Compare BMW 8 Series G14 Convertible vs Alpina Roadster V8 vs Alpina D4 F33 Convertible
Variants
840d MHEV xDrive
840d xDrive
840i
840i Euro6d
840i Euro6d xDrive
840i xDrive
M850i Euro6d xDrive
M850i xDrive
LCI
Pre-LCI
Capacity
Coolant Capacity
9.5 L / 10.0 qt
Fuel Capacity
73.0 L / 19.3 gal
57.0 L / 15.1 gal
Passengers
4
2
4
Payload
335 kg / 739 lbs
450 kg / 992 lbs
Chassis
Brakes | Front
Ventilated discs
Ventilated discs
Ventilated discs
Brakes | Rear
Ventilated discs
Ventilated discs
Ventilated discs
Power Steering
Electric Steering
Hydraulic Steering
Electric Steering
Suspension | Front
Double-wishbone
Double-wishbone
MacPherson strut
Suspension | Rear
Multi-link
Double-wishbone
Multi-link
Tire Size
255/35 R20
Turning Circle
11.9 m
Construction
Body Style
2-door Convertible
2-door Convertible
Dimensions
Size | Height
1320 mm / 52.0 in
Size | Length
4400 mm / 173.2 in
4640 mm / 182.7 in
Size | Width
1830 mm / 72.0 in
1825 mm / 71.9 in
Track Width | Front
1550.0 mm / 61.0 in
1552.0 mm / 61.1 in
Track Width | Rear
1642.0 mm / 64.6 in
1570.0 mm / 61.8 in
1576.0 mm / 62.0 in
Weight
1615.0 kg / 3560.5 lbs
1815.0 kg / 4001.4 lbs
Wheelbase
2822 mm / 111.1 in
2505 mm / 98.6 in
2810 mm / 110.6 in
Performance
Acceleration | 0 - 100 km/h
5.3 sec
5.0 sec
Acceleration | 0 - 60 mph
5.0 sec
4.8 sec
CO2 Emission
155 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)
5.9 L/100km / 39.9 MPG (combined) | 6.6 L/100km / 35.6 MPG (urban) | 5.5 L/100km / 42.8 MPG (highway)
Top Speed
250.0 km/h / 155.3 mph
260.0 km/h / 161.6 mph
275.0 km/h / 170.9 mph
Towing Capacity
750 kg / 1653 lbs (w/o brakes) | 1800 kg / 3968 lbs (w/ brakes @ 12% gradient)
Powertrain
Drivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Emission Standard
Euro 6
Engine | Bore
84.0 mm / 3.3 in
Engine | Compression Ratio
10.5:1
16.5:1
Engine | Displacement
4.8 L / 295.2 cu-in / 4837.0 cc
3.0 L / 182.6 cu-in / 2993.0 cc
Engine | Power
381.0 hp / 284.1 kW @ 5800 rpm
350.0 hp / 261.0 kW @ 4000 rpm
Engine | Specific Output
78.8 hp/L / 1.3 hp/cu-in
116.9 hp/L / 1.9 hp/cu-in
Engine | Stroke
89.0 mm / 3.5 in
90.0 mm / 3.5 in
Engine | Torque
520 Nm / 383.5 lb-ft @ 3800 rpm
700 Nm / 516.3 lb-ft @ 1500-3000 rpm
Engine | Type
Naturally-aspirated multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Transmission | Gears
8-speed
5-speed
8-speed
Transmission | Type
Automatic Steptronic
Manual
Automatic Switch Tronic
Production
Availability
2002 ~ 2006
Debut
2018-11
Made In
Germany
Reviews
Neofiliac score
85%
83%
68%
Pros
- Rather good styling
- Luxurious interior
- Decent performanceGood 0.28 drag coefficient
- Good suspension setup
- Superb styling (but not better than the Z8)
- Good handling (but not better than the Z8)
- Decent performance
- Same styling as the Alpina B4 F33
Cons
- Diesel in a luxury convertible?
- Only soft top
- Poor reliability
- Obsession with AWD
- A downgrade from the standard E52 Z8
- Not different than the base 4 Series with a body kit
- Diesel in a convertible
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