The Comparative Analysis :
BMW Z4 Roadster sDrive20i (11 - 13) vs. Alfa Romeo Spider 2.4 JTDM 20V DPF (07 - 08)
€ 36,600
€ 38,200
€ 36,600
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 38,200
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The BMW Z4 Roadster sDrive20i 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 DPF.
BMW Z4 Roadster sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
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 sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
3241 lb
Curb Weight
3825 lb
3803 lb
Gross Vehicle
Weight
Weight
4321 lb
Weight Difference:
584 lb
15.27 %
General
BMW Z4 Roadster sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
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 manual transmission
Engine
BMW Z4 Roadster sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
Straight-four gasoline engine with turbocharger
Engine Type
Straight-five diesel engine with turbocharger
BMW N20
Engine Series
N20-B20
Engine Code
939 A3.000
4
Valves
4
4
Cylinders
5
2 L / 98 cu in
Displacement
2.4 L / 117 cu in
181 hp
at 5000 rpm
Power
197 hp
at 4000 rpm
BMW Z4 Roadster sDrive20i
181 hp
197 hp
Alfa Romeo Spider 2.4 JTDM 20V DPF
199 lb‑ft
at 1250 rpm
Max. Torque
295 lb‑ft
at 2000 rpm
BMW Z4 Roadster sDrive20i
199 lb‑ft
295 lb‑ft
Alfa Romeo Spider 2.4 JTDM 20V DPF
Performance
BMW Z4 Roadster sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
146 mph
Maximum Speed
142 mph
6.9 sec
Acceleration 0 to 62 mph
8.4 sec
62 mph
62
mph
mph
315 ft
0.000 sec
BMW Z4 Roadster sDrive20i
62 mph
62
mph
mph
384 ft
0.000 sec
Alfa Romeo Spider 2.4 JTDM 20V DPF
▶ REPLAY
17.91 lb/hp
Weight-to-Power Ratio
19.42 lb/hp
BMW Z4 Roadster sDrive20i
17.91 lb/hp
19.42 lb/hp
Alfa Romeo Spider 2.4 JTDM 20V DPF
Fuel Economy / Emissions
BMW Z4 Roadster sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
Fuel Economy
35 mpg
combined
35 mpg
BMW Z4 Roadster sDrive20i
35 mpg
35 mpg
Alfa Romeo Spider 2.4 JTDM 20V DPF
26 mpg
city
26 mpg
No data
highway
No data
14.5 gal
Fuel Tank Capacity
18.5 gal
503 mi
Range
639 mi
BMW Z4 Roadster sDrive20i
503 mi
639 mi
Alfa Romeo Spider 2.4 JTDM 20V DPF
Environmental Impact
128.7 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).
139.9 kWh
BMW Z4 Roadster sDrive20i
128.7 kWh
139.9 kWh
Alfa Romeo Spider 2.4 JTDM 20V DPF
Euro 5
Emission Standard
Euro 4
256 g/mi (NEFZ)
CO2 Emissions
288 g/mi (NEFZ)
Practical Convenience
BMW Z4 Roadster sDrive20i
Alfa Romeo Spider 2.4 JTDM 20V DPF
2
Doors
2
2
No. of Seats
2
562 lb
Maximum Payload
496 lb
8.8 cu ft
Trunk Volume
7.2 cu ft
No data
Cargo Volume (Seats Down)
No data
