The Comparative Analysis :
BMW Z4 Roadster sDrive35is Sport-Automatic DKG (10 - 13) vs. Alfa Romeo Spider 2.4 JTDM 20V Q-Tronic (08 - 10)
€ 57,300

€ 40,500

€ 57,300
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 40,500
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The BMW Z4 Roadster sDrive35is is considerably smaller in every dimension. It's 14.9 cm shorter, 4 cm narrower and 3.4 cm lower than the Alfa Romeo Spider 2.4 JTDM 20V.
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
1284
1790
1951
1318
1830
2035
1790 mm
Width
1830 mm
1951 mm
Width Incl. Mirrors
2035 mm
1284 mm
Height
1318 mm
2496
4244
2528
4393
4244 mm
Length
4393 mm
2496 mm
Wheelbase
2528 mm
Vehicle Weight
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
1600 kg
Kerb Weight
1730 kg
1855 kg
Gross Vehicle
Weight
Weight
2005 kg

Weight Difference:
130 kg
7.51 %

General
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
E89
Generation
Typ 939
Roadster
Car Body Style
Roadster
Super Unleaded (98 RON)
Fuel Type
Diesel

Rear-wheel drive
Drive
Front-wheel drive

7-speed dual clutch transmission
Transmission
6-speed automatic transmission
Engine
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
Straight-six petrol engine with two turbochargers (biturbo)
Engine Type
Straight-five diesel engine with turbocharger
BMW N54
Engine Series
N54-B30
Engine Code
939 A3.000

4
Valves
4
6
Cylinders
5
2979 CC
Engine Capacity
2387 CC
335 bhp
at 5900 rpm
Power
197 bhp
at 4000 rpm
BMW Z4 Roadster sDrive35is
335 bhp
197 bhp
Alfa Romeo Spider 2.4 JTDM 20V
450 NM
at 1500 rpm
Max. Torque
400 NM
at 2000 rpm
BMW Z4 Roadster sDrive35is
450 NM
400 NM
Alfa Romeo Spider 2.4 JTDM 20V
Performance
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
155 mph
Maximum Speed
140 mph
4.8 sec
Acceleration 0 to 62 mph
8.5 sec
62 mph
62
mph
mph
67 m
0.000 sec

BMW Z4 Roadster sDrive35is
62 mph
62
mph
mph
118 m
0.000 sec

Alfa Romeo Spider 2.4 JTDM 20V
▶ REPLAY
4.78 kg/bhp
Weight-to-Power Ratio
8.78 kg/bhp
BMW Z4 Roadster sDrive35is
4.78 kg/bhp
8.78 kg/bhp
Alfa Romeo Spider 2.4 JTDM 20V
Fuel Economy / Emissions
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
Fuel Economy
31 mpg
combined
36 mpg
BMW Z4 Roadster sDrive35is
31 mpg
36 mpg
Alfa Romeo Spider 2.4 JTDM 20V
22 mpg
city
25 mpg
No data
motorway
No data
55 L
Fuel Tank Capacity
70 L
380 mi
Range
551 mi
BMW Z4 Roadster sDrive35is
380 mi
551 mi
Alfa Romeo Spider 2.4 JTDM 20V
Environmental Impact
170.4 kWh
Total Energy Consumption
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
162.5 kWh
BMW Z4 Roadster sDrive35is
170.4 kWh
162.5 kWh
Alfa Romeo Spider 2.4 JTDM 20V
Euro 5
Emission Standard
Euro 4
210 g/km (NEFZ)
CO2 Emissions
208 g/km (NEFZ)
Practical Convenience
BMW Z4 Roadster sDrive35is
Alfa Romeo Spider 2.4 JTDM 20V
2
Doors
2
2
No. of Seats
2
255 kg
Maximum Payload
275 kg
310 L
Boot Capacity
253 L






No data
Boot Capacity (Seats Down)
No data