A comprehensive comparison of key specifications between the 2017 Bmw 118I and the 89 Bmw Z1 Roadster. To facilitate a clear understanding, we've organized the essential data into a concise table for your convenience.

To sum it up, we've put together a convenient table below, summarizing the key specifications of 2017 Bmw 118I and 89 Bmw Z1 Roadster. Whether you're drawn to 2017 Bmw 118I's practicality or 89 Bmw Z1 Roadster's beauty, this comparison will help you make an informed decision:

Cars
	2017 BMW 118i	1989 BMW Z1 Roadster
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General
Build Start	2017	1989
ModelVariant	F21	Z1 Roadster
Chassis Code	F21 LCI
Body Details
Body type	4/5 seater sedan/saloon
Brakes
bmep (brake mean effective pressure)	1844.3 kPa (267.5 psi)kPa
Brakes F/R	VeDi/VeDi-S-ABS
Chassis & Geomtry
Length:Wheelbase Ratio	1.61
Dimensions
Fuel Tank Capacity	52litres
Ground clearance	140mm
Height	1421mm	1227mm
Kerb weight	1375kg
Length	4329mm	3921mm
Track/tread (front)	1535mm
Track/tread (rear)	1569mm
Wheelbase	2690mm
Width	1765mm	1690mm
Engine details
Aspiration	Turbo
Bore × Stroke	82 × 94.6mm
Bore/stroke ratio	0.87
Capacity	1.5 litre (1499 cc)
Catalytic converter	Y
Compression Ratio	11:1
Compressor	1 BMW TwinPower turbocharger
Cylinders	Straight 3
Engine coolant	Water
Engine layout	longitudinal
Engine manufacturer	BMW
Engine position	front
Engine Type	turbocharged petrol
Final drive ratio	2.81
Gearbox	6
Specific output	89.4bhp/litre
Specific torque	146.76Nm/litre
Sump	wet sumped
Top gear ratio	0.83
Fuel Consump.
Carbon dioxide emissions	116.0 g/km
CO2 Effizienz (DE)	B
Fuel consumption	6.2/4.3/5.0 l/100km urban/extra-urban/combined
Fuel system	direct petrol injection
km/litre	16.1/23.3/20.0 km/l urban/extra-urban/combined
litres/100km	6.2/4.3/5.0 l/100km urban/extra-urban/combined
UK MPG	45.6/65.7/56.5 UK MPG urban/extra-urban/combined
US MPG	37.9/54.7/47.0 US MPG urban/extra-urban/combined
VED band (UK)	C
Performance
Acceleration 0-100km/h	8.5 ss
Drive wheels	rear wheel drive
maximum power output	136 PS (134 bhp) (100 kW)at 4400 rpm
Maximum speed	210km/h	222km/h
Maximum Torque	220 Nm (162 ft·lb) (22.4 kgm)at 1250-4300 rpmlb/ft
Power-to-weight ratio	98.81 PS/tonne (1000 kg), 72.67 kW/tonne (1000 kg), 97.45 bhp/tonne (1000 kg), 0.04 bhp/lb
Weight-to-power ratio	13.76 kg/kW, 22.99 lb/bhpkg/kW
Prices
Saftey
Wheels & Tyres
Tyres front	195/55 R 16 87H
Tyres rear	195/55 R 16 87H
Wheel size front	16x6½J
Wheel size rear	16x6½J
Aerodynamics
CdA	0.66
Drag coefficient	0.31
Frontal area	2.14 m²
Other
Number of doors	3
RAC rating	12.5
Unitary capacity	499.67cc
Valve gear	double overhead camshaft (DOHC), 4 valves per cylinder, 12 valves in total

In conclusion, the 2017 Bmw 118I and 89 Bmw Z1 Roadster are two distinct cars and your choice ultimately boils down to your individual preferences and priorities. We hope this analysis aids you in your automotive journey, helping you find the perfect fit for your needs and desires.