Compare BMW M3 E46 Convertible vs Alpina Roadster V8 vs Alpina B6 E64
Variants
B6
B6 S
Capacity
Cargo Capacity
300 L / 10.6 cu-ft
450 L / 15.9 cu-ft
Coolant Capacity
6.0 L / 6.3 qt
Engine Oil Capacity
5.5 L / 5.8 qt
Fuel Capacity
63.0 L / 16.6 gal
73.0 L / 19.3 gal
70.0 L / 18.5 gal
Passengers
4
2
4
Payload
445 kg / 981 lbs
335 kg / 739 lbs
260 kg / 573 lbs
Chassis
Brakes | Front
Ventilated discs
Ventilated discs
Ventilated discs
Brakes | Rear
Disc
Ventilated discs
Power Steering
Hydraulic Steering
Hydraulic Steering
Suspension | Front
MacPherson strut
Double-wishbone
MacPherson strut
Suspension | Rear
Multi-link
Double-wishbone
Multi-link
Tire Size
225/45 R18, 255/40 R18
255/35 R20
Turning Circle
11.0 m / 36.1 ft
Construction
Body Style
2-door Convertible
2-door Convertible
2-door Convertible
Dimensions
Size | Height
1363 mm / 53.7 in
1320 mm / 52.0 in
1371 mm / 54.0 in
Size | Length
4492 mm / 176.9 in
4400 mm / 173.2 in
4820 mm / 189.8 in
Size | Width
1780 mm / 70.1 in
1830 mm / 72.0 in
1855 mm / 73.0 in
Track Width | Front
1508.0 mm / 59.4 in
1550.0 mm / 61.0 in
1558.0 mm / 61.3 in
Track Width | Rear
1525.0 mm / 60.0 in
1570.0 mm / 61.8 in
1598.0 mm / 62.9 in
Weight
1655.0 kg / 3648.7 lbs
1615.0 kg / 3560.5 lbs
1930.0 kg / 4254.9 lbs
Wheel Size
8J x 18, 9J x 18
Wheelbase
2731 mm / 107.5 in
2505 mm / 98.6 in
2780 mm / 109.4 in
Performance
Acceleration | 0 - 100 km/h
5.5 sec
5.3 sec
Acceleration | 0 - 60 mph
5.2 sec
5.0 sec
Coefficient Of Drag
0.35
Fuel Economy
12.1 L/100km / 19.4 MPG (combined) | 17.9 L/100km / 13.1 MPG (urban) | 8.8 L/100km / 26.7 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)
18.9 L/100km / 12.4 MPG (combined) | 22.6 L/100km / 10.4 MPG (urban) | 9.3 L/100km / 25.3 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
Front-engine (longitudinal), Rear-wheel drive
Emission Standard
Euro 4
Engine
S54B32
Engine | Bore
87.0 mm / 3.4 in
92.0 mm / 3.6 in
Engine | Compression Ratio
11.5:1
10.5:1
9.0:1
Engine | Displacement
3.2 L / 198.1 cu-in / 3246.0 cc
4.8 L / 295.2 cu-in / 4837.0 cc
4.4 L / 268.4 cu-in / 4398.0 cc
Engine | Power
343.0 hp / 255.8 kW @ 7900 rpm
381.0 hp / 284.1 kW @ 5800 rpm
Engine | Specific Output
105.7 hp/L / 1.7 hp/cu-in
78.8 hp/L / 1.3 hp/cu-in
Engine | Stroke
91.0 mm / 3.6 in
89.0 mm / 3.5 in
82.7 mm / 3.3 in
Engine | Torque
365 Nm / 269.2 lb-ft @ 4900 rpm
520 Nm / 383.5 lb-ft @ 3800 rpm
Engine | Type
Naturally-aspirated multi-port injected petrol inline-6 DOHC engine with 4 values per cylinder
Naturally-aspirated multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Supercharged multi-port injected petrol V8 DOHC engine with 4 values per cylinder
Transmission | Gears
6-speed
5-speed
6-speed
Transmission | Type
Manual
Manual
Automatic
Production
Availability
2001 ~ 2006
2002 ~ 2006
Reviews
Neofiliac score
71%
83%
87%
Pros
- Good S54 engine
- Decent styling
- Good manual transmission
- Superb styling (but not better than the Z8)
- Good handling (but not better than the Z8)
- Superb elegance and styling
- Good performance
- Decent handling
Cons
- Horrible SMG transmission
- Basic suspension setup
- Worse handling than the Coupe
- A downgrade from the standard E52 Z8
- Very high fuel consumption
- Stuck with MacPherson struts in the front
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