Kawasaki Z1 (1973) vs BMW R 100RT (1978-80)
Comparison technical specifications
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| Make: | Kawasaki | BMW |
| Model: | Z1 | R 100RT |
| Years: | 1973 | 1978-80 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder. | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder |
| Capacity: | 903 cc / 55.1 cu-in | 980 cc / 59.8 cub in. |
| Bore x Stroke: | 66 x 66 mm | 94 x 70.6 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 8.5:1 | 9.5:1 |
| Lubrication: | Wet sump, trachoid pump | Wet sump |
| Induction: | 4 x 28mm Mikuni VM28SC | 2 x Constant depression carburettors, Bing 94/40/105 - 94/40/106 |
| Ignition: | Battery and coil | Battery ignition |
| Starting: | Electric & kick | Electric |
| Max Power: | 82 hp / 59.8 kW @ 8500 rpm | 51 kW / 70 hp @ 7000 rpm |
| Max Torque: | 73.5 Nm / 54.3 lb-ft @ 7000 rpm | 76 Nm / 7.7 kgf-m / 56 ft-lb @ 6000 rpm |
| Clutch: | Wet, multi-plate | Dry single plate, with diaphragm spring |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Chain | Shaft |
| Gear Ratio: | 1st 12.79:1 2nd 8.84:1 3rd 6.74:1 4th 5.58:1 5th 4.92:1 | 1st 4.4 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50 : 1 |
| Frame: | Double tubular steel cradle | Double sown tubs, dual cradle |
| Front Suspension: | 36mm Telescopic forks | Telescopic fork with hydraulic shock absorber. |
| Rear Suspension: | Dual shock, 5-way preload adjustment | Long swinging arm with adjustable strut. |
| Front Brakes: | Single 296mm disc 2 piston caliper | 2 x ∅260mm discs 2 piston calipers |
| Rear Brakes: | 200mm drum | Simplex ∅200 mm drum |
| Front Tyre: | 3.25 H19 | 3.25 H-19 |
| Rear Tyre: | 4.00 S18 | 4.00 H-18 |
| Dimensions: | Length 2209.8 mm / 87.0 in. | Length 2110 mm / 87 in Width 746 mm / 29.37 in Height 1465 mm / 57.67 in |
| Wheelbase: | 1498.6 mm / 59.0 in | 1465 mm / 57.67 in |
| Seat Height: | 812.8 mm / 32.0 in. | 820 mm / 32.3 in |
| Ground Clearance: | 170 mm / 6.75 in. | 165 mm / 6.49 in |
| Wet Weight: | 247.6 kg / 546 lbs | 234 kg / 515 lbs |
| Fuel Capacity: | 18 Litres / 4.7 gal | 24 Litres / 6.3 US gal |
| Consumption Average: | 48 mpg | 5.1 L/100km / 19.6 km/l / 46 US mpg |
| Standing ¼ Mile: | 12.61 sec / 105.63 mph | 13.8 sec / 153 km/h / 95 mph |
| Top Speed: | 135 mph | 203 km/h / 126 mph |