The Comparative Analysis :
BMW Z4 Roadster sDrive20i (11 - 13) vs. BMW Z4 Roadster M40i Steptronic Sport (19 - ..)
€ 36,600
€ 61,000
€ 36,600
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 61,000
ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info
Vehicle Dimensions
The Z4 Roadster sDrive20i is slightly smaller in every dimension. It's 3.3 inches shorter, 2.9 inches narrower and 0.5 inches lower than the Z4 Roadster M40i.
Z4 Roadster sDrive20i
Z4 Roadster M40i
50.8
70.5
76.8
51.3
73.4
79.7
70.5 in
Width
73.4 in
76.8 in
Width Incl. Mirrors
79.7 in
50.8 in
Height
51.3 in
98.3
166.9
97.2
170.2
166.9 in
Length
170.2 in
98.3 in
Wheelbase
97.2 in
Vehicle Weight
Z4 Roadster sDrive20i
Z4 Roadster M40i
3241 lb
Curb Weight
3549 lb
3803 lb
Gross Vehicle
Weight
Weight
4101 lb
Weight Difference:
309 lb
8.71 %
General
Z4 Roadster sDrive20i
Z4 Roadster M40i
E89
Generation
G29
Roadster
Car Body Style
Roadster
Premium Unleaded
Fuel Type
Premium Unleaded
Rear-wheel drive
Drivetrain
Rear-wheel drive
6-speed manual transmission
Transmission
8-speed automatic transmission
Engine
Z4 Roadster sDrive20i
Z4 Roadster M40i
Straight-four gasoline engine with turbocharger
Engine Type
Straight-six gasoline engine with two turbochargers (biturbo)
BMW N20
Engine Series
BMW B58
N20-B20
Engine Code
B58-B30
4
Valves
4
4
Cylinders
6
2 L / 98 cu in
Displacement
3 L / 147 cu in
181 hp
at 5000 rpm
Power
335 hp
at 5000 rpm
Z4 Roadster sDrive20i
181 hp
335 hp
Z4 Roadster M40i
199 lb‑ft
at 1250 rpm
Max. Torque
369 lb‑ft
at 1600 rpm
Z4 Roadster sDrive20i
199 lb‑ft
369 lb‑ft
Z4 Roadster M40i
Performance
Z4 Roadster sDrive20i
Z4 Roadster M40i
146 mph
Maximum Speed
155 mph
6.9 sec
Acceleration 0 to 62 mph
4.5 sec
62 mph
62
mph
mph
315 ft
0.000 sec
Z4 Roadster sDrive20i
62 mph
62
mph
mph
207 ft
0.000 sec
Z4 Roadster M40i
▶ REPLAY
17.91 lb/hp
Weight-to-Power Ratio
10.59 lb/hp
Z4 Roadster sDrive20i
17.91 lb/hp
10.59 lb/hp
Z4 Roadster M40i
Fuel Economy / Emissions
Z4 Roadster sDrive20i
Z4 Roadster M40i
Fuel Economy
35 mpg
combined
33 mpg
Z4 Roadster sDrive20i
35 mpg
33 mpg
Z4 Roadster M40i
26 mpg
city
26 mpg
No data
highway
No data
14.5 gal
Fuel Tank Capacity
13.7 gal
503 mi
Range
455 mi
Z4 Roadster sDrive20i
503 mi
455 mi
Z4 Roadster M40i
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).
134.5 kWh
Z4 Roadster sDrive20i
128.7 kWh
134.5 kWh
Z4 Roadster M40i
Euro 5
Emission Standard
Euro 6d-TEMP-EVAP-ISC (WLTP)
256 g/mi (NEFZ)
CO2 Emissions
307 g/mi (WLTP)
Practical Convenience
Z4 Roadster sDrive20i
Z4 Roadster M40i
2
Doors
2
2
No. of Seats
2
562 lb
Maximum Payload
551 lb
8.8 cu ft
Trunk Volume
8 cu ft
No data
Cargo Volume (Seats Down)
No data
