Compare BMW i8 Roadster vs BMW Z4 E89 vs BMW Z4 G29
Variants
Euro 6
Euro 6d
sDrive20i
sDrive20i AT
sDrive23i
sDrive23i AT
sDrive28i
sDrive28i AT
sDrive30i
sDrive30i AT
sDrive35is AT
sDrive35i
sDrive35i AT
M40i
sDrive20i
sDrive20i MT
sDrive30i
Capacity
Cargo Capacity
88 L / 3.1 cu-ft
180 L / 6.4 cu-ft ~ 310 L / 10.9 cu-ft
281 L / 9.9 cu-ft
Engine Oil Capacity
4.2 L / 4.5 qt
Fuel Capacity
30.0 L / 7.9 gal
55.0 L / 14.5 gal
52.0 L / 13.7 gal
Passengers
2
2
2
Payload
255 kg / 562 lbs
Chassis
Brakes | Front
Ventilated discs
Ventilated discs
Ventilated discs
Brakes | Rear
Ventilated discs
Ventilated discs
Ventilated discs
Power Steering
Electric Steering
Electric Steering
Electric Steering
Suspension | Front
Double-wishbone
MacPherson strut
MacPherson strut
Suspension | Rear
Multi-link
Multi-link
Multi-link
Tire Size
Front wheel tires: 195/50 R20 Rear wheel tires: 215/45 R20
Turning Circle
12.3 m / 40.3 ft
9.8 m / 32.1 ft
11.0 m / 36.1 ft
Construction
Battery | Capacity
11.6 kWh (gross) | 9.4 kWh (net)
Battery | Type
Lithium-ion
Battery | Voltage
355.0 V
Body Style
2-door plug-in hybrid Convertible
2-door Convertible
2-door Convertible
Dimensions
Ground Clearance
117 mm
Size | Height
1304 mm / 51.3 in
Size | Length
4689 mm / 184.6 in
4324 mm / 170.2 in
Size | Width
1942 mm / 76.5 in | 2218 mm / 87.3 in (mirror unfolded)
1790 mm / 70.5 in
1864 mm / 73.4 in | 2024 mm / 79.7 in (mirror unfolded)
Track Width | Front
1644.0 mm / 64.7 in
1511.0 mm / 59.5 in
Track Width | Rear
1721.0 mm / 67.8 in
Weight
1595.0 kg / 3516.4 lbs
Wheel Size
Front wheel rims: 7J x 20 Rear wheel rims: 7.5J x 20
Wheelbase
2800 mm / 110.2 in
2496 mm / 98.3 in
2470 mm / 97.2 in
Performance
Acceleration | 0 - 100 km/h
4.6 sec
Acceleration | 0 - 60 mph
4.4 sec
CO2 Emission
46 g/km
Coefficient Of Drag
0.28
Electric Range
53.0 km / 32.9 mi
Fuel Economy
2.0 L/100km / 117.6 MPG (combined)
Top Speed
250.0 km/h / 155.3 mph, 120.0 km/h / 74.6 mph (EV mode)
Powertrain
Drivetrain Layout
Rear-engine (transverse), All-wheel drive
Front-engine (longitudinal), Rear-wheel drive
Engine
B38K15T0
Engine | Bore
82.0 mm / 3.2 in
82.0 mm / 3.2 in
Engine | Compression Ratio
9.5:1
Engine | Displacement
1.5 L / 91.5 cu-in / 1499.0 cc
Engine | Specific Output
154.1 hp/L / 2.5 hp/cu-in
Engine | Stroke
94.6 mm / 3.7 in
94.6 mm / 3.7 in
Engine | Torque
320 Nm / 236.0 lb-ft @ 3700 rpm + 250 Nm / 184.4 lb-ft
Engine | Type
Twin-scroll turbocharged direct-injected petrol inline-3 engine with 4 values per cylinder
Fuel Capacity
52 L
Transmission | Gears
6-speed
8-speed
Transmission | Type
Automatic
ZF 8HP automatic
Production
Debut
2018 Paris Motor Show
Made In
Austria
Reviews
Neofiliac score
37%
84%
77%
Pros
- Supercar-like styling
- Warms the heart of snowflakes
- Good 0.28 drag coefficient
- Superb elegance
- Beautiful with top up or down
- Good N52 engine
- Good transmissions
- Small turning circle
- Good handling characteristics
- Equipped with B58 engine
- Good 0.28 drag coefficient
- Still in RWD
- Manual transmission
Cons
- Tiny, lethargic engine
- Poor performance
- Complex and unreliable
- Impractical
- Stuck with MacPherson struts in the front
- Horrible N20 engine
- Bad N54 engine
- Soft-top only
- B58 capped by Euro 6d nonsense outside the USA
- Low cargo capacity
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