Compare BMW Z4 G29 vs Alpina B6 F12 vs Alpina B3 E46 Convertible
Variants
M40i
sDrive20i
sDrive20i MT
sDrive30i
B6 Bi-Turbo
B6 Bi-Turbo EDITION 50
B3 3.3
B3 3.3 AT
B3 S
B3 S AT
Capacity
Cargo Capacity
281 L / 9.9 cu-ft
300 L / 10.6 cu-ft ~ 350 L / 12.4 cu-ft
300 L / 10.6 cu-ft
Fuel Capacity
52.0 L / 13.7 gal
70.0 L / 18.5 gal
63.0 L / 16.6 gal
Passengers
2
4
4
Payload
410 kg / 904 lbs
420 kg / 926 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
MacPherson strut
Suspension | Rear
Multi-link
Multi-link
Multi-link
Turning Circle
11.0 m / 36.1 ft
Construction
Body Style
2-door Convertible
2-door Convertible
2-door Convertible
Dimensions
Ground Clearance
117 mm
Size | Height
1304 mm / 51.3 in
1352 mm / 53.2 in
Size | Length
4324 mm / 170.2 in
4894 mm / 192.7 in
4488 mm / 176.7 in
Size | Width
1864 mm / 73.4 in | 2024 mm / 79.7 in (mirror unfolded)
1757 mm / 69.2 in
Track Width | Front
1594.0 mm / 62.8 in
1471.0 mm / 57.9 in
Track Width | Rear
1472.0 mm / 58.0 in
Weight
2020.0 kg / 4453.3 lbs
1620.0 kg / 3571.5 lbs
Wheelbase
2470 mm / 97.2 in
2855 mm / 112.4 in
2725 mm / 107.3 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)
Powertrain
Drivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Engine | Bore
82.0 mm / 3.2 in
89.0 mm / 3.5 in
Engine | Compression Ratio
10.0:1
10.2:1
Engine | Displacement
4.4 L / 268.2 cu-in / 4395.0 cc
Engine | Stroke
94.6 mm / 3.7 in
88.3 mm / 3.5 in
93.8 mm / 3.7 in
Engine | Type
Bi-turbocharged direct-injected petrol V8 engine
Naturally-aspirated multi-port injected petrol inline-6 DOHC engine with 4 values per cylinder
Fuel Capacity
52 L
Transmission | Gears
8-speed
8-speed
Transmission | Type
ZF 8HP automatic
Automatic Switch-Tronic
Production
Debut
2018 Paris Motor Show
Made In
Austria
Reviews
Neofiliac score
77%
84%
71%
Pros
- Good handling characteristics
- Equipped with B58 engine
- Good 0.28 drag coefficient
- Still in RWD
- Manual transmission
- Superb level of torque
- Good performance
- Double-wishbone + multi-link suspensions
- Classic Alpina styling
- Decent reliability
Cons
- Soft-top only
- B58 capped by Euro 6d nonsense outside the USA
- Low cargo capacity
- Worse handling despite having double-wishbone front suspensions
- Even lower engine reliability
- Horrible ZF 5HP automatic transmission
- Not the best soft-top for its price
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