Compare Alpina Roadster V8 vs Alpina B6 F12 vs BMW M8 F91 Convertible
Variants
B6 Bi-Turbo
B6 Bi-Turbo EDITION 50
M8
M8 Competition
Capacity
Cargo Capacity
300 L / 10.6 cu-ft ~ 350 L / 12.4 cu-ft
350 L / 12.4 cu-ft
Engine Oil Capacity
10.0 L / 10.6 qt
Fuel Capacity
73.0 L / 19.3 gal
70.0 L / 18.5 gal
68.0 L / 18.0 gal
Passengers
2
4
4
Payload
335 kg / 739 lbs
410 kg / 904 lbs
430 kg / 948 lbs
Chassis
Brakes | Front
Ventilated discs
Ventilated discs
Ventilated discs
Brakes | Rear
Ventilated discs
Ventilated discs
Ventilated discs
Power Steering
Hydraulic Steering
Electric Steering
Electric Steering
Suspension | Front
Double-wishbone
Double-wishbone
Double-wishbone
Suspension | Rear
Double-wishbone
Multi-link
Multi-link
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
1353 mm / 53.3 in
Size | Length
4400 mm / 173.2 in
4894 mm / 192.7 in
4867 mm / 191.6 in
Size | Width
1830 mm / 72.0 in
1907 mm / 75.1 in | 2137 mm / 84.1 in (mirror unfolded)
Track Width | Front
1550.0 mm / 61.0 in
1594.0 mm / 62.8 in
1627.0 mm / 64.1 in
Track Width | Rear
1570.0 mm / 61.8 in
1632.0 mm / 64.3 in
Weight
1615.0 kg / 3560.5 lbs
2020.0 kg / 4453.3 lbs
2010.0 kg / 4431.3 lbs
Wheelbase
2505 mm / 98.6 in
2855 mm / 112.4 in
2827 mm / 111.3 in
Performance
Acceleration | 0 - 100 km/h
5.3 sec
Acceleration | 0 - 60 mph
5.0 sec
CO2 Emission
224 g/km
241 ~ 246 g/km
Fuel Economy
9.3 L/100km / 25.3 MPG (combined) | 15.0 L/100km / 15.7 MPG (urban) | 7.5 L/100km / 31.4 MPG (highway)
9.6 L/100km / 24.5 MPG (combined) | 13.2 L/100km / 17.8 MPG (urban) | 7.5 L/100km / 31.4 MPG (highway)
Top Speed
260.0 km/h / 161.6 mph
250.0 km/h / 155.3 mph
Powertrain
Drivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), All-wheel drive
Emission Standard
Euro 6 d-TEMP
Engine
S63B44
Engine | Bore
89.0 mm / 3.5 in
89.0 mm / 3.5 in
Engine | Compression Ratio
10.5:1
10.0:1
10.0:1
Engine | Displacement
4.8 L / 295.2 cu-in / 4837.0 cc
4.4 L / 268.2 cu-in / 4395.0 cc
4.4 L / 268.2 cu-in / 4395.0 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
89.0 mm / 3.5 in
88.3 mm / 3.5 in
88.3 mm / 3.5 in
Engine | Torque
520 Nm / 383.5 lb-ft @ 3800 rpm
Engine | Type
Naturally-aspirated multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Bi-turbocharged direct-injected petrol V8 engine
Twin-scroll turbocharged direct-injected petrol V8 engine with 4 values per cylinder
Transmission | Gears
5-speed
8-speed
8-speed
Transmission | Type
Manual
Automatic Switch-Tronic
Automatic M Steptronic
Production
Availability
2002 ~ 2006
2019
Reviews
Neofiliac score
83%
84%
87%
Pros
- Superb styling (but not better than the Z8)
- Good handling (but not better than the Z8)
- Superb level of torque
- Good performance
- Double-wishbone + multi-link suspensions
- Rather good performance
- Powerful V8 (perhaps the last from BMW)
- Decent handling
- Luxurious interior
Cons
- A downgrade from the standard E52 Z8
- Worse handling despite having double-wishbone front suspensions
- Even lower engine reliability
- Poor ride comfort
- Reliability concerns
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