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BMW Z3 Roadster M
BMW Z3 Roadster M (1997)
Porsche 911 Cabriolet (997) Carrera
Porsche 911 Cabriolet (997) Carrera (2005)
Porsche 911 Cabriolet (993 series) Carrera
Porsche 911 Cabriolet (993 series) Carrera (1995)
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Engine Technical Data
Engine type - Number of cylinders
Inline 6
Boxer 6
Boxer 6
Engine Code
S50B32
Fuel type
Petrol
Petrol
Petrol
Fuel System
Siemens DME MS 41.1
MPI
MPI
Engine Alignment
Longitudinal
Engine Position
Front
Rear
Rear
Engine displacement
195.3 cu-in / 3201 cm3
219.4 cu-in / 3596 cm3
219.7 cu-in / 3600 cm3
Bore
3.4 inches
86.4 mm
3.78 inches
96.0 mm
3.94 inches
100.0 mm
Stroke
3.58 inches
91 mm
3.26 inches
82.8 mm
3.01 inches
76.4 mm
Number of valves
24
24
12
Aspiration
N/A
N/A
N/A
Compression Ratio
11.3
11.3
11.3
Horsepower
317 HP / 321 PS / 236 kW @ 7400 rpm
321 HP / 325 PS / 239 kW @ 6800 rpm
281 HP / 285 PS / 210 kW @ 6100 rpm
Maximum torque
258 lb-ft / 350 Nm @ 3250 rpm
272 lb-ft / 370 Nm @ 4250 rpm
250 lb-ft / 340 Nm @ 5250 rpm
Drive wheels - Traction - Drivetrain
RWD
RWD
RWD
Transmission Gearbox - Number of speeds
6
6
6
Clutch Type
Manual
Manual
Manual
Size, Dimensions, Aerodynamics and Weight
Body
Roadster
Num. of Doors
2
2
2
Num. of Seats
2
4
4
Wheelbase
96.81 inches / 245.9 cm
92.52 inches / 235.0 cm
89.37 inches / 227.0 cm
Length
158.46 inches / 402.5 cm
174.29 inches / 442.7 cm
166.93 inches / 424.0 cm
Width
68.5 inches / 174 cm
71.18 inches / 180.8 cm
68.5 inches / 174.0 cm
Height
49.84 inches / 126.6 cm
51.57 inches / 131.0 cm
51.18 inches / 130.0 cm
Aerodynamic drag coefficient - Cx
0.42
0.29
Front Brakes - Disc dimensions
Vented Discs (12.4 inches / 315 mm)
Vented Discs (12.52 inches / 318 mm)
Vented Discs
Rear Brakes - Disc dimensions
Vented Discs (12.28 inches / 312 mm)
Vented Discs (11.77 inches / 299 mm)
Vented Discs
Front Tyres - Rims dimensions
225/45 R17
235/40 R18
255/40 R17
Rear Tyres - Rims dimensions
245/40 R17
265/40 R18
255/40 R17
Curb Weight
3142 lbs / 1425 kg
3075 lbs / 1395 kg
3020 lbs / 1370 kg
Weight/Power Output Ratio
4.44 Kg/hp
4.29 Kg/hp
4.81 Kg/hp
Trunk / Boot capacity
5.8 cu-ft / 165 L
4.8 cu-ft / 135 L
4.3 cu-ft / 123 L
Front Suspension
Single-joint spring struts
Independent. McPherson. Coil Springs. Anti-roll bar.
Rear Suspension
Semi-trailing arm
A-Arm. Double wishbones. Anti-roll bar
Top Speed
155 Mph / 250 km/h
177 Mph / 285 km/h
171 Mph / 275 km/h
Acceleration 0 to 60 mph (0 to 96 Km/h)
5.3 s
Acceleration 0 to 100 km/h (0 to 62 mph)
5.4 s
5.2 s
5.4 s
Acceleration 0 to 1000m
24.4 s
24.1 s
Fuel Consumption (Economy), Emissions and Range
Fuel Consumption - Economy - Combined
20 MPG
11.9 L/100 km
24 MPG UK
Fuel Consumption - Economy - Open road
27 MPG
8.6 L/100 km
33 MPG UK
Fuel Consumption - Economy - City
13 MPG
17.6 L/100 km
16 MPG UK
Fuel Consumption - Economy - City NEDC
14 MPG
16.6 L/100 km
17 MPG UK
14 MPG
16.4 L/100 km
17 MPG UK
Fuel Consumption - Economy - Open road NEDC
30 MPG
7.9 L/100 km
36 MPG UK
29 MPG
8.1 L/100 km
35 MPG UK
Fuel Consumption - Economy - Combined NEDC
21 MPG
11.1 L/100 km
25 MPG UK
21 MPG
11.2 L/100 km
25 MPG UK
Range
386 miles / 621 km
Fuel Tank Capacity
13.5 gallons
51 L
11.2 UK gallons
16.9 gallons
64 L
14.1 UK gallons
19.5 gallons
74 L
16.3 UK gallons
CO2 emissions
268 g/Km (BMW)
270 g/Km (Porsche)



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