2.4 s
330 ft 101 m	6.4 s	6.5 s
1/8 mile 201 m	9.6 s	9.9 s
1000 ft 305 m	12.3 s	12.7 s
1/4 mile 402 m	14.6 s	15.1 s
Trap speed 1/4 mile 402 m	159 km/h 99 mph	152 km/h 95 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	286 hp 213 kW
Alfa RomeoSpider (939)3.2 JTS V6	260 hp 194 kW

BMW 6 Series Convertible (E64) Facelift 2007 635d has 26 hp more than Alfa Romeo Spider (939) 3.2 JTS V6.

The biggest power difference is between Alfa Romeo Spider (939) 3.2 JTS V6 and BMW 6 Series Convertible (E64) Facelift 2007 635d: 26 hp (19 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	580 Nm 428 lb-ft
Alfa RomeoSpider (939)3.2 JTS V6	322 Nm 237 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	1,860 kg 4,101 lb
Alfa RomeoSpider (939)3.2 JTS V6	1,600 kg 3,527 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
BMW6 Series Convertible (E64)Facelift 2007635d	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
Alfa RomeoSpider (939)3.2 JTS V6	250 km/h 155 mph

0-100 km/h comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	6.6 s
Alfa RomeoSpider (939)3.2 JTS V6	7.2 s

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (E64) Facelift 2007 635d and Alfa Romeo Spider (939) 3.2 JTS V6: 0.6 s.

Fuel consumption comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	7.2 L/100 km 32.7 mpg US 39.2 mpg UK
Alfa RomeoSpider (939)3.2 JTS V6	11.1 L/100 km 21.2 mpg US 25.4 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Convertible (E64) Facelift 2007 635d and Alfa Romeo Spider (939) 3.2 JTS V6: 3.9 L/100 km.

Power-to-weight comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	154 hp/t 115 kW/t 6.5 kg/hp
Alfa RomeoSpider (939)3.2 JTS V6	163 hp/t 121 kW/t 6.2 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)Facelift 2007635d	972 km 604 mi
Alfa RomeoSpider (939)3.2 JTS V6	631 km 392 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW6 Series Convertible (E64)Facelift 2007635d	286 hp 213 kW	6.6 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
Alfa RomeoSpider (939)3.2 JTS V6	260 hp 194 kW	7.2 s	250 km/h 155 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

BMW6 Series Convertible (E64)Facelift 2007635d

Power	286 hp 213 kW
0-100 km/h	6.6 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

Alfa RomeoSpider (939)3.2 JTS V6

Power	260 hp 194 kW
0-100 km/h	7.2 s
Top speed 250 km/h 155 mph

Doors/seats	2 doors 2 seats
Trunk	253 L 8.9 cu ft
Length	4,393 mm 173.0 in
Height	1,318 mm 51.9 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Vehicle

Performance score

Fuel economy score

BMW6 Series Convertible (E64)Facelift 2007635d

Power	286 hp 213 kW
0-100 km/h	6.6 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

7.2 L/100 km

32.7 mpg US

39.2 mpg UK

Alfa RomeoSpider (939)3.2 JTS V6

Power	260 hp 194 kW
0-100 km/h	7.2 s
Top speed 250 km/h 155 mph

11.1 L/100 km

21.2 mpg US

25.4 mpg UK

BMW 6 Series Convertible (E64) 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
BMW6 Series Convertible (E64)Facelift 2007635d	7.2 L/100 km 32.7 mpg US 39.2 mpg UK	6.6 s
Alfa RomeoSpider (939)3.2 JTS V6	11.1 L/100 km 21.2 mpg US 25.4 mpg UK	7.2 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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
BMW6 Series Convertible (E64)Facelift 2007635d	154 hp/t 115 kW/t 6.5 kg/hp	7.2 L/100 km 32.7 mpg US 39.2 mpg UK
Alfa RomeoSpider (939)3.2 JTS V6	163 hp/t 121 kW/t 6.2 kg/hp	11.1 L/100 km 21.2 mpg US 25.4 mpg UK

Detailed score breakdown

Vehicle

BMW6 Series Convertible (E64)Facelift 2007635d

Alfa RomeoSpider (939)3.2 JTS V6

Power

286 hp

213 kW

260 hp

194 kW

Torque

580 Nm

428 lb-ft

322 Nm

237 lb-ft

Acceleration

6.6 s

7.2 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

250 km/h

155 mph

Lightness

1,860 kg

4,101 lb

1,600 kg

3,527 lb

Fuel consumption

7.2 L/100 km

32.7 mpg US

39.2 mpg UK

11.1 L/100 km

21.2 mpg US

25.4 mpg UK

Practicality

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

Doors/seats	2 doors 2 seats
Trunk	253 L 8.9 cu ft
Length	4,393 mm 173.0 in
Height	1,318 mm 51.9 in

Range score

972 km

604 mi

631 km

392 mi

CO2 score

190 g/km

262 g/km

Trunk score

450 L

15.9 cu ft

253 L

8.9 cu ft

Power-to-weight score

154 hp/t

115 kW/t

6.5 kg/hp

163 hp/t

121 kW/t

6.2 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	BMW 6 Series Convertible (E64) Facelift 2007 635d	Alfa Romeo Spider (939) 3.2 JTS V6
Consumption	7.2 L/100 km32.7 mpg US39.2 mpg UK	11.1 L/100 km21.2 mpg US25.4 mpg UK
Cost / 100 km	12.60 LC100 km	19.43 LC100 km
Cost / 100 mi	20.28 LC100 mi	31.26 LC100 mi
Annual fuel used	1,080 L285 US gal238 UK gal	1,665 L440 US gal366 UK gal
Annual fuel cost	1,890 LC/year	2,914 LC/year