Compare Alpina B4 F33 Convertible vs Alpina B6 F12 vs BMW 6 Series E64 Convertible
Variants
B4
B4 S
B4 S Edition 99
B6 Bi-Turbo
B6 Bi-Turbo EDITION 50
630i
630i AT
645Ci
645Ci AT
650i
650i AT
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
300 L / 10.6 cu-ft ~ 350 L / 12.4 cu-ft
Coolant Capacity
14.2 L / 15.0 qt
Fuel Capacity
60.0 L / 15.9 gal
70.0 L / 18.5 gal
70.0 L / 18.5 gal
Passengers
4
4
4
Payload
410 kg / 904 lbs
400 kg / 882 lbs
Chassis
Brakes | Front
Ventilated discs
Ventilated discs
Brakes | Rear
Ventilated discs
Ventilated discs
Disc
Power Steering
Electric Steering
Electric Steering
Hydraulic Steering
Suspension | Front
MacPherson strut
Double-wishbone
MacPherson strut
Suspension | Rear
Multi-link
Multi-link
Multi-link
Tire Size
245/30 ZR20, 265/30 ZR20
Turning Circle
11.4 m / 37.4 ft
Construction
Body Style
2-door Convertible
2-door Convertible
2-door Convertible
Dimensions
Size | Height
1380 mm / 54.3 in
1373 mm / 54.1 in
Size | Length
4640 mm / 182.7 in
4894 mm / 192.7 in
4820 mm / 189.8 in
Size | Width
1825 mm / 71.9 in
1855 mm / 73.0 in
Track Width | Front
1552.0 mm / 61.1 in
1594.0 mm / 62.8 in
1558.0 mm / 61.3 in
Track Width | Rear
1576.0 mm / 62.0 in
Weight
2020.0 kg / 4453.3 lbs
Wheel Size
8J x 20, 9J x 20
Wheelbase
2810 mm / 110.6 in
2855 mm / 112.4 in
2780 mm / 109.4 in
Performance
CO2 Emission
224 g/km
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)
Top Speed
250.0 km/h / 155.3 mph
Towing Capacity
750 kg / 1653 lbs (w/o brakes) | 1700 kg / 3748 lbs (w/ brakes @ 12% gradient)
Powertrain
Drivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Emission Standard
Euro 4
Engine | Bore
84.0 mm / 3.3 in
89.0 mm / 3.5 in
Engine | Compression Ratio
10.2:1
10.0:1
Engine | Displacement
3.0 L / 181.8 cu-in / 2979.0 cc
4.4 L / 268.2 cu-in / 4395.0 cc
Engine | Stroke
89.6 mm / 3.5 in
88.3 mm / 3.5 in
Engine | Type
Bi-turbocharged direct-injected petrol V8 engine
Transmission | Gears
8-speed
8-speed
6-speed
Transmission | Type
Automatic Switch-Tronic
Automatic Switch-Tronic
Reviews
Neofiliac score
76%
84%
72%
Pros
- Still RWD
- Decent performance
- Decent styling
- Superb level of torque
- Good performance
- Double-wishbone + multi-link suspensions
- Decent drivetrain reliability
- Decent looks with the top down
Cons
- Just a trim level on a BMW now
- Worse handling despite having double-wishbone front suspensions
- Even lower engine reliability
- Stuck with MacPherson struts in the front
- Not very good looking with the top up
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