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Compare BMW 8 Series G14 Convertible vs Alpina B6 E64 vs Alpina Roadster V8

Variants
840d MHEV xDrive
840d xDrive
840i
840i Euro6d
840i Euro6d xDrive
840i xDrive
M850i Euro6d xDrive
M850i xDrive
B6
B6 S

Capacity

Cargo Capacity
450 L / 15.9 cu-ft
Coolant Capacity
9.5 L / 10.0 qt
Fuel Capacity
70.0 L / 18.5 gal
73.0 L / 19.3 gal
Passengers
4
4
2
Payload
260 kg / 573 lbs
335 kg / 739 lbs

Chassis

Brakes | Front
Ventilated discs
Ventilated discs
Ventilated discs
Brakes | Rear
Ventilated discs
Ventilated discs
Power Steering
Electric Steering
Hydraulic Steering
Suspension | Front
Double-wishbone
MacPherson strut
Double-wishbone
Suspension | Rear
Multi-link
Multi-link
Double-wishbone
Tire Size
255/35 R20
Turning Circle
11.9 m

Construction

Body Style
2-door Convertible
2-door Convertible

Dimensions

Size | Height
1371 mm / 54.0 in
1320 mm / 52.0 in
Size | Length
4820 mm / 189.8 in
4400 mm / 173.2 in
Size | Width
1855 mm / 73.0 in
1830 mm / 72.0 in
Track Width | Front
1558.0 mm / 61.3 in
1550.0 mm / 61.0 in
Track Width | Rear
1642.0 mm / 64.6 in
1598.0 mm / 62.9 in
1570.0 mm / 61.8 in
Weight
1930.0 kg / 4254.9 lbs
1615.0 kg / 3560.5 lbs
Wheelbase
2822 mm / 111.1 in
2780 mm / 109.4 in
2505 mm / 98.6 in

Performance

Acceleration | 0 - 100 km/h
5.3 sec
Acceleration | 0 - 60 mph
5.0 sec
Fuel Economy
18.9 L/100km / 12.4 MPG (combined) | 22.6 L/100km / 10.4 MPG (urban) | 9.3 L/100km / 25.3 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
Emission Standard
Euro 4
Engine | Bore
92.0 mm / 3.6 in
Engine | Compression Ratio
9.0:1
10.5:1
Engine | Displacement
4.4 L / 268.4 cu-in / 4398.0 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
82.7 mm / 3.3 in
89.0 mm / 3.5 in
Engine | Torque
520 Nm / 383.5 lb-ft @ 3800 rpm
Engine | Type
Supercharged multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Naturally-aspirated multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Transmission | Gears
8-speed
6-speed
5-speed
Transmission | Type
Automatic Steptronic
Automatic
Manual

Production

Availability
2002 ~ 2006
Debut
2018-11
Made In
Germany

Reviews

Neofiliac score
85%
87%
83%
Pros
  • Rather good styling
  • Luxurious interior
  • Decent performanceGood 0.28 drag coefficient
  • Good suspension setup
  • Superb elegance and styling
  • Good performance
  • Decent handling
  • Superb styling (but not better than the Z8)
  • Good handling (but not better than the Z8)
Cons
  • Diesel in a luxury convertible?
  • Only soft top
  • Poor reliability
  • Obsession with AWD
  • Very high fuel consumption
  • Stuck with MacPherson struts in the front
  • A downgrade from the standard E52 Z8

Price

Offers (incl. referral links)
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