Key Specifications
| Spec |
Series I (L10A) |
Series II (L10B) |
| Production Years |
1967-1968 |
1968-1972 |
| Manufacturer |
Toyo Kogyo Co., Ltd (Mazda) |
|
| Assembly |
Hiroshima, Japan |
|
| Body Style |
2-door coupe |
|
| Layout |
Front engine, rear-wheel drive |
|
| Wheelbase |
2,200 mm |
2,350 mm |
| Overall Length |
4,140 mm |
4,140 mm |
| Overall Width |
1,595 mm |
1,595 mm |
| Overall Height |
1,165 mm |
1,165 mm |
| Kerb Weight |
940 kg |
960 kg |
| Fuel Tank Capacity |
50 L |
50 L |
| Drag Coefficient |
~0.39 |
~0.39 |
| Seating Capacity |
2 |
2 |
| Units Produced |
343 |
833 |
Engine, Type 10A Twin-Rotor
| Spec |
L10A |
L10B |
| Engine Type |
Twin-rotor Wankel |
|
| Displacement |
491cc x 2 = 982cc |
|
| Rotor Configuration |
2-rotor, peripheral exhaust port |
|
| Rotor Dimensions |
Generating radius: 105 mm |
|
| Eccentricity |
15 mm |
|
| Compression Ratio |
9.4:1 |
9.4:1 |
| Power |
110 PS (81 kW) @ 7,000 rpm |
128 PS (94 kW) @ 7,000 rpm |
| Torque |
130 Nm @ 3,500 rpm |
142 Nm @ 5,000 rpm |
| Fuel System |
Hitachi 4-barrel carburettor |
|
| Ignition |
Contact breaker points, single distributor |
|
| Cooling |
Water-cooled |
|
| Lubrication |
Oil metering pump (apex seal lubrication) |
|
| Recommended Fuel |
98 RON premium unleaded |
|
| Oil Capacity |
~3.5 L |
|
| Redline |
7,000 rpm |
|
Transmission
| Spec |
L10A |
L10B |
| Type |
Manual |
Manual |
| Gears |
4-speed |
5-speed |
| Final Drive |
4.111 |
3.900 |
| Clutch |
Single dry plate |
|
L10B Gear Ratios (5-speed)
| Gear |
Ratio |
| 1st |
3.500 |
| 2nd |
2.170 |
| 3rd |
1.419 |
| 4th |
1.000 |
| 5th |
0.829 |
| Reverse |
3.662 |
Suspension
| Component |
Front |
Rear |
| Type |
Independent, double wishbone |
De Dion tube with trailing arms |
| Springs |
Coil |
Coil |
| Dampers |
Telescopic hydraulic |
Telescopic hydraulic |
| Anti-roll Bar |
Yes |
No |
Brakes
| Component |
Front |
Rear |
| Type |
Disc |
Drum |
| Diameter |
254 mm |
229 mm |
| Servo Assisted |
Yes |
Yes |
Steering
| Spec |
Value |
| Type |
Recirculating ball |
| Power Assist |
No (manual) |
| Turns Lock-to-Lock |
3.2 |
| Turning Circle |
9.4 m |
Performance (Period Test Data)
| Metric |
L10A |
L10B |
| 0-100 km/h |
~10.5 s |
~8.8 s |
| 0-400 m |
~16.3 s |
~15.8 s |
| Top Speed |
185 km/h |
200 km/h |
Fuel Economy (Approximate)
| Condition |
L/100 km |
| City driving |
18-22 |
| Highway cruising |
12-15 |
| Mixed driving |
15-18 |
Electrical
| Spec |
Value |
| Battery |
12V, 36 Ah |
| Alternator |
35A |
| Headlights |
Sealed beam |
| Ignition System |
12V coil, points and condenser |
Wheels and Tyres
| Spec |
Value |
| Wheel Size |
14" x 4.5" steel |
| Bolt Pattern |
4 x 114.3 |
| Tyre Size |
155SR14 |
Exterior Colours (Factory)
The Cosmo Sport was offered in a limited range of colours:
| Colour |
Code |
| White |
, |
| Red |
, |
| Blue |
, |
| Silver |
, |
Note: Factory colour documentation is limited. Custom colours may have been available on special order.
Interior
| Spec |
Value |
| Seats |
Fixed-back bucket, vinyl upholstery |
| Dashboard |
Moulded, full instrumentation |
| Instruments |
Tachometer (central), speedometer, water temperature, oil pressure, fuel level, ammeter |
| Heating |
Yes |
| Air Conditioning |
No (not factory available) |
Dimensions Detail
| Measurement |
L10A |
L10B |
| Front Track |
1,270 mm |
1,270 mm |
| Rear Track |
1,250 mm |
1,250 mm |
| Ground Clearance |
155 mm |
155 mm |
| Front Overhang |
830 mm |
830 mm |
| Rear Overhang |
1,110 mm |
960 mm |
Service Intervals (Recommended)
| Service Item |
Interval |
| Engine oil and filter |
5,000 km or 3 months |
| Apex seal lubrication oil (metering pump) |
Check level at every fuel fill |
| Spark plugs |
10,000-15,000 km |
| Points and condenser |
10,000 km or as needed |
| Coolant |
24 months |
| Compression test |
12 months or 10,000 km |
| Carburettor inspection |
12 months |
| Brake fluid |
24 months |
| Valve (port) clearance |
Not applicable (rotary engine) |
Production Summary
| Detail |
Value |
| Total Production |
1,176 units |
| Series I (L10A) |
343 units (1967-1968) |
| Series II (L10B) |
833 units (1968-1972) |
| Market |
Japan domestic only |
| Factory |
Hiroshima, Japan |
| Original Price (Japan, 1967) |
¥1,480,000 (L10A) |
| Original Price (Japan, 1968) |
¥1,485,000 (L10B) |