Mazda Cosmo Technical Specifications

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Mazda Cosmo Twin Rotary
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  • Years of Manufacture: 1966 - 1972
  • Number Built:
    • Type L10A: 343
    • Type L10B: 1,176
  • Date of Introduction:
    • Prototype and pre-production: 1966
    • Official Launch: 30th May 1967
  • Chassis/Body:
    • Unitary construction (Semi-Monocoque)
  • Exterior Dimensions:
    • Total Length: 13ft. 7in. (4140mm)
    • Total Width: 5ft. 2in. (1595mm)
    • Height at kerb weight: 3ft. 10in. (1165mm)
    • Wheelbase: 7ft. 2in. (2200mm)
  • Kerb Weight:
    • Type L10A: 940kg (2070lb)
    • Type L10B: 990kg (2183lb)
  • Transmission L10A (Manual, 4 Speed):
    • 1st: 3.379:1
    • 2nd: 2.077:1
    • 3rd: 1.39:1
    • 4th: 1.00:1
    • Reverse: 3.389:1
  • Transmission L10B (Manual, 5 Speed):
    • 1st: 3.379:1
    • 2nd: 2.077:1
    • 3rd: 1.39:1
    • 4th: 1.00:1
    • 5th: 0.841:1
    • Reverse: 3.389:1
  • Clutch:
    • Single cushion disc, diaphragm spring dry plate clutch
  • Rear Axle Ratio:
    • Hypoid bevel differential, final drive 4.11:1
  • Maximum Speed:
    • 185 - 200 km/h
  • Standing Quarter Mile (400 metres):
    • 16.3 seconds
  • Engine (2 Rotor Wankel):
    • Capacity: 491cc x 2 Rotors
    • Type: Twin Rotary, watercooled, side intake ports (2 per rotor)
    • Configuration: Front mounted
    • Fuel System: Zenith-Stromberg 4 barrel two-stage carburettor
    • Power:
      • Type L10A: 110 bhp @ 7000 rpm
      • Type L10B: 128 bhp @ 7000 rpm
    • Torque:
      • Type L10A: 13.3 kgm@3500 (=96 lbft)
      • Type L10B: 14.2 kgm@5000 (=103 lbft)
    • Compression Ratio: 9.4:1
  • Ignition and Electrical:
    • 12 volt
    • Twin distributor, conventional points
    • Twin spark plugs per rotor, twin coils
  • Exhaust:
  • Suspension:
    • Front: Unequal length "A" arms, coil spring, tubular shock absorbers, anti roll bar
    • Rear: 51mm solid De-Dion semi elliptic springs, upper trailing links
  • Steering:
    • Rack and Pinion
    • Adjustable steering column
  • Brakes:
    • Front: Disc (power assisted on L10B)
    • Rear: Drum
  • Wheels:
    • Type L10A: 14x4.5 Steel wheels
    • Type L10B: 15x4.5 steel wheels
  • Tyres:
    • Type L10A: 165 SR 14
    • Type L10B: 155 HR 15
Mazda Cosmo
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