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BMW G23 4 Series Cabrio LCI M440i xDrive (2024)

BMW G29 LCI Z4 Roadster M40i (2022)

Porsche 718 Boxster GTS 4.0 (2020)

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Engine Technical Data

Engine type - Number of cylinders

Inline 6

Boxer 6

Engine Code

B58B30B

B58B30

Fuel type

Hybrid / Petrol

Petrol

Fuel System

Direct Injection

Direct Injection.

Direct Injection

Lubrication

Engine Cooling

Engine Alignment

Longitudinal

Engine Position

Front

Central

Engine displacement

182.9 cu-in / 2998 cm³

243.8 cu-in / 3995 cm³

Bore

3.23 inches
82.0 mm

4.02 inches
102.0 mm

Stroke

3.72 inches
94.6 mm

3.21 inches
81.5 mm

Number of valves

Aspiration

Turbo Intercooler

Compression Ratio

10.2

11.0

Max. RPM

Total System Power

369 HP / 374 PS / 275 kW

335 HP / 340 PS / 250 kW

395 HP / 400 PS / 294 kW

Total System Torque

368 lb-ft / 500 Nm

309 lb-ft / 420 Nm

Horsepower

369 HP / 374 PS / 275 kW @ 5500-6500 rpm

335 HP / 340 PS / 250 kW @ 5000 rpm

395 HP / 400 PS / 294 kW @ 7000 rpm

Maximum torque

368 lb-ft / 500 Nm @ 1900-5000 rpm

368 lb-ft / 500 Nm @ 1600 rpm

309 lb-ft / 420 Nm @ 5000 rpm

Total electric power

11 HP / 11 PS / 8 kW

Total electric torque

18 lb-ft / 25 Nm

Number of electric engines

Electric engine #1 type

Electric engine #1 Power

11 HP / 11 PS / 8 kW

Electric engine #1 Torque

18 lb-ft / 25 Nm

Electric engine #2 type

Electric engine #2 Power

Electric engine #2 Torque

Electric engine #3 type

Electric engine #3 Power

Electric engine #3 Torque

Electric engine #4 type

Electric engine #4 Power

Electric engine #4 Torque

Drive wheels - Traction - Drivetrain

AWD

RWD

Transmission Gearbox - Number of speeds

Clutch Type

Automatic

Manual

Size, Dimensions, Aerodynamics and Weight

Body

Cabrio

Roadster

Cabrio

Num. of Doors

Num. of Seats

Seat distribution

Front legroom

Rear seat legroom

Third row legroom

Front shoulder room

Rear shoulder room

Third row shoulder room

Front head room

Rear head room

Third row head room

Wheelbase

112.24 inches / 285.1 cm

97.24 inches / 247.0 cm

97.44 inches / 247.5 cm

Length

187.8 inches / 477.0 cm

170.24 inches / 432.4 cm

172.4 inches / 437.9 cm

Width

72.91 inches / 185.2 cm

73.39 inches / 186.4 cm

70.91 inches / 180.1 cm

Width with mirrors

81.93 inches / 208.1 cm

79.69 inches / 202.4 cm

Height

54.88 inches / 139.4 cm

51.34 inches / 130.4 cm

49.69 inches / 126.2 cm

Front Axle

62.32 inches / 158.3 cm

62.76 inches / 159.4 cm

60.12 inches / 152.7 cm

Rear Axle

62.68 inches / 159.2 cm

62.56 inches / 158.9 cm

60.43 inches / 153.5 cm

Ground clearance

4.96 inches / 12.6 cm4.96 inches / 12.6 cm

4.49 inches / 11.4 cm4.49 inches / 11.4 cm

Cargo box inside length

Cargo box inside height

Cargo width

Max. width at wheelhouse

Loading height

Rear door width

Rear door height

Side door width

Side door height

Approach angle (deg)

Breakover (Rampover) angle (deg)

Departure angle (deg)

Aerodynamic drag coefficient - Cx

0.28

0.31

Front Brakes - Disc dimensions

Vented Discs

Vented Discs (12.99 inches / 330 mm)

Rear Brakes - Disc dimensions

Vented Discs

Vented Discs (11.77 inches / 299 mm)

Front Tyres - Rims dimensions

225/45 R18

255/40 R18

235/35 R20

Rear Tyres - Rims dimensions

255/40 R18

275/40 R18

265/35 R20

Front Wheels Width

7.5

Rear Wheels Width

8.5

Curb Weight

4332 lbs / 1965 kg

3616 lbs / 1640 kg

3298 lbs / 1496 kg

Dry Weight

3042 lbs / 1380 kg

Max. Towing Capacity Weight

3968 lbs / 1800 kg

Weight/Power Output Ratio

5.25 Kg/hp

4.82 Kg/hp

3.74 Kg/hp

Trunk / Boot capacity

13.6 cu-ft / 385 L

9.9 cu-ft / 281 L

9.7 cu-ft / 275 L

Trunk / Boot First Row

Trunk / Boot Second Row

Trunk / Boot Third Row

Steering

Turning circle

39.4 feet / 12.0 m

36.1 feet / 11.0 m

Steering wheel lock-to-lock

Front Suspension

Independent. McPherson. Coil Springs. Anti-roll bar.

Independent Double wishbone. Coil Springs. Anti-roll bar.

Independent. McPherson. Coil Springs. Anti-roll bar.

Rear Suspension

Multi-link. Coil Springs. Anti-roll bar.

Multi-link. Coil Springs.

Independent. Coil Springs. Anti-roll bar.

Top Speed

155 Mph / 250 km/h

182 Mph / 293 km/h

Acceleration 0 to 60 mph (0 to 96 Km/h)

Acceleration 0 to 100 km/h (0 to 62 mph)

4.9 s

4.5 s

Acceleration 0 to 400m (1/4 quarter mile)

Acceleration 0 to 1000m

Fuel Consumption (Economy), Emissions and Range

Fuel Consumption - Economy - Combined

Fuel Consumption - Economy - Open road

Fuel Consumption - Economy - Highway

Fuel Consumption - Economy - City

Fuel Consumption - Economy - City NEDC

15 MPG
15.4 L/100 km
18 MPG UK

Fuel Consumption - Economy - Open road NEDC

29 MPG
8.1 L/100 km
35 MPG UK

Fuel Consumption - Economy - Combined NEDC

22 MPG
10.8 L/100 km
26 MPG UK

Fuel Consumption - Economy - Low WLTP

Fuel Consumption - Economy - Medium WLTP

Fuel Consumption - Economy - High WLTP

Fuel Consumption - Economy - Extra high WLTP

Fuel Consumption - Economy - Combined WLTP

29 MPG
8.1 L/100 km
35 MPG UK

30 MPG
7.9 L/100 km
36 MPG UK

Battery Type

Lithium-ion

Charging Information

Battery capacity

0.4 kWh

Charging Time

Range

Range WLTP

452 miles / 728 km

409 miles / 658 km

Electric Range EPA

Electric Range NEDC

Electric Range WLTP

Average energy consumption

Average energy consumption WLTP

Charging Time

Fast Charging Time

Fuel Tank Capacity

15.6 gallons
59 L
13 UK gallons

13.7 gallons
52 L
11.4 UK gallons

16.9 gallons
64 L
14.1 UK gallons

AdBlue Tank

CO2 emissions

246 g/Km (Porsche)

CO2 emissions WLTP

182 g/Km (BMW)

179 g/Km (BMW)

Emission standard

Euro 6e

Euro 6d - WLTP

Safety

Euro NCAP

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