Compare BMW M4 F83 Convertible vs Alpina B6 F12 vs Alpina Roadster V8
Variants
M4
M4 DCT
M4 Competition
M4 Competition DCT
B6 Bi-Turbo
B6 Bi-Turbo EDITION 50
Capacity
Cargo Capacity
220 L / 7.8 cu-ft ~ 370 L / 13.1 cu-ft
300 L / 10.6 cu-ft ~ 350 L / 12.4 cu-ft
Coolant Capacity
13.9 L / 14.7 qt
Engine Oil Capacity
6.5 L / 6.9 qt
Fuel Capacity
60.0 L / 15.9 gal
70.0 L / 18.5 gal
73.0 L / 19.3 gal
Passengers
4
4
2
Payload
410 kg / 904 lbs
335 kg / 739 lbs
Chassis
Brakes | Front
Ventilated discs
Ventilated discs
Ventilated discs
Brakes | Rear
Ventilated discs
Ventilated discs
Ventilated discs
Power Steering
Electric Steering
Electric Steering
Hydraulic Steering
Suspension | Front
MacPherson strut
Double-wishbone
Double-wishbone
Suspension | Rear
Multi-link
Multi-link
Double-wishbone
Tire Size
255/35 R20
Turning Circle
12.2 m / 40.0 ft
Construction
Body Style
2-door Convertible
2-door Convertible
2-door Convertible
Dimensions
Size | Height
1320 mm / 52.0 in
Size | Length
4671 mm / 183.9 in
4894 mm / 192.7 in
4400 mm / 173.2 in
Size | Width
1830 mm / 72.0 in
Track Width | Front
1579.0 mm / 62.2 in
1594.0 mm / 62.8 in
1550.0 mm / 61.0 in
Track Width | Rear
1570.0 mm / 61.8 in
Weight
2020.0 kg / 4453.3 lbs
1615.0 kg / 3560.5 lbs
Wheelbase
2812 mm / 110.7 in
2855 mm / 112.4 in
2505 mm / 98.6 in
Performance
Acceleration | 0 - 100 km/h
5.3 sec
Acceleration | 0 - 60 mph
5.0 sec
CO2 Emission
224 g/km
Coefficient Of Drag
0.34
Fuel Economy
9.6 L/100km / 24.5 MPG (combined) | 13.2 L/100km / 17.8 MPG (urban) | 7.5 L/100km / 31.4 MPG (highway)
9.3 L/100km / 25.3 MPG (combined) | 15.0 L/100km / 15.7 MPG (urban) | 7.5 L/100km / 31.4 MPG (highway)
Top Speed
250.0 km/h / 155.3 mph
260.0 km/h / 161.6 mph
Powertrain
Drivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Emission Standard
Euro 6
Engine
S55B30
Engine | Bore
84.0 mm / 3.3 in
89.0 mm / 3.5 in
Engine | Compression Ratio
10.2:1
10.0:1
10.5:1
Engine | Displacement
3.0 L / 181.8 cu-in / 2979.0 cc
4.4 L / 268.2 cu-in / 4395.0 cc
4.8 L / 295.2 cu-in / 4837.0 cc
Engine | Power
381.0 hp / 284.1 kW @ 5800 rpm
Engine | Specific Output
78.8 hp/L / 1.3 hp/cu-in
Engine | Stroke
89.6 mm / 3.5 in
88.3 mm / 3.5 in
89.0 mm / 3.5 in
Engine | Torque
550 Nm / 405.7 lb-ft @ 1850-5500 rpm
520 Nm / 383.5 lb-ft @ 3800 rpm
Engine | Type
Twin-scroll turbocharged direct-injected petrol inline-6 engine with 4 values per cylinder
Bi-turbocharged direct-injected petrol V8 engine
Naturally-aspirated multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Transmission | Gears
8-speed
5-speed
Transmission | Type
Automatic Switch-Tronic
Manual
Production
Availability
2002 ~ 2006
Reviews
Neofiliac score
90%
84%
83%
Pros
- Exceptionally gorgeous top up or down
- Great S55 engine
- Good manual transmission and decent DCT
- Superb level of torque
- Good performance
- Double-wishbone + multi-link suspensions
- Superb styling (but not better than the Z8)
- Good handling (but not better than the Z8)
Cons
- Quite heavy
- Does not handle all that well
- Worse handling despite having double-wishbone front suspensions
- Even lower engine reliability
- A downgrade from the standard E52 Z8
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