The Comparative Analysis :
BMW Z4 Roadster sDrive30i (09 - 11) vs. Alfa Romeo Spider 2.4 JTDM 20V Q-Tronic (08 - 10)
€ 43,400
€ 40,500
€ 43,400
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 sDrive30i is considerably smaller in every dimension. It's 6.1 inches shorter, 1.6 inches narrower and 1.1 inches lower than the Alfa Romeo Spider 2.4 JTDM 20V.
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
50.8
70.5
76.8
51.9
72
80.1
70.5 in
Width
72 in
76.8 in
Width Incl. Mirrors
80.1 in
50.8 in
Height
51.9 in
98.3
166.9
99.5
173
166.9 in
Length
173 in
98.3 in
Wheelbase
99.5 in
Vehicle Weight
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
3285 lb
Curb Weight
3814 lb
3847 lb
Gross Vehicle
Weight
Weight
4420 lb
Weight Difference:
529 lb
13.87 %
General
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
E89
Generation
Typ 939
Roadster
Car Body Style
Roadster
Premium Unleaded
Fuel Type
Diesel
Rear-wheel drive
Drivetrain
Front-wheel drive
6-speed manual transmission
Transmission
6-speed automatic transmission
Engine
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
Straight-six gasoline engine (naturally aspirated engine)
Engine Type
Straight-five diesel engine with turbocharger
BMW N52
Engine Series
N52-B30
Engine Code
939 A3.000
4
Valves
4
6
Cylinders
5
3 L / 147 cu in
Displacement
2.4 L / 117 cu in
254 hp
at 6600 rpm
Power
197 hp
at 4000 rpm
BMW Z4 Roadster sDrive30i
254 hp
197 hp
Alfa Romeo Spider 2.4 JTDM 20V
229 lb‑ft
at 2600 rpm
Max. Torque
295 lb‑ft
at 2000 rpm
BMW Z4 Roadster sDrive30i
229 lb‑ft
295 lb‑ft
Alfa Romeo Spider 2.4 JTDM 20V
Performance
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
155 mph
Maximum Speed
140 mph
5.8 sec
Acceleration 0 to 62 mph
8.5 sec
62 mph
62
mph
mph
266 ft
0.000 sec
BMW Z4 Roadster sDrive30i
62 mph
62
mph
mph
387 ft
0.000 sec
Alfa Romeo Spider 2.4 JTDM 20V
▶ REPLAY
12.93 lb/hp
Weight-to-Power Ratio
19.36 lb/hp
BMW Z4 Roadster sDrive30i
12.93 lb/hp
19.36 lb/hp
Alfa Romeo Spider 2.4 JTDM 20V
Fuel Economy / Emissions
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
Fuel Economy
28 mpg
combined
30 mpg
BMW Z4 Roadster sDrive30i
28 mpg
30 mpg
Alfa Romeo Spider 2.4 JTDM 20V
19 mpg
city
21 mpg
No data
highway
No data
14.5 gal
Fuel Tank Capacity
18.5 gal
402 mi
Range
551 mi
BMW Z4 Roadster sDrive30i
402 mi
551 mi
Alfa Romeo Spider 2.4 JTDM 20V
Environmental Impact
161.1 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 sDrive30i
161.1 kWh
162.5 kWh
Alfa Romeo Spider 2.4 JTDM 20V
Euro 5
Emission Standard
Euro 4
320 g/mi (NEFZ)
CO2 Emissions
335 g/mi (NEFZ)
Practical Convenience
BMW Z4 Roadster sDrive30i
Alfa Romeo Spider 2.4 JTDM 20V
2
Doors
2
2
No. of Seats
2
562 lb
Maximum Payload
606 lb
8.8 cu ft
Trunk Volume
7.2 cu ft
No data
Cargo Volume (Seats Down)
No data
